procps/proc/stat.c

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library: readstat redesigned using 'stack' vs. 'chain' In addition to that text shown below the line which is common to several commit messages, this patch contains several minor changes with lessor impact upon the API: . A call to procps_stat_read_jiffs() has been added to those jiffs functions carrying the 'fill' nomenclature to parallel like functions in some of our other files. . The #include header files are ordered alphabetically now, with all those <sys/??> types separately grouped. . Standard copyright boilerplate was added in .c file. . The header file follows the conventions of indenting (by 4 spaces) those parameters too lengthy for 1 line. ------------------------------------------------------ . The former 'chains' have now become 'stacks' without the 'next' pointer in each result struct. The pointers initially seemed to offer some flexibility with memory allocations and benefits for the library access logic. However, user access was always via displacement and a a statically allocated chain was cumbersome to define. . An enumerator ending in '_noop' will no longer serve as a fencepost delimiter. Rather, it has become a much more important and flexible user oriented tool. Adding one or more such 'items' in any items list passed into the library becomes the means of extending the 'stack' to also include user (not just library) data. Any such data is guaranteed to never be altered by the library. . Anticipating PID support, where many different types must be represented in a result structure, we'll adopt a common naming standard. And, while not every results structure currently needs to reflect disparate types a union will be employed so the same dot qualifier ('.') can be used consistently when accessing all such data. Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-07-21 10:30:00 +05:30
/*
* libprocps - Library to read proc filesystem
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef NUMA_DISABLE
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#include <dlfcn.h>
#endif
library: readstat redesigned using 'stack' vs. 'chain' In addition to that text shown below the line which is common to several commit messages, this patch contains several minor changes with lessor impact upon the API: . A call to procps_stat_read_jiffs() has been added to those jiffs functions carrying the 'fill' nomenclature to parallel like functions in some of our other files. . The #include header files are ordered alphabetically now, with all those <sys/??> types separately grouped. . Standard copyright boilerplate was added in .c file. . The header file follows the conventions of indenting (by 4 spaces) those parameters too lengthy for 1 line. ------------------------------------------------------ . The former 'chains' have now become 'stacks' without the 'next' pointer in each result struct. The pointers initially seemed to offer some flexibility with memory allocations and benefits for the library access logic. However, user access was always via displacement and a a statically allocated chain was cumbersome to define. . An enumerator ending in '_noop' will no longer serve as a fencepost delimiter. Rather, it has become a much more important and flexible user oriented tool. Adding one or more such 'items' in any items list passed into the library becomes the means of extending the 'stack' to also include user (not just library) data. Any such data is guaranteed to never be altered by the library. . Anticipating PID support, where many different types must be represented in a result structure, we'll adopt a common naming standard. And, while not every results structure currently needs to reflect disparate types a union will be employed so the same dot qualifier ('.') can be used consistently when accessing all such data. Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-07-21 10:30:00 +05:30
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#include <time.h>
library: readstat redesigned using 'stack' vs. 'chain' In addition to that text shown below the line which is common to several commit messages, this patch contains several minor changes with lessor impact upon the API: . A call to procps_stat_read_jiffs() has been added to those jiffs functions carrying the 'fill' nomenclature to parallel like functions in some of our other files. . The #include header files are ordered alphabetically now, with all those <sys/??> types separately grouped. . Standard copyright boilerplate was added in .c file. . The header file follows the conventions of indenting (by 4 spaces) those parameters too lengthy for 1 line. ------------------------------------------------------ . The former 'chains' have now become 'stacks' without the 'next' pointer in each result struct. The pointers initially seemed to offer some flexibility with memory allocations and benefits for the library access logic. However, user access was always via displacement and a a statically allocated chain was cumbersome to define. . An enumerator ending in '_noop' will no longer serve as a fencepost delimiter. Rather, it has become a much more important and flexible user oriented tool. Adding one or more such 'items' in any items list passed into the library becomes the means of extending the 'stack' to also include user (not just library) data. Any such data is guaranteed to never be altered by the library. . Anticipating PID support, where many different types must be represented in a result structure, we'll adopt a common naming standard. And, while not every results structure currently needs to reflect disparate types a union will be employed so the same dot qualifier ('.') can be used consistently when accessing all such data. Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-07-21 10:30:00 +05:30
#include <unistd.h>
#include <sys/stat.h>
library: readstat redesigned using 'stack' vs. 'chain' In addition to that text shown below the line which is common to several commit messages, this patch contains several minor changes with lessor impact upon the API: . A call to procps_stat_read_jiffs() has been added to those jiffs functions carrying the 'fill' nomenclature to parallel like functions in some of our other files. . The #include header files are ordered alphabetically now, with all those <sys/??> types separately grouped. . Standard copyright boilerplate was added in .c file. . The header file follows the conventions of indenting (by 4 spaces) those parameters too lengthy for 1 line. ------------------------------------------------------ . The former 'chains' have now become 'stacks' without the 'next' pointer in each result struct. The pointers initially seemed to offer some flexibility with memory allocations and benefits for the library access logic. However, user access was always via displacement and a a statically allocated chain was cumbersome to define. . An enumerator ending in '_noop' will no longer serve as a fencepost delimiter. Rather, it has become a much more important and flexible user oriented tool. Adding one or more such 'items' in any items list passed into the library becomes the means of extending the 'stack' to also include user (not just library) data. Any such data is guaranteed to never be altered by the library. . Anticipating PID support, where many different types must be represented in a result structure, we'll adopt a common naming standard. And, while not every results structure currently needs to reflect disparate types a union will be employed so the same dot qualifier ('.') can be used consistently when accessing all such data. Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-07-21 10:30:00 +05:30
#include <sys/types.h>
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#include <proc/sysinfo.h>
#include <proc/procps-private.h>
#include <proc/stat.h>
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#define STAT_FILE "/proc/stat"
#define STACKS_INCR 32 // amount reap stack allocations grow
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#define NEWOLD_INCR 32 // amount jiffs hist allocations grow
/* ------------------------------------------------------------------------- +
a strictly development #define, existing specifically for the top program |
( and it has no affect if ./configure --disable-numa has been specified ) | */
//#define PRETEND_NUMA // pretend there are 3 'discontiguous' numa nodes |
// ------------------------------------------------------------------------- +
/* ------------------------------------------------------------------------- +
because 'reap' would be forced to duplicate the global SYS stuff in every |
TIC type results stack, the following #define can be used to enforce that |
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
only STAT_noop and STAT_extra plus all the STAT_TIC items will be allowed | */
//#define ENFORCE_LOGICAL // ensure only logical items are accepted by reap |
// ------------------------------------------------------------------------- +
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct stat_jifs {
unsigned long long user, nice, system, idle, iowait, irq, sirq, stolen, guest, gnice;
};
struct stat_data {
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
unsigned long intr;
unsigned long ctxt;
unsigned long btime;
unsigned long procs_created;
unsigned long procs_blocked;
unsigned long procs_running;
};
struct hist_sys {
struct stat_data new;
struct stat_data old;
};
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct hist_tic {
int id;
int numa_node;
struct stat_jifs new;
struct stat_jifs old;
};
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct stacks_extent {
int ext_numstacks;
struct stacks_extent *next;
struct stat_stack **stacks;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
};
struct item_support {
int num; // includes 'logical_end' delimiter
enum stat_item *enums; // includes 'logical_end' delimiter
};
struct ext_support {
struct item_support *items; // how these stacks are configured
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct stacks_extent *extents; // anchor for these extents
int dirty_stacks;
};
struct tic_support {
int n_alloc; // number of below structs allocated
int n_inuse; // number of below structs occupied
struct hist_tic *tics; // actual new/old jiffies
};
struct reap_support {
int total; // independently obtained # of cpus/nodes
struct ext_support fetch; // extents plus items details
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct tic_support hist; // cpu and node jiffies management
int n_alloc; // last known anchor pointers allocation
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct stat_stack **anchor; // reapable stacks (consolidated extents)
int n_alloc_save; // last known results.stacks allocation
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct stat_reap result; // summary + stacks returned to caller
};
struct stat_info {
int refcount;
int stat_fd;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
int stat_was_read; // is stat file history valid?
struct hist_sys sys_hist; // SYS type management
struct hist_tic cpu_hist; // TIC type management for cpu summary
struct reap_support cpus; // TIC type management for real cpus
struct reap_support nodes; // TIC type management for numa nodes
struct ext_support cpu_summary; // supports /proc/stat line #1 results
struct ext_support select; // support for 'procps_stat_select()'
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct stat_reaped results; // for return to caller after a reap
#ifndef NUMA_DISABLE
void *libnuma_handle; // if dlopen() for libnuma succeessful
int (*our_max_node)(void); // a libnuma function call via dlsym()
int (*our_node_of_cpu)(int); // a libnuma function call via dlsym()
#endif
struct stat_result get_this; // for return to caller after a get
struct item_support reap_items; // items used for reap (shared among 3)
struct item_support select_items; // items unique to select
};
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
// ___ Results 'Set' Support ||||||||||||||||||||||||||||||||||||||||||||||||||
#define setNAME(e) set_stat_ ## e
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#define setDECL(e) static void setNAME(e) \
(struct stat_result *R, struct hist_sys *S, struct hist_tic *T)
// regular assignment
#define TIC_set(e,t,x) setDECL(e) { \
(void)S; R->result. t = T->new . x; }
#define SYS_set(e,t,x) setDECL(e) { \
(void)T; R->result. t = S->new . x; }
// delta assignment
#define TICsetH(e,t,x) setDECL(e) { \
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
(void)S; R->result. t = ( T->new . x - T->old. x ); \
if (R->result. t < 0) R->result. t = 0; }
#define SYSsetH(e,t,x) setDECL(e) { \
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
(void)T; R->result. t = ( S->new . x - S->old. x ); \
if (R->result. t < 0) R->result. t = 0; }
setDECL(noop) { (void)R; (void)S; (void)T; }
setDECL(extra) { (void)R; (void)S; (void)T; }
setDECL(TIC_ID) { (void)S; R->result.s_int = T->id; }
setDECL(TIC_NUMA_NODE) { (void)S; R->result.s_int = T->numa_node; }
TIC_set(TIC_USER, ull_int, user)
TIC_set(TIC_NICE, ull_int, nice)
TIC_set(TIC_SYSTEM, ull_int, system)
TIC_set(TIC_IDLE, ull_int, idle)
TIC_set(TIC_IOWAIT, ull_int, iowait)
TIC_set(TIC_IRQ, ull_int, irq)
TIC_set(TIC_SOFTIRQ, ull_int, sirq)
TIC_set(TIC_STOLEN, ull_int, stolen)
TIC_set(TIC_GUEST, ull_int, guest)
TIC_set(TIC_GUEST_NICE, ull_int, gnice)
TICsetH(TIC_DELTA_USER, sl_int, user)
TICsetH(TIC_DELTA_NICE, sl_int, nice)
TICsetH(TIC_DELTA_SYSTEM, sl_int, system)
TICsetH(TIC_DELTA_IDLE, sl_int, idle)
TICsetH(TIC_DELTA_IOWAIT, sl_int, iowait)
TICsetH(TIC_DELTA_IRQ, sl_int, irq)
TICsetH(TIC_DELTA_SOFTIRQ, sl_int, sirq)
TICsetH(TIC_DELTA_STOLEN, sl_int, stolen)
TICsetH(TIC_DELTA_GUEST, sl_int, guest)
TICsetH(TIC_DELTA_GUEST_NICE, sl_int, gnice)
SYS_set(SYS_CTX_SWITCHES, ul_int, ctxt)
SYS_set(SYS_INTERRUPTS, ul_int, intr)
SYS_set(SYS_PROC_BLOCKED, ul_int, procs_blocked)
SYS_set(SYS_PROC_CREATED, ul_int, procs_created)
SYS_set(SYS_PROC_RUNNING, ul_int, procs_running)
SYS_set(SYS_TIME_OF_BOOT, ul_int, btime)
SYSsetH(SYS_DELTA_CTX_SWITCHES, s_int, ctxt)
SYSsetH(SYS_DELTA_INTERRUPTS, s_int, intr)
setDECL(SYS_DELTA_PROC_BLOCKED) { (void)T; R->result.s_int = S->new.procs_blocked - S->old.procs_blocked; }
SYSsetH(SYS_DELTA_PROC_CREATED, s_int, procs_created)
setDECL(SYS_DELTA_PROC_RUNNING) { (void)T; R->result.s_int = S->new.procs_running - S->old.procs_running; }
library: more tweaks for code and/or comments, 3rd gen Following is a summary of significant changes (if any) to each of these now upgraded 3rd gen library modules. <meminfo> ............................................ . eliminated duplicate decl of 'struct procps_meminfo' . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . how did i miss relocating all these friggin' #undefs . cleanup 'get' return logic (remove a redundant 'if') <pids> ............................................... . repositioned the procps_pidsinfo structure in header . removed the extra trailing comma from enum pids_item . standardized/normalized results struct union members <slabinfo> ........................................... . corrected comment typo (jeeze, in an 'aligned' para) . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . removed an obsolete #undef from procps_slabinfo_sort . cleanup 'get' return logic (remove a redundant 'if') <stat> ............................................... . how did i miss relocating all these friggin' #undefs . corrected an initialization fencepost used with numa <=== see Craig, here's a bug fix . removed the extra trailing comma from enum stat_item . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . strengthen those parm checks in procps_stat_get func . cleanup 'get' return logic (remove a redundant 'if') <vmstat> ............................................. . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . cleanup 'get' return logic (remove a redundant 'if') [ virtually all of these tweaks reflect the author's ] [ continuing pursuit of an unreasonable goal -- that ] [ of a 'perfect' (plus 'pretty') C language program! ] Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-14 10:30:00 +05:30
#undef setDECL
#undef TIC_set
#undef SYS_set
#undef TICsetH
#undef SYSsetH
// ___ Sorting Support ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
struct sort_parms {
int offset;
enum stat_sort_order order;
};
#define srtNAME(t) sort_stat_ ## t
#define srtDECL(t) static int srtNAME(t) \
(const struct stat_stack **A, const struct stat_stack **B, struct sort_parms *P)
srtDECL(s_int) {
const struct stat_result *a = (*A)->head + P->offset; \
const struct stat_result *b = (*B)->head + P->offset; \
return P->order * (a->result.s_int - b->result.s_int);
}
srtDECL(sl_int) {
const struct stat_result *a = (*A)->head + P->offset; \
const struct stat_result *b = (*B)->head + P->offset; \
return P->order * (a->result.sl_int - b->result.sl_int);
}
srtDECL(ul_int) {
const struct stat_result *a = (*A)->head + P->offset; \
const struct stat_result *b = (*B)->head + P->offset; \
if ( a->result.ul_int > b->result.ul_int ) return P->order > 0 ? 1 : -1; \
if ( a->result.ul_int < b->result.ul_int ) return P->order > 0 ? -1 : 1; \
return 0;
}
srtDECL(ull_int) {
const struct stat_result *a = (*A)->head + P->offset; \
const struct stat_result *b = (*B)->head + P->offset; \
if ( a->result.ull_int > b->result.ull_int ) return P->order > 0 ? 1 : -1; \
if ( a->result.ull_int < b->result.ull_int ) return P->order > 0 ? -1 : 1; \
return 0;
}
srtDECL(noop) { \
(void)A; (void)B; (void)P; \
return 0;
}
#undef srtDECL
// ___ Controlling Table ||||||||||||||||||||||||||||||||||||||||||||||||||||||
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
typedef void (*SET_t)(struct stat_result *, struct hist_sys *, struct hist_tic *);
#define RS(e) (SET_t)setNAME(e)
typedef int (*QSR_t)(const void *, const void *, void *);
#define QS(t) (QSR_t)srtNAME(t)
#define TS(t) STRINGIFY(t)
#define TS_noop ""
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
/*
* Need it be said?
* This table must be kept in the exact same order as
* those 'enum stat_item' guys ! */
static struct {
SET_t setsfunc; // the actual result setting routine
QSR_t sortfunc; // sort cmp func for a specific type
char *type2str; // the result type as a string value
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
} Item_table[] = {
/* setsfunc sortfunc type2str
--------------------------- ------------ ----------- */
{ RS(noop), QS(noop), TS_noop },
{ RS(extra), QS(ull_int), TS_noop },
{ RS(TIC_ID), QS(s_int), TS(s_int) },
{ RS(TIC_NUMA_NODE), QS(s_int), TS(s_int) },
{ RS(TIC_USER), QS(ull_int), TS(ull_int) },
{ RS(TIC_NICE), QS(ull_int), TS(ull_int) },
{ RS(TIC_SYSTEM), QS(ull_int), TS(ull_int) },
{ RS(TIC_IDLE), QS(ull_int), TS(ull_int) },
{ RS(TIC_IOWAIT), QS(ull_int), TS(ull_int) },
{ RS(TIC_IRQ), QS(ull_int), TS(ull_int) },
{ RS(TIC_SOFTIRQ), QS(ull_int), TS(ull_int) },
{ RS(TIC_STOLEN), QS(ull_int), TS(ull_int) },
{ RS(TIC_GUEST), QS(ull_int), TS(ull_int) },
{ RS(TIC_GUEST_NICE), QS(ull_int), TS(ull_int) },
{ RS(TIC_DELTA_USER), QS(sl_int), TS(sl_int) },
{ RS(TIC_DELTA_NICE), QS(sl_int), TS(sl_int) },
{ RS(TIC_DELTA_SYSTEM), QS(sl_int), TS(sl_int) },
{ RS(TIC_DELTA_IDLE), QS(sl_int), TS(sl_int) },
{ RS(TIC_DELTA_IOWAIT), QS(sl_int), TS(sl_int) },
{ RS(TIC_DELTA_IRQ), QS(sl_int), TS(sl_int) },
{ RS(TIC_DELTA_SOFTIRQ), QS(sl_int), TS(sl_int) },
{ RS(TIC_DELTA_STOLEN), QS(sl_int), TS(sl_int) },
{ RS(TIC_DELTA_GUEST), QS(sl_int), TS(sl_int) },
{ RS(TIC_DELTA_GUEST_NICE), QS(sl_int), TS(sl_int) },
{ RS(SYS_CTX_SWITCHES), QS(ul_int), TS(ul_int) },
{ RS(SYS_INTERRUPTS), QS(ul_int), TS(ul_int) },
{ RS(SYS_PROC_BLOCKED), QS(ul_int), TS(ul_int) },
{ RS(SYS_PROC_CREATED), QS(ul_int), TS(ul_int) },
{ RS(SYS_PROC_RUNNING), QS(ul_int), TS(ul_int) },
{ RS(SYS_TIME_OF_BOOT), QS(ul_int), TS(ul_int) },
{ RS(SYS_DELTA_CTX_SWITCHES), QS(s_int), TS(s_int) },
{ RS(SYS_DELTA_INTERRUPTS), QS(s_int), TS(s_int) },
{ RS(SYS_DELTA_PROC_BLOCKED), QS(s_int), TS(s_int) },
{ RS(SYS_DELTA_PROC_CREATED), QS(s_int), TS(s_int) },
{ RS(SYS_DELTA_PROC_RUNNING), QS(s_int), TS(s_int) },
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
// dummy entry corresponding to STAT_logical_end ...
{ NULL, NULL, NULL }
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
};
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
/* please note,
* 1st enum MUST be kept in sync with highest TIC type
* 2nd enum MUST be 1 greater than the highest value of any enum */
#ifdef ENFORCE_LOGICAL
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
enum stat_item STAT_TIC_highest = STAT_TIC_DELTA_GUEST_NICE;
#endif
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
enum stat_item STAT_logical_end = STAT_SYS_DELTA_PROC_RUNNING + 1;
#undef setNAME
#undef srtNAME
#undef RS
#undef QS
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
// ___ Private Functions ||||||||||||||||||||||||||||||||||||||||||||||||||||||
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#ifndef NUMA_DISABLE
#ifdef PRETEND_NUMA
static int fake_max_node (void) { return 3; }
static int fake_node_of_cpu (int n) { return (1 == (n % 4)) ? 0 : (n % 4); }
#endif
#endif
static inline void stat_assign_results (
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct stat_stack *stack,
struct hist_sys *sys_hist,
struct hist_tic *tic_hist)
{
struct stat_result *this = stack->head;
for (;;) {
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
enum stat_item item = this->item;
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
if (item >= STAT_logical_end)
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
break;
Item_table[item].setsfunc(this, sys_hist, tic_hist);
++this;
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return;
} // end: stat_assign_results
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
static inline void stat_cleanup_stack (
struct stat_result *this)
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
{
for (;;) {
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
if (this->item >= STAT_logical_end)
break;
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
if (this->item > STAT_noop)
this->result.ull_int = 0;
++this;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
}
} // end: stat_cleanup_stack
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
static inline void stat_cleanup_stacks_all (
struct ext_support *this)
{
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct stacks_extent *ext = this->extents;
int i;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
while (ext) {
for (i = 0; ext->stacks[i]; i++)
stat_cleanup_stack(ext->stacks[i]->head);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
ext = ext->next;
};
this->dirty_stacks = 0;
} // end: stat_cleanup_stacks_all
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
static void stat_extents_free_all (
struct ext_support *this)
{
while (this->extents) {
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct stacks_extent *p = this->extents;
this->extents = this->extents->next;
free(p);
};
} // end: stat_extents_free_all
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
static inline struct stat_result *stat_itemize_stack (
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct stat_result *p,
int depth,
enum stat_item *items)
{
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct stat_result *p_sav = p;
int i;
for (i = 0; i < depth; i++) {
p->item = items[i];
p->result.ull_int = 0;
++p;
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return p_sav;
} // end: stat_itemize_stack
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
static inline int stat_items_check_failed (
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
int numitems,
enum stat_item *items)
{
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
int i;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
/* if an enum is passed instead of an address of one or more enums, ol' gcc
* will silently convert it to an address (possibly NULL). only clang will
* offer any sort of warning like the following:
*
* warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'enum stat_item *'
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
* my_stack = procps_stat_select(info, STAT_noop, num);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
* ^~~~~~~~~~~~~~~~
*/
if (numitems < 1
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
|| (void *)items < (void *)(unsigned long)(2 * STAT_logical_end))
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return -1;
for (i = 0; i < numitems; i++) {
// a stat_item is currently unsigned, but we'll protect our future
if (items[i] < 0)
return -1;
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
if (items[i] >= STAT_logical_end) {
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return -1;
}
library: readstat redesigned using 'stack' vs. 'chain' In addition to that text shown below the line which is common to several commit messages, this patch contains several minor changes with lessor impact upon the API: . A call to procps_stat_read_jiffs() has been added to those jiffs functions carrying the 'fill' nomenclature to parallel like functions in some of our other files. . The #include header files are ordered alphabetically now, with all those <sys/??> types separately grouped. . Standard copyright boilerplate was added in .c file. . The header file follows the conventions of indenting (by 4 spaces) those parameters too lengthy for 1 line. ------------------------------------------------------ . The former 'chains' have now become 'stacks' without the 'next' pointer in each result struct. The pointers initially seemed to offer some flexibility with memory allocations and benefits for the library access logic. However, user access was always via displacement and a a statically allocated chain was cumbersome to define. . An enumerator ending in '_noop' will no longer serve as a fencepost delimiter. Rather, it has become a much more important and flexible user oriented tool. Adding one or more such 'items' in any items list passed into the library becomes the means of extending the 'stack' to also include user (not just library) data. Any such data is guaranteed to never be altered by the library. . Anticipating PID support, where many different types must be represented in a result structure, we'll adopt a common naming standard. And, while not every results structure currently needs to reflect disparate types a union will be employed so the same dot qualifier ('.') can be used consistently when accessing all such data. Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-07-21 10:30:00 +05:30
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return 0;
} // end: stat_items_check_failed
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
static int stat_make_numa_hist (
struct stat_info *info)
{
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#ifndef NUMA_DISABLE
struct hist_tic *cpu_ptr, *nod_ptr;
int i, node;
if (info->libnuma_handle == NULL)
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return 0;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
/* are numa nodes dynamic like online cpus can be?
( and be careful, this libnuma call returns the highest node id in use, )
( NOT an actual number of nodes - some of those 'slots' might be unused ) */
info->nodes.total = info->our_max_node() + 1;
library: more tweaks for code and/or comments, 3rd gen Following is a summary of significant changes (if any) to each of these now upgraded 3rd gen library modules. <meminfo> ............................................ . eliminated duplicate decl of 'struct procps_meminfo' . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . how did i miss relocating all these friggin' #undefs . cleanup 'get' return logic (remove a redundant 'if') <pids> ............................................... . repositioned the procps_pidsinfo structure in header . removed the extra trailing comma from enum pids_item . standardized/normalized results struct union members <slabinfo> ........................................... . corrected comment typo (jeeze, in an 'aligned' para) . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . removed an obsolete #undef from procps_slabinfo_sort . cleanup 'get' return logic (remove a redundant 'if') <stat> ............................................... . how did i miss relocating all these friggin' #undefs . corrected an initialization fencepost used with numa <=== see Craig, here's a bug fix . removed the extra trailing comma from enum stat_item . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . strengthen those parm checks in procps_stat_get func . cleanup 'get' return logic (remove a redundant 'if') <vmstat> ............................................. . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . cleanup 'get' return logic (remove a redundant 'if') [ virtually all of these tweaks reflect the author's ] [ continuing pursuit of an unreasonable goal -- that ] [ of a 'perfect' (plus 'pretty') C language program! ] Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-14 10:30:00 +05:30
if (info->nodes.hist.n_alloc == 0
|| (info->nodes.total >= info->nodes.hist.n_alloc)) {
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
info->nodes.hist.n_alloc = info->nodes.total + NEWOLD_INCR;
info->nodes.hist.tics = realloc(info->nodes.hist.tics, info->nodes.hist.n_alloc * sizeof(struct hist_tic));
if (info->nodes.hist.tics == NULL)
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return -ENOMEM;
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
// forget all of the prior node statistics & anticipate unassigned slots
memset(info->nodes.hist.tics, 0, info->nodes.hist.n_alloc * sizeof(struct hist_tic));
nod_ptr = info->nodes.hist.tics;
library: more tweaks for code and/or comments, 3rd gen Following is a summary of significant changes (if any) to each of these now upgraded 3rd gen library modules. <meminfo> ............................................ . eliminated duplicate decl of 'struct procps_meminfo' . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . how did i miss relocating all these friggin' #undefs . cleanup 'get' return logic (remove a redundant 'if') <pids> ............................................... . repositioned the procps_pidsinfo structure in header . removed the extra trailing comma from enum pids_item . standardized/normalized results struct union members <slabinfo> ........................................... . corrected comment typo (jeeze, in an 'aligned' para) . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . removed an obsolete #undef from procps_slabinfo_sort . cleanup 'get' return logic (remove a redundant 'if') <stat> ............................................... . how did i miss relocating all these friggin' #undefs . corrected an initialization fencepost used with numa <=== see Craig, here's a bug fix . removed the extra trailing comma from enum stat_item . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . strengthen those parm checks in procps_stat_get func . cleanup 'get' return logic (remove a redundant 'if') <vmstat> ............................................. . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . cleanup 'get' return logic (remove a redundant 'if') [ virtually all of these tweaks reflect the author's ] [ continuing pursuit of an unreasonable goal -- that ] [ of a 'perfect' (plus 'pretty') C language program! ] Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-14 10:30:00 +05:30
for (i = 0; i < info->nodes.total; i++) {
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
nod_ptr->id = nod_ptr->numa_node = STAT_NODE_INVALID;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
++nod_ptr;
}
// spin thru each cpu and value the jiffs for it's numa node
for (i = 0; i < info->cpus.hist.n_inuse; i++) {
cpu_ptr = info->cpus.hist.tics + i;
if (-1 < (node = info->our_node_of_cpu(cpu_ptr->id))) {
nod_ptr = info->nodes.hist.tics + node;
nod_ptr->new.user += cpu_ptr->new.user; nod_ptr->old.user += cpu_ptr->old.user;
nod_ptr->new.nice += cpu_ptr->new.nice; nod_ptr->old.nice += cpu_ptr->old.nice;
nod_ptr->new.system += cpu_ptr->new.system; nod_ptr->old.system += cpu_ptr->old.system;
nod_ptr->new.idle += cpu_ptr->new.idle; nod_ptr->old.idle += cpu_ptr->old.idle;
nod_ptr->new.iowait += cpu_ptr->new.iowait; nod_ptr->old.iowait += cpu_ptr->old.iowait;
nod_ptr->new.irq += cpu_ptr->new.irq; nod_ptr->old.irq += cpu_ptr->old.irq;
nod_ptr->new.sirq += cpu_ptr->new.sirq; nod_ptr->old.sirq += cpu_ptr->old.sirq;
nod_ptr->new.stolen += cpu_ptr->new.stolen; nod_ptr->old.stolen += cpu_ptr->old.stolen;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
cpu_ptr->numa_node = node;
nod_ptr->id = node;
}
library: readstat redesigned using 'stack' vs. 'chain' In addition to that text shown below the line which is common to several commit messages, this patch contains several minor changes with lessor impact upon the API: . A call to procps_stat_read_jiffs() has been added to those jiffs functions carrying the 'fill' nomenclature to parallel like functions in some of our other files. . The #include header files are ordered alphabetically now, with all those <sys/??> types separately grouped. . Standard copyright boilerplate was added in .c file. . The header file follows the conventions of indenting (by 4 spaces) those parameters too lengthy for 1 line. ------------------------------------------------------ . The former 'chains' have now become 'stacks' without the 'next' pointer in each result struct. The pointers initially seemed to offer some flexibility with memory allocations and benefits for the library access logic. However, user access was always via displacement and a a statically allocated chain was cumbersome to define. . An enumerator ending in '_noop' will no longer serve as a fencepost delimiter. Rather, it has become a much more important and flexible user oriented tool. Adding one or more such 'items' in any items list passed into the library becomes the means of extending the 'stack' to also include user (not just library) data. Any such data is guaranteed to never be altered by the library. . Anticipating PID support, where many different types must be represented in a result structure, we'll adopt a common naming standard. And, while not every results structure currently needs to reflect disparate types a union will be employed so the same dot qualifier ('.') can be used consistently when accessing all such data. Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-07-21 10:30:00 +05:30
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
info->nodes.hist.n_inuse = info->nodes.total;
return info->nodes.hist.n_inuse;
#else
return 0;
#endif
} // end: stat_make_numa_hist
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
static int stat_read_failed (
struct stat_info *info)
{
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct hist_tic *sum_ptr, *cpu_ptr;
char buf[8192], *bp, *b;
int i, rc, size;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
unsigned long long llnum = 0;
if (info == NULL)
return -EINVAL;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if (!info->cpus.hist.n_alloc) {
info->cpus.hist.tics = calloc(NEWOLD_INCR, sizeof(struct hist_tic));
if (!(info->cpus.hist.tics))
return -ENOMEM;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
info->cpus.hist.n_alloc = NEWOLD_INCR;
info->cpus.hist.n_inuse = 0;
}
if (-1 == info->stat_fd && (info->stat_fd = open(STAT_FILE, O_RDONLY)) == -1)
return -errno;
if (lseek(info->stat_fd, 0L, SEEK_SET) == -1)
return -errno;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
for (;;) {
if ((size = read(info->stat_fd, buf, sizeof(buf)-1)) < 0) {
if (errno == EINTR || errno == EAGAIN)
continue;
return -errno;
}
break;
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if (size == 0) {
return -EIO;
}
buf[size] = '\0';
bp = buf;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
sum_ptr = &info->cpu_hist;
// remember summary from last time around
memcpy(&sum_ptr->old, &sum_ptr->new, sizeof(struct stat_jifs));
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
sum_ptr->id = STAT_SUMMARY_ID; // mark as summary
sum_ptr->numa_node = STAT_NODE_INVALID; // mark as invalid
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
// now value the cpu summary tics from line #1
if (8 > sscanf(bp, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu %llu"
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
, &sum_ptr->new.user, &sum_ptr->new.nice, &sum_ptr->new.system
, &sum_ptr->new.idle, &sum_ptr->new.iowait, &sum_ptr->new.irq
, &sum_ptr->new.sirq, &sum_ptr->new.stolen
, &sum_ptr->new.guest, &sum_ptr->new.gnice))
return -1;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
// let's not distort the deltas the first time thru ...
if (!info->stat_was_read)
memcpy(&sum_ptr->old, &sum_ptr->new, sizeof(struct stat_jifs));
i = 0;
reap_em_again:
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
cpu_ptr = info->cpus.hist.tics + i; // adapt to relocated if reap_em_again
do {
bp = 1 + strchr(bp, '\n');
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
// remember this cpu from last time around
memcpy(&cpu_ptr->old, &cpu_ptr->new, sizeof(struct stat_jifs));
// next can be overridden under 'stat_make_numa_hist'
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
cpu_ptr->numa_node = STAT_NODE_INVALID;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if (8 > (rc = sscanf(bp, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu %llu"
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
, &cpu_ptr->id
, &cpu_ptr->new.user, &cpu_ptr->new.nice, &cpu_ptr->new.system
, &cpu_ptr->new.idle, &cpu_ptr->new.iowait, &cpu_ptr->new.irq
, &cpu_ptr->new.sirq, &cpu_ptr->new.stolen
, &cpu_ptr->new.guest, &cpu_ptr->new.gnice))) {
int id_sav = cpu_ptr->id;
memmove(cpu_ptr, sum_ptr, sizeof(struct hist_tic));
cpu_ptr->id = id_sav;
break; // we must tolerate cpus taken offline
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
// let's not distort the deltas the first time thru ...
if (!info->stat_was_read)
memcpy(&cpu_ptr->old, &cpu_ptr->new, sizeof(struct stat_jifs));
++i;
++cpu_ptr;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
} while (i < info->cpus.hist.n_alloc);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if (i == info->cpus.hist.n_alloc && rc >= 8) {
info->cpus.hist.n_alloc += NEWOLD_INCR;
info->cpus.hist.tics = realloc(info->cpus.hist.tics, info->cpus.hist.n_alloc * sizeof(struct hist_tic));
if (!(info->cpus.hist.tics))
return -ENOMEM;
goto reap_em_again;
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
info->cpus.total = info->cpus.hist.n_inuse = i;
// remember sys_hist stuff from last time around
memcpy(&info->sys_hist.old, &info->sys_hist.new, sizeof(struct stat_data));
llnum = 0;
if ((b = strstr(bp, "intr ")))
sscanf(b, "intr %llu", &llnum);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
info->sys_hist.new.intr = llnum;
llnum = 0;
if ((b = strstr(bp, "ctxt ")))
sscanf(b, "ctxt %llu", &llnum);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
info->sys_hist.new.ctxt = llnum;
llnum = 0;
if ((b = strstr(bp, "btime ")))
sscanf(b, "btime %llu", &llnum);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
info->sys_hist.new.btime = llnum;
llnum = 0;
if ((b = strstr(bp, "processes ")))
sscanf(b, "processes %llu", &llnum);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
info->sys_hist.new.procs_created = llnum;
llnum = 0;
if ((b = strstr(bp, "procs_blocked ")))
sscanf(b, "procs_blocked %llu", &llnum);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
info->sys_hist.new.procs_blocked = llnum;
llnum = 0;
if ((b = strstr(bp, "procs_running ")))
sscanf(b, "procs_running %llu", &llnum);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
info->sys_hist.new.procs_running = llnum;
// let's not distort the deltas the first time thru ...
if (!info->stat_was_read) {
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
memcpy(&info->sys_hist.old, &info->sys_hist.new, sizeof(struct stat_data));
info->stat_was_read = 1;
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return 0;
} // end: stat_read_failed
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
/*
* stat_stacks_alloc():
*
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
* Allocate and initialize one or more stacks each of which is anchored in an
* associated context structure.
*
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
* All such stacks will have their result structures properly primed with
* 'items', while the result itself will be zeroed.
*
* Returns a stack_extent struct anchoring the 'heads' of each new stack.
*/
static struct stacks_extent *stat_stacks_alloc (
struct ext_support *this,
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
int maxstacks)
{
struct stacks_extent *p_blob;
struct stat_stack **p_vect;
struct stat_stack *p_head;
size_t vect_size, head_size, list_size, blob_size;
void *v_head, *v_list;
int i;
if (this == NULL || this->items == NULL)
return NULL;
if (maxstacks < 1)
return NULL;
vect_size = sizeof(void *) * maxstacks; // size of the addr vectors |
vect_size += sizeof(void *); // plus NULL addr delimiter |
head_size = sizeof(struct stat_stack); // size of that head struct |
list_size = sizeof(struct stat_result) * this->items->num; // any single results stack |
blob_size = sizeof(struct stacks_extent); // the extent anchor itself |
blob_size += vect_size; // plus room for addr vects |
blob_size += head_size * maxstacks; // plus room for head thing |
blob_size += list_size * maxstacks; // plus room for our stacks |
/* note: all of our memory is allocated in one single blob, facilitating a later free(). |
as a minimum, it is important that those result structures themselves always be |
contiguous within each stack since they are accessed through relative position. | */
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if (NULL == (p_blob = calloc(1, blob_size)))
return NULL;
p_blob->next = this->extents; // push this extent onto... |
this->extents = p_blob; // ...some existing extents |
p_vect = (void *)p_blob + sizeof(struct stacks_extent); // prime our vector pointer |
p_blob->stacks = p_vect; // set actual vectors start |
v_head = (void *)p_vect + vect_size; // prime head pointer start |
v_list = v_head + (head_size * maxstacks); // prime our stacks pointer |
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
for (i = 0; i < maxstacks; i++) {
p_head = (struct stat_stack *)v_head;
p_head->head = stat_itemize_stack((struct stat_result *)v_list, this->items->num, this->items->enums);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
p_blob->stacks[i] = p_head;
v_list += list_size;
v_head += head_size;
}
p_blob->ext_numstacks = maxstacks;
return p_blob;
} // end: stat_stacks_alloc
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
static int stat_stacks_fetch (
struct stat_info *info,
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct reap_support *this)
{
#define n_alloc this->n_alloc
#define n_inuse this->hist.n_inuse
#define n_saved this->n_alloc_save
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
struct stacks_extent *ext;
int i;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if (this == NULL)
return -EINVAL;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
// initialize stuff -----------------------------------
if (!this->anchor) {
if (!(this->anchor = calloc(sizeof(void *), STACKS_INCR)))
return -ENOMEM;
n_alloc = STACKS_INCR;
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if (!this->fetch.extents) {
if (!(ext = stat_stacks_alloc(&this->fetch, n_alloc)))
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return -ENOMEM;
memcpy(this->anchor, ext->stacks, sizeof(void *) * n_alloc);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
}
if (this->fetch.dirty_stacks)
stat_cleanup_stacks_all(&this->fetch);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
// iterate stuff --------------------------------------
for (i = 0; i < n_inuse; i++) {
if (!(i < n_alloc)) {
n_alloc += STACKS_INCR;
if ((!(this->anchor = realloc(this->anchor, sizeof(void *) * n_alloc)))
|| (!(ext = stat_stacks_alloc(&this->fetch, STACKS_INCR)))) {
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return -ENOMEM;
}
memcpy(this->anchor + i, ext->stacks, sizeof(void *) * STACKS_INCR);
}
stat_assign_results(this->anchor[i], &info->sys_hist, &this->hist.tics[i]);
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
// finalize stuff -------------------------------------
/* note: we go to this trouble of maintaining a duplicate of the consolidated |
extent stacks addresses represented as our 'anchor' since these ptrs |
are exposed to a user (um, not that we don't trust 'em or anything). |
plus, we can NULL delimit these ptrs which we couldn't do otherwise. | */
if (n_saved < i + 1) {
n_saved = i + 1;
if (!(this->result.stacks = realloc(this->result.stacks, sizeof(void *) * n_saved)))
return -ENOMEM;
}
memcpy(this->result.stacks, this->anchor, sizeof(void *) * i);
this->result.stacks[i] = NULL;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
this->result.total = i;
this->fetch.dirty_stacks = 1;
// callers beware, this might be zero (maybe no libnuma.so) ...
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return this->result.total;
#undef n_alloc
#undef n_inuse
#undef n_saved
} // end: stat_stacks_fetch
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
static int stat_stacks_reconfig_maybe (
struct ext_support *this,
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
enum stat_item *items,
int numitems)
{
if (stat_items_check_failed(numitems, items))
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return -EINVAL;
/* is this the first time or have things changed since we were last called?
if so, gotta' redo all of our stacks stuff ... */
if (this->items->num != numitems + 1
|| memcmp(this->items->enums, items, sizeof(enum stat_item) * numitems)) {
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
// allow for our STAT_logical_end
if (!(this->items->enums = realloc(this->items->enums, sizeof(enum stat_item) * (numitems + 1))))
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return -ENOMEM;
memcpy(this->items->enums, items, sizeof(enum stat_item) * numitems);
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
this->items->enums[numitems] = STAT_logical_end;
this->items->num = numitems + 1;
stat_extents_free_all(this);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return 1;
}
return 0;
} // end: stat_stacks_reconfig_maybe
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
static struct stat_stack *stat_update_single_stack (
struct stat_info *info,
struct ext_support *this)
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
{
if (!this->extents
&& !(stat_stacks_alloc(this, 1)))
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return NULL;
if (this->dirty_stacks)
stat_cleanup_stacks_all(this);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
stat_assign_results(this->extents->stacks[0], &info->sys_hist, &info->cpu_hist);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
this->dirty_stacks = 1;
return this->extents->stacks[0];
} // end: stat_update_single_stack
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#if defined(PRETEND_NUMA) && defined(NUMA_DISABLE)
# warning 'PRETEND_NUMA' ignored, 'NUMA_DISABLE' is active
#endif
// ___ Public Functions |||||||||||||||||||||||||||||||||||||||||||||||||||||||
library: more tweaks for code and/or comments, 3rd gen Following is a summary of significant changes (if any) to each of these now upgraded 3rd gen library modules. <meminfo> ............................................ . eliminated duplicate decl of 'struct procps_meminfo' . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . how did i miss relocating all these friggin' #undefs . cleanup 'get' return logic (remove a redundant 'if') <pids> ............................................... . repositioned the procps_pidsinfo structure in header . removed the extra trailing comma from enum pids_item . standardized/normalized results struct union members <slabinfo> ........................................... . corrected comment typo (jeeze, in an 'aligned' para) . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . removed an obsolete #undef from procps_slabinfo_sort . cleanup 'get' return logic (remove a redundant 'if') <stat> ............................................... . how did i miss relocating all these friggin' #undefs . corrected an initialization fencepost used with numa <=== see Craig, here's a bug fix . removed the extra trailing comma from enum stat_item . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . strengthen those parm checks in procps_stat_get func . cleanup 'get' return logic (remove a redundant 'if') <vmstat> ............................................. . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . cleanup 'get' return logic (remove a redundant 'if') [ virtually all of these tweaks reflect the author's ] [ continuing pursuit of an unreasonable goal -- that ] [ of a 'perfect' (plus 'pretty') C language program! ] Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-14 10:30:00 +05:30
// --- standard required functions --------------------------------------------
/*
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
* procps_stat_new:
*
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
* Create a new container to hold the stat information
*
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
* The initial refcount is 1, and needs to be decremented
* to release the resources of the structure.
*
* Returns: < 0 on failure, 0 on success along with
* a pointer to a new context struct
*/
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
PROCPS_EXPORT int procps_stat_new (
struct stat_info **info)
{
struct stat_info *p;
int rc;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if (info == NULL || *info != NULL)
return -EINVAL;
if (!(p = calloc(1, sizeof(struct stat_info))))
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return -ENOMEM;
library: readstat redesigned using 'stack' vs. 'chain' In addition to that text shown below the line which is common to several commit messages, this patch contains several minor changes with lessor impact upon the API: . A call to procps_stat_read_jiffs() has been added to those jiffs functions carrying the 'fill' nomenclature to parallel like functions in some of our other files. . The #include header files are ordered alphabetically now, with all those <sys/??> types separately grouped. . Standard copyright boilerplate was added in .c file. . The header file follows the conventions of indenting (by 4 spaces) those parameters too lengthy for 1 line. ------------------------------------------------------ . The former 'chains' have now become 'stacks' without the 'next' pointer in each result struct. The pointers initially seemed to offer some flexibility with memory allocations and benefits for the library access logic. However, user access was always via displacement and a a statically allocated chain was cumbersome to define. . An enumerator ending in '_noop' will no longer serve as a fencepost delimiter. Rather, it has become a much more important and flexible user oriented tool. Adding one or more such 'items' in any items list passed into the library becomes the means of extending the 'stack' to also include user (not just library) data. Any such data is guaranteed to never be altered by the library. . Anticipating PID support, where many different types must be represented in a result structure, we'll adopt a common naming standard. And, while not every results structure currently needs to reflect disparate types a union will be employed so the same dot qualifier ('.') can be used consistently when accessing all such data. Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-07-21 10:30:00 +05:30
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
p->refcount = 1;
p->stat_fd = -1;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
p->results.cpus = &p->cpus.result;
p->results.nodes = &p->nodes.result;
p->cpus.total = procps_cpu_count();
// these 3 are for reap, sharing a single set of items
p->cpu_summary.items = p->cpus.fetch.items = p->nodes.fetch.items = &p->reap_items;
// the select guy has its own set of items
p->select.items = &p->select_items;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#ifndef NUMA_DISABLE
#ifndef PRETEND_NUMA
// we'll try for the most recent version, then a version we know works...
if ((p->libnuma_handle = dlopen("libnuma.so", RTLD_LAZY))
|| (p->libnuma_handle = dlopen("libnuma.so.1", RTLD_LAZY))) {
p->our_max_node = dlsym(p->libnuma_handle, "numa_max_node");
p->our_node_of_cpu = dlsym(p->libnuma_handle, "numa_node_of_cpu");
if (p->our_max_node == NULL
|| (p->our_node_of_cpu == NULL)) {
// this dlclose is safe - we've yet to call numa_node_of_cpu
// ( there's one other dlclose which has now been disabled )
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
dlclose(p->libnuma_handle);
p->libnuma_handle = NULL;
}
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#else
p->libnuma_handle = (void *)-1;
p->our_max_node = fake_max_node;
p->our_node_of_cpu = fake_node_of_cpu;
#endif
#endif
/* do a priming read here for the following potential benefits: |
1) ensure there will be no problems with subsequent access |
2) make delta results potentially useful, even if 1st time | */
if ((rc = stat_read_failed(p))) {
procps_stat_unref(&p);
return rc;
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
*info = p;
return 0;
} // end :procps_stat_new
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
PROCPS_EXPORT int procps_stat_ref (
struct stat_info *info)
{
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if (info == NULL)
return -EINVAL;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
info->refcount++;
return info->refcount;
} // end: procps_stat_ref
PROCPS_EXPORT int procps_stat_unref (
struct stat_info **info)
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
{
if (info == NULL || *info == NULL)
return -EINVAL;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
(*info)->refcount--;
if ((*info)->refcount == 0) {
if ((*info)->cpus.anchor)
free((*info)->cpus.anchor);
if ((*info)->cpus.result.stacks)
free((*info)->cpus.result.stacks);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if ((*info)->cpus.hist.tics)
free((*info)->cpus.hist.tics);
if ((*info)->cpus.fetch.extents)
stat_extents_free_all(&(*info)->cpus.fetch);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if ((*info)->nodes.anchor)
free((*info)->nodes.anchor);
if ((*info)->nodes.result.stacks)
free((*info)->nodes.result.stacks);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if ((*info)->nodes.hist.tics)
free((*info)->nodes.hist.tics);
if ((*info)->nodes.fetch.extents)
stat_extents_free_all(&(*info)->nodes.fetch);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if ((*info)->cpu_summary.extents)
stat_extents_free_all(&(*info)->cpu_summary);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if ((*info)->select.extents)
stat_extents_free_all(&(*info)->select);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if ((*info)->reap_items.enums)
free((*info)->reap_items.enums);
if ((*info)->select_items.enums)
free((*info)->select_items.enums);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#ifndef NUMA_DISABLE
#ifndef PRETEND_NUMA
/* note: we'll skip a dlcose() to avoid the following libnuma memory
* leak which is triggered after a call to numa_node_of_cpu():
* ==1234== LEAK SUMMARY:
* ==1234== definitely lost: 512 bytes in 1 blocks
* ==1234== indirectly lost: 48 bytes in 2 blocks
* ==1234== ...
* [ thanks very much libnuma, for all the pain you've caused ]
*/
// if ((*info)->libnuma_handle)
// dlclose((*info)->libnuma_handle);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
#endif
#endif
free(*info);
*info = NULL;
return 0;
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return (*info)->refcount;
} // end: procps_stat_unref
library: more tweaks for code and/or comments, 3rd gen Following is a summary of significant changes (if any) to each of these now upgraded 3rd gen library modules. <meminfo> ............................................ . eliminated duplicate decl of 'struct procps_meminfo' . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . how did i miss relocating all these friggin' #undefs . cleanup 'get' return logic (remove a redundant 'if') <pids> ............................................... . repositioned the procps_pidsinfo structure in header . removed the extra trailing comma from enum pids_item . standardized/normalized results struct union members <slabinfo> ........................................... . corrected comment typo (jeeze, in an 'aligned' para) . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . removed an obsolete #undef from procps_slabinfo_sort . cleanup 'get' return logic (remove a redundant 'if') <stat> ............................................... . how did i miss relocating all these friggin' #undefs . corrected an initialization fencepost used with numa <=== see Craig, here's a bug fix . removed the extra trailing comma from enum stat_item . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . strengthen those parm checks in procps_stat_get func . cleanup 'get' return logic (remove a redundant 'if') <vmstat> ............................................. . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . cleanup 'get' return logic (remove a redundant 'if') [ virtually all of these tweaks reflect the author's ] [ continuing pursuit of an unreasonable goal -- that ] [ of a 'perfect' (plus 'pretty') C language program! ] Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-14 10:30:00 +05:30
// --- variable interface functions -------------------------------------------
PROCPS_EXPORT struct stat_result *procps_stat_get (
struct stat_info *info,
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
enum stat_item item)
{
static time_t sav_secs;
time_t cur_secs;
library: more tweaks for code and/or comments, 3rd gen Following is a summary of significant changes (if any) to each of these now upgraded 3rd gen library modules. <meminfo> ............................................ . eliminated duplicate decl of 'struct procps_meminfo' . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . how did i miss relocating all these friggin' #undefs . cleanup 'get' return logic (remove a redundant 'if') <pids> ............................................... . repositioned the procps_pidsinfo structure in header . removed the extra trailing comma from enum pids_item . standardized/normalized results struct union members <slabinfo> ........................................... . corrected comment typo (jeeze, in an 'aligned' para) . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . removed an obsolete #undef from procps_slabinfo_sort . cleanup 'get' return logic (remove a redundant 'if') <stat> ............................................... . how did i miss relocating all these friggin' #undefs . corrected an initialization fencepost used with numa <=== see Craig, here's a bug fix . removed the extra trailing comma from enum stat_item . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . strengthen those parm checks in procps_stat_get func . cleanup 'get' return logic (remove a redundant 'if') <vmstat> ............................................. . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . cleanup 'get' return logic (remove a redundant 'if') [ virtually all of these tweaks reflect the author's ] [ continuing pursuit of an unreasonable goal -- that ] [ of a 'perfect' (plus 'pretty') C language program! ] Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-14 10:30:00 +05:30
if (info == NULL)
return NULL;
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
if (item < 0 || item >= STAT_logical_end)
return NULL;
library: more tweaks for code and/or comments, 3rd gen Following is a summary of significant changes (if any) to each of these now upgraded 3rd gen library modules. <meminfo> ............................................ . eliminated duplicate decl of 'struct procps_meminfo' . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . how did i miss relocating all these friggin' #undefs . cleanup 'get' return logic (remove a redundant 'if') <pids> ............................................... . repositioned the procps_pidsinfo structure in header . removed the extra trailing comma from enum pids_item . standardized/normalized results struct union members <slabinfo> ........................................... . corrected comment typo (jeeze, in an 'aligned' para) . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . removed an obsolete #undef from procps_slabinfo_sort . cleanup 'get' return logic (remove a redundant 'if') <stat> ............................................... . how did i miss relocating all these friggin' #undefs . corrected an initialization fencepost used with numa <=== see Craig, here's a bug fix . removed the extra trailing comma from enum stat_item . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . strengthen those parm checks in procps_stat_get func . cleanup 'get' return logic (remove a redundant 'if') <vmstat> ............................................. . standardized/normalized results struct union members . added 'std' & 'var' dividers in .c file, like <pids> . cleanup 'get' return logic (remove a redundant 'if') [ virtually all of these tweaks reflect the author's ] [ continuing pursuit of an unreasonable goal -- that ] [ of a 'perfect' (plus 'pretty') C language program! ] Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-14 10:30:00 +05:30
/* we will NOT read the source file with every call - rather, we'll offer
a granularity of 1 second between reads ... */
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
cur_secs = time(NULL);
if (1 <= cur_secs - sav_secs) {
if (stat_read_failed(info))
return NULL;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
sav_secs = cur_secs;
}
info->get_this.item = item;
// with 'get', we must NOT honor the usual 'noop' guarantee
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
// if (item > STAT_noop)
info->get_this.result.ull_int = 0;
Item_table[item].setsfunc(&info->get_this, &info->sys_hist, &info->cpu_hist);
return &info->get_this;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
} // end: procps_stat_get
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
/* procps_stat_reap():
*
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
* Harvest all the requested NUMA NODE and/or CPU information providing the
* result stacks along with totals and the cpu summary.
*
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
* Returns: pointer to a stat_reaped struct on success, NULL on error.
*/
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
PROCPS_EXPORT struct stat_reaped *procps_stat_reap (
struct stat_info *info,
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
enum stat_reap_type what,
enum stat_item *items,
int numitems)
{
int rc;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if (info == NULL || items == NULL)
return NULL;
if (what != STAT_REAP_CPUS_ONLY && what != STAT_REAP_CPUS_AND_NODES)
return NULL;
#ifdef ENFORCE_LOGICAL
{ int i;
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
// those STAT_SYS_type enum's make sense only to 'select' ...
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
for (i = 0; i < numitems; i++) {
library: removed all the 'PROCPS_' enumerator prefixes Many of our item enumerator identifiers are very long, especially in that <VMSTAT> module. Additionally, they all contain the exact same universal 'PROCPS_' prefix. The origins for this are likely found in the desire to avoid name clashes with other potential include files. But with procps-ng newlib, we've probably gone way too far. Did 'PROCPS_PIDS_TICS_SYSTEM' actually offer more protection against clash than 'PIDS_TICS_SYSTEM' does? I don't think so. Besides, no matter how big that name becomes, one can never guarantee they'll never be some clash. And, conversely, extremely short names will not always create conflict. Of course, in either case when some clash occurs, one can always #undef that problem. Thus, this commit will eliminate that 'PROCPS_' prefix making all of those enum identifiers a little shorter. And, we'll still be well above some ridiculously short (criminally short) names found in some common headers: - - - - - - - - - - <term.h> - 'tab', 'TTY', etc - - - - - - - - - - - - - - - - <search.h> - 'ENTER', ENTRY', 'FIND', etc ------------------------------------------------------ Finally, with this as a last of the wholesale changes, we will have established the naming conventions below: . only functions will begin with that 'procps_' prefix . exposed structures begin with the module/header name . item enumerators begin like structs, but capitalized . other enumerators work exactly like item enumerators . macros and constants begin just like the enumerators ------------------------------------------------------ Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-21 10:30:00 +05:30
if (items[i] > STAT_TIC_highest)
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return NULL;
}
}
#endif
if (0 > (rc = stat_stacks_reconfig_maybe(&info->cpu_summary, items, numitems)))
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return NULL;
if (rc) {
stat_extents_free_all(&info->cpus.fetch);
stat_extents_free_all(&info->nodes.fetch);
}
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
if (stat_read_failed(info))
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return NULL;
info->results.summary = stat_update_single_stack(info, &info->cpu_summary);
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
/* unlike the other 'reap' functions, <stat> provides for two separate |
stacks pointer arrays exposed to callers. Thus, to keep our promise |
of NULL delimit we must ensure a minimal array for the optional one | */
if (!info->nodes.result.stacks
&& (!(info->nodes.result.stacks = malloc(sizeof(void *)))))
return NULL;
info->nodes.result.total = 0;
info->nodes.result.stacks[0] = NULL;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
switch (what) {
case STAT_REAP_CPUS_ONLY:
if (!stat_stacks_fetch(info, &info->cpus))
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return NULL;
break;
case STAT_REAP_CPUS_AND_NODES:
#ifndef NUMA_DISABLE
/* note: if we are doing numa at all, we must call stat_make_numa_hist |
before we build (fetch) the cpu stacks since the read_stat guy |
will have marked (temporarily) all the cpu node ids as invalid | */
if (0 > stat_make_numa_hist(info))
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
return NULL;
// tolerate an unexpected absence of libnuma.so ...
stat_stacks_fetch(info, &info->nodes);
#endif
if (!stat_stacks_fetch(info, &info->cpus))
return NULL;
library: improve/standardize one interface, <STAT> api This commit represents a complete redesign of the stat interface. Gone are the confusing 8 separate accessors along with their 2 additional read functions. In their place we have just 3 accessors, with no read required. That old interface also suffered an inflexibility with respect to structures. Now we deal with an unchanging standard 'result' struct enabling future changes where the binary interface will no longer need to be broken. And gone is that former unnecessary typedef, used when dealing with jiffies. Now the standard C type is used. Our new API also adds some brand new functionality. If a caller plans to employ successive 'select' or 'reap' invocations, then delta values are available (which is actually only what that top program is interested in). At some future point a 'sort' function could be easily introduced to complement the 'reap' function. However, I saw no need for it at present and so it was omitted. There were several design decisions which everyone may not agree with. In support I'll offer these rationals: . The 'get' function returns a signed long long result which means a potential loss of some significance. But I felt the ability to distinguish actual errors (minus values) from true zero results were worth such a risk. . The DELTA item enumerators were also made signed and smaller than their parents. And they are intentionally grouped as last so as to emphasize those distinctions. . The SYS type items were excluded from the new 'reap' function. It would not make sense to duplicate them in each results stack. They're limited to 'get'/'select'. . By the same token, some items (DELTA, etc.) will not be allowed under that 'get' routine. That function was already open to significant internal overhead (through subsequent calls like in vmstat.c). That is why it has been limited via 1 second between reads of /proc/stat. Lastly, when we finally get around to documenting this interface there's a real potential toe stubber when it comes to the numa node portion. The libnuma.so doesn't really provide any means to retrieve the active nodes. Thus, any total reported by <stat> is just the highest node number plus one, as reported by the numa library. Any unused/inactive nodes are identified through these . PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID By the same token after the STAT_REAP_CPUS_ONLY 'reap' . PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID Reference(s): http://www.freelists.org/post/procps/newlib-stat-interface Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-05-06 10:30:00 +05:30
break;
default:
return NULL;
};
return &info->results;
} // end: procps_stat_reap
/* procps_stat_select():
*
* Harvest all the requested TIC and/or SYS information then return
* it in a results stack.
*
* Returns: pointer to a stat_stack struct on success, NULL on error.
*/
PROCPS_EXPORT struct stat_stack *procps_stat_select (
struct stat_info *info,
enum stat_item *items,
int numitems)
{
if (info == NULL || items == NULL)
return NULL;
if (0 > stat_stacks_reconfig_maybe(&info->select, items, numitems))
return NULL;
if (stat_read_failed(info))
return NULL;
return stat_update_single_stack(info, &info->select);
} // end: procps_stat_select
/*
* procps_stat_sort():
*
* Sort stacks anchored in the passed stack pointers array
* based on the designated sort enumerator and specified order.
*
* Returns those same addresses sorted.
*
* Note: all of the stacks must be homogeneous (of equal length and content).
*/
PROCPS_EXPORT struct stat_stack **procps_stat_sort (
struct stat_info *info,
struct stat_stack *stacks[],
int numstacked,
enum stat_item sortitem,
enum stat_sort_order order)
{
struct stat_result *p;
struct sort_parms parms;
int offset;
if (info == NULL || stacks == NULL)
return NULL;
// a stat_item is currently unsigned, but we'll protect our future
if (sortitem < 0 || sortitem >= STAT_logical_end)
return NULL;
if (order != STAT_SORT_ASCEND && order != STAT_SORT_DESCEND)
return NULL;
if (numstacked < 2)
return stacks;
offset = 0;
p = stacks[0]->head;
for (;;) {
if (p->item == sortitem)
break;
++offset;
if (p->item >= STAT_logical_end)
return NULL;
++p;
}
parms.offset = offset;
parms.order = order;
qsort_r(stacks, numstacked, sizeof(void *), (QSR_t)Item_table[p->item].sortfunc, &parms);
return stacks;
} // end: procps_stat_sort
// --- special debugging function(s) ------------------------------------------
/*
* The following isn't part of the normal programming interface. Rather,
* it exists to validate result types referenced in application programs.
*
* It's used only when:
* 1) the 'XTRA_PROCPS_DEBUG' has been defined, or
* 2) the '#include <proc/xtra-procps-debug.h>' used
*/
PROCPS_EXPORT struct stat_result *xtra_stat_get (
struct stat_info *info,
enum stat_item actual_enum,
const char *typestr,
const char *file,
int lineno)
{
struct stat_result *r = procps_stat_get(info, actual_enum);
if (actual_enum < 0 || actual_enum >= STAT_logical_end) {
fprintf(stderr, "%s line %d: invalid item = %d, type = %s\n"
, file, lineno, actual_enum, typestr);
}
if (r) {
char *str = Item_table[r->item].type2str;
if (str[0]
&& (strcmp(typestr, str)))
fprintf(stderr, "%s line %d: was %s, expected %s\n", file, lineno, typestr, str);
}
return r;
} // end: xtra_stat_get_
PROCPS_EXPORT struct stat_result *xtra_stat_val (
int relative_enum,
const char *typestr,
const struct stat_stack *stack,
struct stat_info *info,
const char *file,
int lineno)
{
char *str;
int i;
for (i = 0; stack->head[i].item < STAT_logical_end; i++)
;
if (relative_enum < 0 || relative_enum >= i) {
fprintf(stderr, "%s line %d: invalid relative_enum = %d, type = %s\n"
, file, lineno, relative_enum, typestr);
return NULL;
}
str = Item_table[stack->head[relative_enum].item].type2str;
if (str[0]
&& (strcmp(typestr, str))) {
fprintf(stderr, "%s line %d: was %s, expected %s\n", file, lineno, typestr, str);
}
return &stack->head[relative_enum];
} // end: xtra_stat_val