procps/proc/vmstat.c

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library: vmstat redesign now 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: . Standard copyright boilerplate was added in .c file. . The #include header files are ordered alphabetically now, with all those <sys/??> types separately grouped. . 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
*
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
* Copyright (C) 1995 Martin Schulze <joey@infodrom.north.de>
* Copyright (C) 1996 Charles Blake <cblake@bbn.com>
* Copyright (C) 2003 Albert Cahalan
* Copyright (C) 2015 Craig Small <csmall@enc.com.au>
* Copyright (C) 2016 Jim Warner <james.warner@comcast.net>
*
library: vmstat redesign now 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: . Standard copyright boilerplate was added in .c file. . The #include header files are ordered alphabetically now, with all those <sys/??> types separately grouped. . 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
* 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
*/
#include <errno.h>
library: vmstat redesign now 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: . Standard copyright boilerplate was added in .c file. . The #include header files are ordered alphabetically now, with all those <sys/??> types separately grouped. . 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 <fcntl.h>
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
#include <search.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
#include <time.h>
#include <unistd.h>
library: vmstat redesign now 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: . Standard copyright boilerplate was added in .c file. . The #include header files are ordered alphabetically now, with all those <sys/??> types separately grouped. . 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/stat.h>
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
#include <sys/types.h>
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
#include <proc/procps-private.h>
#include <proc/vmstat.h>
#define VMSTAT_FILE "/proc/vmstat"
#define VMSTAT_BUFF 8192
/*
* Perhaps someday we'll all learn what is in these fields. But |
* that might require available linux documentation progressing |
* beyond a state that was acknowledged in the following thread |
*
* http://www.spinics.net/lists/linux-man/msg09096.html
*/
struct vmstat_data {
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long allocstall_dma;
unsigned long allocstall_dma32;
unsigned long allocstall_high;
unsigned long allocstall_movable;
unsigned long allocstall_normal;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long balloon_deflate;
unsigned long balloon_inflate;
unsigned long balloon_migrate;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long compact_daemon_free_scanned;
unsigned long compact_daemon_migrate_scanned;
unsigned long compact_daemon_wake;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long compact_fail;
unsigned long compact_free_scanned;
unsigned long compact_isolated;
unsigned long compact_migrate_scanned;
unsigned long compact_stall;
unsigned long compact_success;
unsigned long drop_pagecache;
unsigned long drop_slab;
unsigned long htlb_buddy_alloc_fail;
unsigned long htlb_buddy_alloc_success;
unsigned long kswapd_high_wmark_hit_quickly;
unsigned long kswapd_inodesteal;
unsigned long kswapd_low_wmark_hit_quickly;
unsigned long nr_active_anon;
unsigned long nr_active_file;
unsigned long nr_anon_pages;
unsigned long nr_anon_transparent_hugepages;
unsigned long nr_bounce;
unsigned long nr_dirtied;
unsigned long nr_dirty;
unsigned long nr_dirty_background_threshold;
unsigned long nr_dirty_threshold;
unsigned long nr_file_pages;
unsigned long nr_free_cma;
unsigned long nr_free_pages;
unsigned long nr_inactive_anon;
unsigned long nr_inactive_file;
unsigned long nr_isolated_anon;
unsigned long nr_isolated_file;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long nr_kernel_misc_reclaimable;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long nr_kernel_stack;
unsigned long nr_mapped;
unsigned long nr_mlock;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long nr_page_table_pages;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long nr_shmem;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long nr_shmem_hugepages;
unsigned long nr_shmem_pmdmapped;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long nr_slab_reclaimable;
unsigned long nr_slab_unreclaimable;
unsigned long nr_unevictable;
unsigned long nr_unstable;
unsigned long nr_vmscan_immediate_reclaim;
unsigned long nr_vmscan_write;
unsigned long nr_writeback;
unsigned long nr_writeback_temp;
unsigned long nr_written;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long nr_zone_active_anon;
unsigned long nr_zone_active_file;
unsigned long nr_zone_inactive_anon;
unsigned long nr_zone_inactive_file;
unsigned long nr_zone_unevictable;
unsigned long nr_zone_write_pending;
unsigned long nr_zspages;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long numa_foreign;
unsigned long numa_hint_faults;
unsigned long numa_hint_faults_local;
unsigned long numa_hit;
unsigned long numa_huge_pte_updates;
unsigned long numa_interleave;
unsigned long numa_local;
unsigned long numa_miss;
unsigned long numa_other;
unsigned long numa_pages_migrated;
unsigned long numa_pte_updates;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long oom_kill;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long pageoutrun;
unsigned long pgactivate;
unsigned long pgalloc_dma;
unsigned long pgalloc_dma32;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long pgalloc_high;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long pgalloc_movable;
unsigned long pgalloc_normal;
unsigned long pgdeactivate;
unsigned long pgfault;
unsigned long pgfree;
unsigned long pginodesteal;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long pglazyfree;
unsigned long pglazyfreed;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long pgmajfault;
unsigned long pgmigrate_fail;
unsigned long pgmigrate_success;
unsigned long pgpgin;
unsigned long pgpgout;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long pgrefill;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long pgrotated;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long pgscan_direct;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long pgscan_direct_throttle;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long pgscan_kswapd;
unsigned long pgskip_dma;
unsigned long pgskip_dma32;
unsigned long pgskip_high;
unsigned long pgskip_movable;
unsigned long pgskip_normal;
unsigned long pgsteal_direct;
unsigned long pgsteal_kswapd;
unsigned long pswpin;
unsigned long pswpout;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long slabs_scanned;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long swap_ra;
unsigned long swap_ra_hit;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long thp_collapse_alloc;
unsigned long thp_collapse_alloc_failed;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long thp_deferred_split_page;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long thp_fault_alloc;
unsigned long thp_fault_fallback;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long thp_file_alloc;
unsigned long thp_file_mapped;
unsigned long thp_split_page;
unsigned long thp_split_page_failed;
unsigned long thp_split_pmd;
unsigned long thp_split_pud;
unsigned long thp_swpout;
unsigned long thp_swpout_fallback;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long thp_zero_page_alloc;
unsigned long thp_zero_page_alloc_failed;
unsigned long unevictable_pgs_cleared;
unsigned long unevictable_pgs_culled;
unsigned long unevictable_pgs_mlocked;
unsigned long unevictable_pgs_munlocked;
unsigned long unevictable_pgs_rescued;
unsigned long unevictable_pgs_scanned;
unsigned long unevictable_pgs_stranded;
unsigned long workingset_activate;
unsigned long workingset_nodereclaim;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long workingset_nodes;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long workingset_refault;
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
unsigned long workingset_restore;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
unsigned long zone_reclaim_failed;
};
struct vmstat_hist {
struct vmstat_data new;
struct vmstat_data old;
};
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
struct stacks_extent {
int ext_numstacks;
struct stacks_extent *next;
struct vmstat_stack **stacks;
};
struct vmstat_info {
int refcount;
int vmstat_fd;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
struct vmstat_hist hist;
int numitems;
enum vmstat_item *items;
struct stacks_extent *extents;
struct hsearch_data hashtab;
struct vmstat_result get_this;
};
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
// ___ Results 'Set' Support ||||||||||||||||||||||||||||||||||||||||||||||||||
#define setNAME(e) set_vmstat_ ## e
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
#define setDECL(e) static void setNAME(e) \
(struct vmstat_result *R, struct vmstat_hist *H)
// regular assignment
#define REG_set(e,x) setDECL(e) { R->result.ul_int = H->new. x; }
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
// delta assignment
#define HST_set(e,x) setDECL(e) { R->result.sl_int = ( H->new. x - H->old. x ); }
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
library: minimize the use of 'cleanup_stacks' routines Some parts of our newlib implementation are the result of functions which have been propagated from module to module. In particular, those 'cleanup_stacks' routines are all similar & likely originated in the <pids> api. In that interface there was a need to free dynamically acquired memory before the result structure was reused to satisfy subsequent 'get', 'select' or 'reap' calls. This, in turn, led to a concept of 'dirty' stacks with the need to call one of two 'cleanup_stack' functions. None of the remaining interfaces deal with such memory yet they each had their own 'cleanup_stack' functions. Those functions were responsible for resetting each of the result unions to zero, excluding any 'noop' items. The bottom line is that for all interfaces, repetitive calls would require iterating through the stack(s) two separate times: once to 'cleanup' another to 'assign'. With this commit we will reduce iterations to just the 'assign' routine. A reset to zero will be accomplished in the 'extra' item set routine (which is the only one actually requiring any reset). All other items will be reinitialized automatically by a new current set value or upon reallocation when an items compliment changes. In the <pids> interface, any freeing of dynamic memory could have been accomplished by adding that 'freefunc' check to the 'assign' function. However, that requires an Item_table test with every item. Instead, we'll now satisfy such needs as the very first step in those set functions responsible for dynamically acquired memory. [ the <pids> api retains 2 'cleanup_stack' functions ] [ to accommodate stack(s) 'reset' & to serve 'unref' ] Lastly, all the 'itemize_stack' functions were tweaked by eliminating an unnecessary initialization of result unions. That objective was already accomplished by the calloc() in a 'stacks_alloc' function or the remaining 'cleanup_stack' routine found in the <pids> interface. Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-05-22 10:30:00 +05:30
setDECL(noop) { (void)R; (void)H; }
setDECL(extra) { (void)H; R->result.ul_int = 0; }
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
REG_set(ALLOCSTALL_DMA, allocstall_dma)
REG_set(ALLOCSTALL_DMA32, allocstall_dma32)
REG_set(ALLOCSTALL_HIGH, allocstall_high)
REG_set(ALLOCSTALL_MOVABLE, allocstall_movable)
REG_set(ALLOCSTALL_NORMAL, allocstall_normal)
REG_set(BALLOON_DEFLATE, balloon_deflate)
REG_set(BALLOON_INFLATE, balloon_inflate)
REG_set(BALLOON_MIGRATE, balloon_migrate)
REG_set(COMPACT_DAEMON_FREE_SCANNED, compact_daemon_free_scanned)
REG_set(COMPACT_DAEMON_MIGRATE_SCANNED, compact_daemon_migrate_scanned)
REG_set(COMPACT_DAEMON_WAKE, compact_daemon_wake)
REG_set(COMPACT_FAIL, compact_fail)
REG_set(COMPACT_FREE_SCANNED, compact_free_scanned)
REG_set(COMPACT_ISOLATED, compact_isolated)
REG_set(COMPACT_MIGRATE_SCANNED, compact_migrate_scanned)
REG_set(COMPACT_STALL, compact_stall)
REG_set(COMPACT_SUCCESS, compact_success)
REG_set(DROP_PAGECACHE, drop_pagecache)
REG_set(DROP_SLAB, drop_slab)
REG_set(HTLB_BUDDY_ALLOC_FAIL, htlb_buddy_alloc_fail)
REG_set(HTLB_BUDDY_ALLOC_SUCCESS, htlb_buddy_alloc_success)
REG_set(KSWAPD_HIGH_WMARK_HIT_QUICKLY, kswapd_high_wmark_hit_quickly)
REG_set(KSWAPD_INODESTEAL, kswapd_inodesteal)
REG_set(KSWAPD_LOW_WMARK_HIT_QUICKLY, kswapd_low_wmark_hit_quickly)
REG_set(NR_ACTIVE_ANON, nr_active_anon)
REG_set(NR_ACTIVE_FILE, nr_active_file)
REG_set(NR_ANON_PAGES, nr_anon_pages)
REG_set(NR_ANON_TRANSPARENT_HUGEPAGES, nr_anon_transparent_hugepages)
REG_set(NR_BOUNCE, nr_bounce)
REG_set(NR_DIRTIED, nr_dirtied)
REG_set(NR_DIRTY, nr_dirty)
REG_set(NR_DIRTY_BACKGROUND_THRESHOLD, nr_dirty_background_threshold)
REG_set(NR_DIRTY_THRESHOLD, nr_dirty_threshold)
REG_set(NR_FILE_PAGES, nr_file_pages)
REG_set(NR_FREE_CMA, nr_free_cma)
REG_set(NR_FREE_PAGES, nr_free_pages)
REG_set(NR_INACTIVE_ANON, nr_inactive_anon)
REG_set(NR_INACTIVE_FILE, nr_inactive_file)
REG_set(NR_ISOLATED_ANON, nr_isolated_anon)
REG_set(NR_ISOLATED_FILE, nr_isolated_file)
REG_set(NR_KERNEL_MISC_RECLAIMABLE, nr_kernel_misc_reclaimable)
REG_set(NR_KERNEL_STACK, nr_kernel_stack)
REG_set(NR_MAPPED, nr_mapped)
REG_set(NR_MLOCK, nr_mlock)
REG_set(NR_PAGE_TABLE_PAGES, nr_page_table_pages)
REG_set(NR_SHMEM, nr_shmem)
REG_set(NR_SHMEM_HUGEPAGES, nr_shmem_hugepages)
REG_set(NR_SHMEM_PMDMAPPED, nr_shmem_pmdmapped)
REG_set(NR_SLAB_RECLAIMABLE, nr_slab_reclaimable)
REG_set(NR_SLAB_UNRECLAIMABLE, nr_slab_unreclaimable)
REG_set(NR_UNEVICTABLE, nr_unevictable)
REG_set(NR_UNSTABLE, nr_unstable)
REG_set(NR_VMSCAN_IMMEDIATE_RECLAIM, nr_vmscan_immediate_reclaim)
REG_set(NR_VMSCAN_WRITE, nr_vmscan_write)
REG_set(NR_WRITEBACK, nr_writeback)
REG_set(NR_WRITEBACK_TEMP, nr_writeback_temp)
REG_set(NR_WRITTEN, nr_written)
REG_set(NR_ZONE_ACTIVE_ANON, nr_zone_active_anon)
REG_set(NR_ZONE_ACTIVE_FILE, nr_zone_active_file)
REG_set(NR_ZONE_INACTIVE_ANON, nr_zone_inactive_anon)
REG_set(NR_ZONE_INACTIVE_FILE, nr_zone_inactive_file)
REG_set(NR_ZONE_UNEVICTABLE, nr_zone_unevictable)
REG_set(NR_ZONE_WRITE_PENDING, nr_zone_write_pending)
REG_set(NR_ZSPAGES, nr_zspages)
REG_set(NUMA_FOREIGN, numa_foreign)
REG_set(NUMA_HINT_FAULTS, numa_hint_faults)
REG_set(NUMA_HINT_FAULTS_LOCAL, numa_hint_faults_local)
REG_set(NUMA_HIT, numa_hit)
REG_set(NUMA_HUGE_PTE_UPDATES, numa_huge_pte_updates)
REG_set(NUMA_INTERLEAVE, numa_interleave)
REG_set(NUMA_LOCAL, numa_local)
REG_set(NUMA_MISS, numa_miss)
REG_set(NUMA_OTHER, numa_other)
REG_set(NUMA_PAGES_MIGRATED, numa_pages_migrated)
REG_set(NUMA_PTE_UPDATES, numa_pte_updates)
REG_set(OOM_KILL, oom_kill)
REG_set(PAGEOUTRUN, pageoutrun)
REG_set(PGACTIVATE, pgactivate)
REG_set(PGALLOC_DMA, pgalloc_dma)
REG_set(PGALLOC_DMA32, pgalloc_dma32)
REG_set(PGALLOC_HIGH, pgalloc_high)
REG_set(PGALLOC_MOVABLE, pgalloc_movable)
REG_set(PGALLOC_NORMAL, pgalloc_normal)
REG_set(PGDEACTIVATE, pgdeactivate)
REG_set(PGFAULT, pgfault)
REG_set(PGFREE, pgfree)
REG_set(PGINODESTEAL, pginodesteal)
REG_set(PGLAZYFREE, pglazyfree)
REG_set(PGLAZYFREED, pglazyfreed)
REG_set(PGMAJFAULT, pgmajfault)
REG_set(PGMIGRATE_FAIL, pgmigrate_fail)
REG_set(PGMIGRATE_SUCCESS, pgmigrate_success)
REG_set(PGPGIN, pgpgin)
REG_set(PGPGOUT, pgpgout)
REG_set(PGREFILL, pgrefill)
REG_set(PGROTATED, pgrotated)
REG_set(PGSCAN_DIRECT, pgscan_direct)
REG_set(PGSCAN_DIRECT_THROTTLE, pgscan_direct_throttle)
REG_set(PGSCAN_KSWAPD, pgscan_kswapd)
REG_set(PGSKIP_DMA, pgskip_dma)
REG_set(PGSKIP_DMA32, pgskip_dma32)
REG_set(PGSKIP_HIGH, pgskip_high)
REG_set(PGSKIP_MOVABLE, pgskip_movable)
REG_set(PGSKIP_NORMAL, pgskip_normal)
REG_set(PGSTEAL_DIRECT, pgsteal_direct)
REG_set(PGSTEAL_KSWAPD, pgsteal_kswapd)
REG_set(PSWPIN, pswpin)
REG_set(PSWPOUT, pswpout)
REG_set(SLABS_SCANNED, slabs_scanned)
REG_set(SWAP_RA, swap_ra)
REG_set(SWAP_RA_HIT, swap_ra_hit)
REG_set(THP_COLLAPSE_ALLOC, thp_collapse_alloc)
REG_set(THP_COLLAPSE_ALLOC_FAILED, thp_collapse_alloc_failed)
REG_set(THP_DEFERRED_SPLIT_PAGE, thp_deferred_split_page)
REG_set(THP_FAULT_ALLOC, thp_fault_alloc)
REG_set(THP_FAULT_FALLBACK, thp_fault_fallback)
REG_set(THP_FILE_ALLOC, thp_file_alloc)
REG_set(THP_FILE_MAPPED, thp_file_mapped)
REG_set(THP_SPLIT_PAGE, thp_split_page)
REG_set(THP_SPLIT_PAGE_FAILED, thp_split_page_failed)
REG_set(THP_SPLIT_PMD, thp_split_pmd)
REG_set(THP_SPLIT_PUD, thp_split_pud)
REG_set(THP_SWPOUT, thp_swpout)
REG_set(THP_SWPOUT_FALLBACK, thp_swpout_fallback)
REG_set(THP_ZERO_PAGE_ALLOC, thp_zero_page_alloc)
REG_set(THP_ZERO_PAGE_ALLOC_FAILED, thp_zero_page_alloc_failed)
REG_set(UNEVICTABLE_PGS_CLEARED, unevictable_pgs_cleared)
REG_set(UNEVICTABLE_PGS_CULLED, unevictable_pgs_culled)
REG_set(UNEVICTABLE_PGS_MLOCKED, unevictable_pgs_mlocked)
REG_set(UNEVICTABLE_PGS_MUNLOCKED, unevictable_pgs_munlocked)
REG_set(UNEVICTABLE_PGS_RESCUED, unevictable_pgs_rescued)
REG_set(UNEVICTABLE_PGS_SCANNED, unevictable_pgs_scanned)
REG_set(UNEVICTABLE_PGS_STRANDED, unevictable_pgs_stranded)
REG_set(WORKINGSET_ACTIVATE, workingset_activate)
REG_set(WORKINGSET_NODERECLAIM, workingset_nodereclaim)
REG_set(WORKINGSET_NODES, workingset_nodes)
REG_set(WORKINGSET_REFAULT, workingset_refault)
REG_set(WORKINGSET_RESTORE, workingset_restore)
REG_set(ZONE_RECLAIM_FAILED, zone_reclaim_failed)
HST_set(DELTA_ALLOCSTALL_DMA, allocstall_dma)
HST_set(DELTA_ALLOCSTALL_DMA32, allocstall_dma32)
HST_set(DELTA_ALLOCSTALL_HIGH, allocstall_high)
HST_set(DELTA_ALLOCSTALL_MOVABLE, allocstall_movable)
HST_set(DELTA_ALLOCSTALL_NORMAL, allocstall_normal)
HST_set(DELTA_BALLOON_DEFLATE, balloon_deflate)
HST_set(DELTA_BALLOON_INFLATE, balloon_inflate)
HST_set(DELTA_BALLOON_MIGRATE, balloon_migrate)
HST_set(DELTA_COMPACT_DAEMON_FREE_SCANNED, compact_daemon_free_scanned)
HST_set(DELTA_COMPACT_DAEMON_MIGRATE_SCANNED, compact_daemon_migrate_scanned)
HST_set(DELTA_COMPACT_DAEMON_WAKE, compact_daemon_wake)
HST_set(DELTA_COMPACT_FAIL, compact_fail)
HST_set(DELTA_COMPACT_FREE_SCANNED, compact_free_scanned)
HST_set(DELTA_COMPACT_ISOLATED, compact_isolated)
HST_set(DELTA_COMPACT_MIGRATE_SCANNED, compact_migrate_scanned)
HST_set(DELTA_COMPACT_STALL, compact_stall)
HST_set(DELTA_COMPACT_SUCCESS, compact_success)
HST_set(DELTA_DROP_PAGECACHE, drop_pagecache)
HST_set(DELTA_DROP_SLAB, drop_slab)
HST_set(DELTA_HTLB_BUDDY_ALLOC_FAIL, htlb_buddy_alloc_fail)
HST_set(DELTA_HTLB_BUDDY_ALLOC_SUCCESS, htlb_buddy_alloc_success)
HST_set(DELTA_KSWAPD_HIGH_WMARK_HIT_QUICKLY, kswapd_high_wmark_hit_quickly)
HST_set(DELTA_KSWAPD_INODESTEAL, kswapd_inodesteal)
HST_set(DELTA_KSWAPD_LOW_WMARK_HIT_QUICKLY, kswapd_low_wmark_hit_quickly)
HST_set(DELTA_NR_ACTIVE_ANON, nr_active_anon)
HST_set(DELTA_NR_ACTIVE_FILE, nr_active_file)
HST_set(DELTA_NR_ANON_PAGES, nr_anon_pages)
HST_set(DELTA_NR_ANON_TRANSPARENT_HUGEPAGES, nr_anon_transparent_hugepages)
HST_set(DELTA_NR_BOUNCE, nr_bounce)
HST_set(DELTA_NR_DIRTIED, nr_dirtied)
HST_set(DELTA_NR_DIRTY, nr_dirty)
HST_set(DELTA_NR_DIRTY_BACKGROUND_THRESHOLD, nr_dirty_background_threshold)
HST_set(DELTA_NR_DIRTY_THRESHOLD, nr_dirty_threshold)
HST_set(DELTA_NR_FILE_PAGES, nr_file_pages)
HST_set(DELTA_NR_FREE_CMA, nr_free_cma)
HST_set(DELTA_NR_FREE_PAGES, nr_free_pages)
HST_set(DELTA_NR_INACTIVE_ANON, nr_inactive_anon)
HST_set(DELTA_NR_INACTIVE_FILE, nr_inactive_file)
HST_set(DELTA_NR_ISOLATED_ANON, nr_isolated_anon)
HST_set(DELTA_NR_ISOLATED_FILE, nr_isolated_file)
HST_set(DELTA_NR_KERNEL_MISC_RECLAIMABLE, nr_kernel_misc_reclaimable)
HST_set(DELTA_NR_KERNEL_STACK, nr_kernel_stack)
HST_set(DELTA_NR_MAPPED, nr_mapped)
HST_set(DELTA_NR_MLOCK, nr_mlock)
HST_set(DELTA_NR_PAGE_TABLE_PAGES, nr_page_table_pages)
HST_set(DELTA_NR_SHMEM, nr_shmem)
HST_set(DELTA_NR_SHMEM_HUGEPAGES, nr_shmem_hugepages)
HST_set(DELTA_NR_SHMEM_PMDMAPPED, nr_shmem_pmdmapped)
HST_set(DELTA_NR_SLAB_RECLAIMABLE, nr_slab_reclaimable)
HST_set(DELTA_NR_SLAB_UNRECLAIMABLE, nr_slab_unreclaimable)
HST_set(DELTA_NR_UNEVICTABLE, nr_unevictable)
HST_set(DELTA_NR_UNSTABLE, nr_unstable)
HST_set(DELTA_NR_VMSCAN_IMMEDIATE_RECLAIM, nr_vmscan_immediate_reclaim)
HST_set(DELTA_NR_VMSCAN_WRITE, nr_vmscan_write)
HST_set(DELTA_NR_WRITEBACK, nr_writeback)
HST_set(DELTA_NR_WRITEBACK_TEMP, nr_writeback_temp)
HST_set(DELTA_NR_WRITTEN, nr_written)
HST_set(DELTA_NR_ZONE_ACTIVE_ANON, nr_zone_active_anon)
HST_set(DELTA_NR_ZONE_ACTIVE_FILE, nr_zone_active_file)
HST_set(DELTA_NR_ZONE_INACTIVE_ANON, nr_zone_inactive_anon)
HST_set(DELTA_NR_ZONE_INACTIVE_FILE, nr_zone_inactive_file)
HST_set(DELTA_NR_ZONE_UNEVICTABLE, nr_zone_unevictable)
HST_set(DELTA_NR_ZONE_WRITE_PENDING, nr_zone_write_pending)
HST_set(DELTA_NR_ZSPAGES, nr_zspages)
HST_set(DELTA_NUMA_FOREIGN, numa_foreign)
HST_set(DELTA_NUMA_HINT_FAULTS, numa_hint_faults)
HST_set(DELTA_NUMA_HINT_FAULTS_LOCAL, numa_hint_faults_local)
HST_set(DELTA_NUMA_HIT, numa_hit)
HST_set(DELTA_NUMA_HUGE_PTE_UPDATES, numa_huge_pte_updates)
HST_set(DELTA_NUMA_INTERLEAVE, numa_interleave)
HST_set(DELTA_NUMA_LOCAL, numa_local)
HST_set(DELTA_NUMA_MISS, numa_miss)
HST_set(DELTA_NUMA_OTHER, numa_other)
HST_set(DELTA_NUMA_PAGES_MIGRATED, numa_pages_migrated)
HST_set(DELTA_NUMA_PTE_UPDATES, numa_pte_updates)
HST_set(DELTA_OOM_KILL, oom_kill)
HST_set(DELTA_PAGEOUTRUN, pageoutrun)
HST_set(DELTA_PGACTIVATE, pgactivate)
HST_set(DELTA_PGALLOC_DMA, pgalloc_dma)
HST_set(DELTA_PGALLOC_DMA32, pgalloc_dma32)
HST_set(DELTA_PGALLOC_HIGH, pgalloc_high)
HST_set(DELTA_PGALLOC_MOVABLE, pgalloc_movable)
HST_set(DELTA_PGALLOC_NORMAL, pgalloc_normal)
HST_set(DELTA_PGDEACTIVATE, pgdeactivate)
HST_set(DELTA_PGFAULT, pgfault)
HST_set(DELTA_PGFREE, pgfree)
HST_set(DELTA_PGINODESTEAL, pginodesteal)
HST_set(DELTA_PGLAZYFREE, pglazyfree)
HST_set(DELTA_PGLAZYFREED, pglazyfreed)
HST_set(DELTA_PGMAJFAULT, pgmajfault)
HST_set(DELTA_PGMIGRATE_FAIL, pgmigrate_fail)
HST_set(DELTA_PGMIGRATE_SUCCESS, pgmigrate_success)
HST_set(DELTA_PGPGIN, pgpgin)
HST_set(DELTA_PGPGOUT, pgpgout)
HST_set(DELTA_PGREFILL, pgrefill)
HST_set(DELTA_PGROTATED, pgrotated)
HST_set(DELTA_PGSCAN_DIRECT, pgscan_direct)
HST_set(DELTA_PGSCAN_DIRECT_THROTTLE, pgscan_direct_throttle)
HST_set(DELTA_PGSCAN_KSWAPD, pgscan_kswapd)
HST_set(DELTA_PGSKIP_DMA, pgskip_dma)
HST_set(DELTA_PGSKIP_DMA32, pgskip_dma32)
HST_set(DELTA_PGSKIP_HIGH, pgskip_high)
HST_set(DELTA_PGSKIP_MOVABLE, pgskip_movable)
HST_set(DELTA_PGSKIP_NORMAL, pgskip_normal)
HST_set(DELTA_PGSTEAL_DIRECT, pgsteal_direct)
HST_set(DELTA_PGSTEAL_KSWAPD, pgsteal_kswapd)
HST_set(DELTA_PSWPIN, pswpin)
HST_set(DELTA_PSWPOUT, pswpout)
HST_set(DELTA_SLABS_SCANNED, slabs_scanned)
HST_set(DELTA_SWAP_RA, swap_ra)
HST_set(DELTA_SWAP_RA_HIT, swap_ra_hit)
HST_set(DELTA_THP_COLLAPSE_ALLOC, thp_collapse_alloc)
HST_set(DELTA_THP_COLLAPSE_ALLOC_FAILED, thp_collapse_alloc_failed)
HST_set(DELTA_THP_DEFERRED_SPLIT_PAGE, thp_deferred_split_page)
HST_set(DELTA_THP_FAULT_ALLOC, thp_fault_alloc)
HST_set(DELTA_THP_FAULT_FALLBACK, thp_fault_fallback)
HST_set(DELTA_THP_FILE_ALLOC, thp_file_alloc)
HST_set(DELTA_THP_FILE_MAPPED, thp_file_mapped)
HST_set(DELTA_THP_SPLIT_PAGE, thp_split_page)
HST_set(DELTA_THP_SPLIT_PAGE_FAILED, thp_split_page_failed)
HST_set(DELTA_THP_SPLIT_PMD, thp_split_pmd)
HST_set(DELTA_THP_SPLIT_PUD, thp_split_pud)
HST_set(DELTA_THP_SWPOUT, thp_swpout)
HST_set(DELTA_THP_SWPOUT_FALLBACK, thp_swpout_fallback)
HST_set(DELTA_THP_ZERO_PAGE_ALLOC, thp_zero_page_alloc)
HST_set(DELTA_THP_ZERO_PAGE_ALLOC_FAILED, thp_zero_page_alloc_failed)
HST_set(DELTA_UNEVICTABLE_PGS_CLEARED, unevictable_pgs_cleared)
HST_set(DELTA_UNEVICTABLE_PGS_CULLED, unevictable_pgs_culled)
HST_set(DELTA_UNEVICTABLE_PGS_MLOCKED, unevictable_pgs_mlocked)
HST_set(DELTA_UNEVICTABLE_PGS_MUNLOCKED, unevictable_pgs_munlocked)
HST_set(DELTA_UNEVICTABLE_PGS_RESCUED, unevictable_pgs_rescued)
HST_set(DELTA_UNEVICTABLE_PGS_SCANNED, unevictable_pgs_scanned)
HST_set(DELTA_UNEVICTABLE_PGS_STRANDED, unevictable_pgs_stranded)
HST_set(DELTA_WORKINGSET_ACTIVATE, workingset_activate)
HST_set(DELTA_WORKINGSET_NODERECLAIM, workingset_nodereclaim)
HST_set(DELTA_WORKINGSET_NODES, workingset_nodes)
HST_set(DELTA_WORKINGSET_REFAULT, workingset_refault)
HST_set(DELTA_WORKINGSET_RESTORE, workingset_restore)
HST_set(DELTA_ZONE_RECLAIM_FAILED, zone_reclaim_failed)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
#undef setDECL
#undef REG_set
#undef HST_set
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
// ___ Controlling Table ||||||||||||||||||||||||||||||||||||||||||||||||||||||
typedef void (*SET_t)(struct vmstat_result *, struct vmstat_hist *);
#define RS(e) (SET_t)setNAME(e)
#define TS(t) STRINGIFY(t)
#define TS_noop ""
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
/*
* Need it be said?
* This table must be kept in the exact same order as
* those 'enum vmstat_item' guys ! */
static struct {
SET_t setsfunc; // the actual result setting routine
char *type2str; // the result type as a string value
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
} Item_table[] = {
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
/* setsfunc type2str
----------------------------------------- ---------- */
{ RS(noop), TS_noop },
{ RS(extra), TS_noop },
{ RS(ALLOCSTALL_DMA), TS(ul_int) },
{ RS(ALLOCSTALL_DMA32), TS(ul_int) },
{ RS(ALLOCSTALL_HIGH), TS(ul_int) },
{ RS(ALLOCSTALL_MOVABLE), TS(ul_int) },
{ RS(ALLOCSTALL_NORMAL), TS(ul_int) },
{ RS(BALLOON_DEFLATE), TS(ul_int) },
{ RS(BALLOON_INFLATE), TS(ul_int) },
{ RS(BALLOON_MIGRATE), TS(ul_int) },
{ RS(COMPACT_DAEMON_FREE_SCANNED), TS(ul_int) },
{ RS(COMPACT_DAEMON_MIGRATE_SCANNED), TS(ul_int) },
{ RS(COMPACT_DAEMON_WAKE), TS(ul_int) },
{ RS(COMPACT_FAIL), TS(ul_int) },
{ RS(COMPACT_FREE_SCANNED), TS(ul_int) },
{ RS(COMPACT_ISOLATED), TS(ul_int) },
{ RS(COMPACT_MIGRATE_SCANNED), TS(ul_int) },
{ RS(COMPACT_STALL), TS(ul_int) },
{ RS(COMPACT_SUCCESS), TS(ul_int) },
{ RS(DROP_PAGECACHE), TS(ul_int) },
{ RS(DROP_SLAB), TS(ul_int) },
{ RS(HTLB_BUDDY_ALLOC_FAIL), TS(ul_int) },
{ RS(HTLB_BUDDY_ALLOC_SUCCESS), TS(ul_int) },
{ RS(KSWAPD_HIGH_WMARK_HIT_QUICKLY), TS(ul_int) },
{ RS(KSWAPD_INODESTEAL), TS(ul_int) },
{ RS(KSWAPD_LOW_WMARK_HIT_QUICKLY), TS(ul_int) },
{ RS(NR_ACTIVE_ANON), TS(ul_int) },
{ RS(NR_ACTIVE_FILE), TS(ul_int) },
{ RS(NR_ANON_PAGES), TS(ul_int) },
{ RS(NR_ANON_TRANSPARENT_HUGEPAGES), TS(ul_int) },
{ RS(NR_BOUNCE), TS(ul_int) },
{ RS(NR_DIRTIED), TS(ul_int) },
{ RS(NR_DIRTY), TS(ul_int) },
{ RS(NR_DIRTY_BACKGROUND_THRESHOLD), TS(ul_int) },
{ RS(NR_DIRTY_THRESHOLD), TS(ul_int) },
{ RS(NR_FILE_PAGES), TS(ul_int) },
{ RS(NR_FREE_CMA), TS(ul_int) },
{ RS(NR_FREE_PAGES), TS(ul_int) },
{ RS(NR_INACTIVE_ANON), TS(ul_int) },
{ RS(NR_INACTIVE_FILE), TS(ul_int) },
{ RS(NR_ISOLATED_ANON), TS(ul_int) },
{ RS(NR_ISOLATED_FILE), TS(ul_int) },
{ RS(NR_KERNEL_MISC_RECLAIMABLE), TS(ul_int) },
{ RS(NR_KERNEL_STACK), TS(ul_int) },
{ RS(NR_MAPPED), TS(ul_int) },
{ RS(NR_MLOCK), TS(ul_int) },
{ RS(NR_PAGE_TABLE_PAGES), TS(ul_int) },
{ RS(NR_SHMEM), TS(ul_int) },
{ RS(NR_SHMEM_HUGEPAGES), TS(ul_int) },
{ RS(NR_SHMEM_PMDMAPPED), TS(ul_int) },
{ RS(NR_SLAB_RECLAIMABLE), TS(ul_int) },
{ RS(NR_SLAB_UNRECLAIMABLE), TS(ul_int) },
{ RS(NR_UNEVICTABLE), TS(ul_int) },
{ RS(NR_UNSTABLE), TS(ul_int) },
{ RS(NR_VMSCAN_IMMEDIATE_RECLAIM), TS(ul_int) },
{ RS(NR_VMSCAN_WRITE), TS(ul_int) },
{ RS(NR_WRITEBACK), TS(ul_int) },
{ RS(NR_WRITEBACK_TEMP), TS(ul_int) },
{ RS(NR_WRITTEN), TS(ul_int) },
{ RS(NR_ZONE_ACTIVE_ANON), TS(ul_int) },
{ RS(NR_ZONE_ACTIVE_FILE), TS(ul_int) },
{ RS(NR_ZONE_INACTIVE_ANON), TS(ul_int) },
{ RS(NR_ZONE_INACTIVE_FILE), TS(ul_int) },
{ RS(NR_ZONE_UNEVICTABLE), TS(ul_int) },
{ RS(NR_ZONE_WRITE_PENDING), TS(ul_int) },
{ RS(NR_ZSPAGES), TS(ul_int) },
{ RS(NUMA_FOREIGN), TS(ul_int) },
{ RS(NUMA_HINT_FAULTS), TS(ul_int) },
{ RS(NUMA_HINT_FAULTS_LOCAL), TS(ul_int) },
{ RS(NUMA_HIT), TS(ul_int) },
{ RS(NUMA_HUGE_PTE_UPDATES), TS(ul_int) },
{ RS(NUMA_INTERLEAVE), TS(ul_int) },
{ RS(NUMA_LOCAL), TS(ul_int) },
{ RS(NUMA_MISS), TS(ul_int) },
{ RS(NUMA_OTHER), TS(ul_int) },
{ RS(NUMA_PAGES_MIGRATED), TS(ul_int) },
{ RS(NUMA_PTE_UPDATES), TS(ul_int) },
{ RS(OOM_KILL), TS(ul_int) },
{ RS(PAGEOUTRUN), TS(ul_int) },
{ RS(PGACTIVATE), TS(ul_int) },
{ RS(PGALLOC_DMA), TS(ul_int) },
{ RS(PGALLOC_DMA32), TS(ul_int) },
{ RS(PGALLOC_HIGH), TS(ul_int) },
{ RS(PGALLOC_MOVABLE), TS(ul_int) },
{ RS(PGALLOC_NORMAL), TS(ul_int) },
{ RS(PGDEACTIVATE), TS(ul_int) },
{ RS(PGFAULT), TS(ul_int) },
{ RS(PGFREE), TS(ul_int) },
{ RS(PGINODESTEAL), TS(ul_int) },
{ RS(PGLAZYFREE), TS(ul_int) },
{ RS(PGLAZYFREED), TS(ul_int) },
{ RS(PGMAJFAULT), TS(ul_int) },
{ RS(PGMIGRATE_FAIL), TS(ul_int) },
{ RS(PGMIGRATE_SUCCESS), TS(ul_int) },
{ RS(PGPGIN), TS(ul_int) },
{ RS(PGPGOUT), TS(ul_int) },
{ RS(PGREFILL), TS(ul_int) },
{ RS(PGROTATED), TS(ul_int) },
{ RS(PGSCAN_DIRECT), TS(ul_int) },
{ RS(PGSCAN_DIRECT_THROTTLE), TS(ul_int) },
{ RS(PGSCAN_KSWAPD), TS(ul_int) },
{ RS(PGSKIP_DMA), TS(ul_int) },
{ RS(PGSKIP_DMA32), TS(ul_int) },
{ RS(PGSKIP_HIGH), TS(ul_int) },
{ RS(PGSKIP_MOVABLE), TS(ul_int) },
{ RS(PGSKIP_NORMAL), TS(ul_int) },
{ RS(PGSTEAL_DIRECT), TS(ul_int) },
{ RS(PGSTEAL_KSWAPD), TS(ul_int) },
{ RS(PSWPIN), TS(ul_int) },
{ RS(PSWPOUT), TS(ul_int) },
{ RS(SLABS_SCANNED), TS(ul_int) },
{ RS(SWAP_RA), TS(ul_int) },
{ RS(SWAP_RA_HIT), TS(ul_int) },
{ RS(THP_COLLAPSE_ALLOC), TS(ul_int) },
{ RS(THP_COLLAPSE_ALLOC_FAILED), TS(ul_int) },
{ RS(THP_DEFERRED_SPLIT_PAGE), TS(ul_int) },
{ RS(THP_FAULT_ALLOC), TS(ul_int) },
{ RS(THP_FAULT_FALLBACK), TS(ul_int) },
{ RS(THP_FILE_ALLOC), TS(ul_int) },
{ RS(THP_FILE_MAPPED), TS(ul_int) },
{ RS(THP_SPLIT_PAGE), TS(ul_int) },
{ RS(THP_SPLIT_PAGE_FAILED), TS(ul_int) },
{ RS(THP_SPLIT_PMD), TS(ul_int) },
{ RS(THP_SPLIT_PUD), TS(ul_int) },
{ RS(THP_SWPOUT), TS(ul_int) },
{ RS(THP_SWPOUT_FALLBACK), TS(ul_int) },
{ RS(THP_ZERO_PAGE_ALLOC), TS(ul_int) },
{ RS(THP_ZERO_PAGE_ALLOC_FAILED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_CLEARED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_CULLED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_MLOCKED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_MUNLOCKED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_RESCUED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_SCANNED), TS(ul_int) },
{ RS(UNEVICTABLE_PGS_STRANDED), TS(ul_int) },
{ RS(WORKINGSET_ACTIVATE), TS(ul_int) },
{ RS(WORKINGSET_NODERECLAIM), TS(ul_int) },
{ RS(WORKINGSET_NODES), TS(ul_int) },
{ RS(WORKINGSET_REFAULT), TS(ul_int) },
{ RS(WORKINGSET_RESTORE), TS(ul_int) },
{ RS(ZONE_RECLAIM_FAILED), TS(ul_int) },
{ RS(DELTA_ALLOCSTALL_DMA), TS(sl_int) },
{ RS(DELTA_ALLOCSTALL_DMA32), TS(sl_int) },
{ RS(DELTA_ALLOCSTALL_HIGH), TS(sl_int) },
{ RS(DELTA_ALLOCSTALL_MOVABLE), TS(sl_int) },
{ RS(DELTA_ALLOCSTALL_NORMAL), TS(sl_int) },
{ RS(DELTA_BALLOON_DEFLATE), TS(sl_int) },
{ RS(DELTA_BALLOON_INFLATE), TS(sl_int) },
{ RS(DELTA_BALLOON_MIGRATE), TS(sl_int) },
{ RS(DELTA_COMPACT_DAEMON_FREE_SCANNED), TS(sl_int) },
{ RS(DELTA_COMPACT_DAEMON_MIGRATE_SCANNED), TS(sl_int) },
{ RS(DELTA_COMPACT_DAEMON_WAKE), TS(sl_int) },
{ RS(DELTA_COMPACT_FAIL), TS(sl_int) },
{ RS(DELTA_COMPACT_FREE_SCANNED), TS(sl_int) },
{ RS(DELTA_COMPACT_ISOLATED), TS(sl_int) },
{ RS(DELTA_COMPACT_MIGRATE_SCANNED), TS(sl_int) },
{ RS(DELTA_COMPACT_STALL), TS(sl_int) },
{ RS(DELTA_COMPACT_SUCCESS), TS(sl_int) },
{ RS(DELTA_DROP_PAGECACHE), TS(sl_int) },
{ RS(DELTA_DROP_SLAB), TS(sl_int) },
{ RS(DELTA_HTLB_BUDDY_ALLOC_FAIL), TS(sl_int) },
{ RS(DELTA_HTLB_BUDDY_ALLOC_SUCCESS), TS(sl_int) },
{ RS(DELTA_KSWAPD_HIGH_WMARK_HIT_QUICKLY), TS(sl_int) },
{ RS(DELTA_KSWAPD_INODESTEAL), TS(sl_int) },
{ RS(DELTA_KSWAPD_LOW_WMARK_HIT_QUICKLY), TS(sl_int) },
{ RS(DELTA_NR_ACTIVE_ANON), TS(sl_int) },
{ RS(DELTA_NR_ACTIVE_FILE), TS(sl_int) },
{ RS(DELTA_NR_ANON_PAGES), TS(sl_int) },
{ RS(DELTA_NR_ANON_TRANSPARENT_HUGEPAGES), TS(sl_int) },
{ RS(DELTA_NR_BOUNCE), TS(sl_int) },
{ RS(DELTA_NR_DIRTIED), TS(sl_int) },
{ RS(DELTA_NR_DIRTY), TS(sl_int) },
{ RS(DELTA_NR_DIRTY_BACKGROUND_THRESHOLD), TS(sl_int) },
{ RS(DELTA_NR_DIRTY_THRESHOLD), TS(sl_int) },
{ RS(DELTA_NR_FILE_PAGES), TS(sl_int) },
{ RS(DELTA_NR_FREE_CMA), TS(sl_int) },
{ RS(DELTA_NR_FREE_PAGES), TS(sl_int) },
{ RS(DELTA_NR_INACTIVE_ANON), TS(sl_int) },
{ RS(DELTA_NR_INACTIVE_FILE), TS(sl_int) },
{ RS(DELTA_NR_ISOLATED_ANON), TS(sl_int) },
{ RS(DELTA_NR_ISOLATED_FILE), TS(sl_int) },
{ RS(DELTA_NR_KERNEL_MISC_RECLAIMABLE), TS(sl_int) },
{ RS(DELTA_NR_KERNEL_STACK), TS(sl_int) },
{ RS(DELTA_NR_MAPPED), TS(sl_int) },
{ RS(DELTA_NR_MLOCK), TS(sl_int) },
{ RS(DELTA_NR_PAGE_TABLE_PAGES), TS(sl_int) },
{ RS(DELTA_NR_SHMEM), TS(sl_int) },
{ RS(DELTA_NR_SHMEM_HUGEPAGES), TS(sl_int) },
{ RS(DELTA_NR_SHMEM_PMDMAPPED), TS(sl_int) },
{ RS(DELTA_NR_SLAB_RECLAIMABLE), TS(sl_int) },
{ RS(DELTA_NR_SLAB_UNRECLAIMABLE), TS(sl_int) },
{ RS(DELTA_NR_UNEVICTABLE), TS(sl_int) },
{ RS(DELTA_NR_UNSTABLE), TS(sl_int) },
{ RS(DELTA_NR_VMSCAN_IMMEDIATE_RECLAIM), TS(sl_int) },
{ RS(DELTA_NR_VMSCAN_WRITE), TS(sl_int) },
{ RS(DELTA_NR_WRITEBACK), TS(sl_int) },
{ RS(DELTA_NR_WRITEBACK_TEMP), TS(sl_int) },
{ RS(DELTA_NR_WRITTEN), TS(sl_int) },
{ RS(DELTA_NR_ZONE_ACTIVE_ANON), TS(sl_int) },
{ RS(DELTA_NR_ZONE_ACTIVE_FILE), TS(sl_int) },
{ RS(DELTA_NR_ZONE_INACTIVE_ANON), TS(sl_int) },
{ RS(DELTA_NR_ZONE_INACTIVE_FILE), TS(sl_int) },
{ RS(DELTA_NR_ZONE_UNEVICTABLE), TS(sl_int) },
{ RS(DELTA_NR_ZONE_WRITE_PENDING), TS(sl_int) },
{ RS(DELTA_NR_ZSPAGES), TS(sl_int) },
{ RS(DELTA_NUMA_FOREIGN), TS(sl_int) },
{ RS(DELTA_NUMA_HINT_FAULTS), TS(sl_int) },
{ RS(DELTA_NUMA_HINT_FAULTS_LOCAL), TS(sl_int) },
{ RS(DELTA_NUMA_HIT), TS(sl_int) },
{ RS(DELTA_NUMA_HUGE_PTE_UPDATES), TS(sl_int) },
{ RS(DELTA_NUMA_INTERLEAVE), TS(sl_int) },
{ RS(DELTA_NUMA_LOCAL), TS(sl_int) },
{ RS(DELTA_NUMA_MISS), TS(sl_int) },
{ RS(DELTA_NUMA_OTHER), TS(sl_int) },
{ RS(DELTA_NUMA_PAGES_MIGRATED), TS(sl_int) },
{ RS(DELTA_NUMA_PTE_UPDATES), TS(sl_int) },
{ RS(DELTA_OOM_KILL), TS(sl_int) },
{ RS(DELTA_PAGEOUTRUN), TS(sl_int) },
{ RS(DELTA_PGACTIVATE), TS(sl_int) },
{ RS(DELTA_PGALLOC_DMA), TS(sl_int) },
{ RS(DELTA_PGALLOC_DMA32), TS(sl_int) },
{ RS(DELTA_PGALLOC_HIGH), TS(sl_int) },
{ RS(DELTA_PGALLOC_MOVABLE), TS(sl_int) },
{ RS(DELTA_PGALLOC_NORMAL), TS(sl_int) },
{ RS(DELTA_PGDEACTIVATE), TS(sl_int) },
{ RS(DELTA_PGFAULT), TS(sl_int) },
{ RS(DELTA_PGFREE), TS(sl_int) },
{ RS(DELTA_PGINODESTEAL), TS(sl_int) },
{ RS(DELTA_PGLAZYFREE), TS(sl_int) },
{ RS(DELTA_PGLAZYFREED), TS(sl_int) },
{ RS(DELTA_PGMAJFAULT), TS(sl_int) },
{ RS(DELTA_PGMIGRATE_FAIL), TS(sl_int) },
{ RS(DELTA_PGMIGRATE_SUCCESS), TS(sl_int) },
{ RS(DELTA_PGPGIN), TS(sl_int) },
{ RS(DELTA_PGPGOUT), TS(sl_int) },
{ RS(DELTA_PGREFILL), TS(sl_int) },
{ RS(DELTA_PGROTATED), TS(sl_int) },
{ RS(DELTA_PGSCAN_DIRECT), TS(sl_int) },
{ RS(DELTA_PGSCAN_DIRECT_THROTTLE), TS(sl_int) },
{ RS(DELTA_PGSCAN_KSWAPD), TS(sl_int) },
{ RS(DELTA_PGSKIP_DMA), TS(sl_int) },
{ RS(DELTA_PGSKIP_DMA32), TS(sl_int) },
{ RS(DELTA_PGSKIP_HIGH), TS(sl_int) },
{ RS(DELTA_PGSKIP_MOVABLE), TS(sl_int) },
{ RS(DELTA_PGSKIP_NORMAL), TS(sl_int) },
{ RS(DELTA_PGSTEAL_DIRECT), TS(sl_int) },
{ RS(DELTA_PGSTEAL_KSWAPD), TS(sl_int) },
{ RS(DELTA_PSWPIN), TS(sl_int) },
{ RS(DELTA_PSWPOUT), TS(sl_int) },
{ RS(DELTA_SLABS_SCANNED), TS(sl_int) },
{ RS(DELTA_SWAP_RA), TS(sl_int) },
{ RS(DELTA_SWAP_RA_HIT), TS(sl_int) },
{ RS(DELTA_THP_COLLAPSE_ALLOC), TS(sl_int) },
{ RS(DELTA_THP_COLLAPSE_ALLOC_FAILED), TS(sl_int) },
{ RS(DELTA_THP_DEFERRED_SPLIT_PAGE), TS(sl_int) },
{ RS(DELTA_THP_FAULT_ALLOC), TS(sl_int) },
{ RS(DELTA_THP_FAULT_FALLBACK), TS(sl_int) },
{ RS(DELTA_THP_FILE_ALLOC), TS(sl_int) },
{ RS(DELTA_THP_FILE_MAPPED), TS(sl_int) },
{ RS(DELTA_THP_SPLIT_PAGE), TS(sl_int) },
{ RS(DELTA_THP_SPLIT_PAGE_FAILED), TS(sl_int) },
{ RS(DELTA_THP_SPLIT_PMD), TS(sl_int) },
{ RS(DELTA_THP_SPLIT_PUD), TS(sl_int) },
{ RS(DELTA_THP_SWPOUT), TS(sl_int) },
{ RS(DELTA_THP_SWPOUT_FALLBACK), TS(sl_int) },
{ RS(DELTA_THP_ZERO_PAGE_ALLOC), TS(sl_int) },
{ RS(DELTA_THP_ZERO_PAGE_ALLOC_FAILED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_CLEARED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_CULLED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_MLOCKED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_MUNLOCKED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_RESCUED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_SCANNED), TS(sl_int) },
{ RS(DELTA_UNEVICTABLE_PGS_STRANDED), TS(sl_int) },
{ RS(DELTA_WORKINGSET_ACTIVATE), TS(sl_int) },
{ RS(DELTA_WORKINGSET_NODERECLAIM), TS(sl_int) },
{ RS(DELTA_WORKINGSET_NODES), TS(sl_int) },
{ RS(DELTA_WORKINGSET_REFAULT), TS(sl_int) },
{ RS(DELTA_WORKINGSET_RESTORE), TS(sl_int) },
{ RS(DELTA_ZONE_RECLAIM_FAILED), TS(sl_int) },
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
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 VMSTAT_logical_end ...
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
{ NULL, NULL }
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
};
/* please note,
* this enum MUST be 1 greater than the highest value of any enum */
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 vmstat_item VMSTAT_logical_end = VMSTAT_DELTA_ZONE_RECLAIM_FAILED + 1;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
#undef setNAME
#undef RS
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
// ___ Private Functions ||||||||||||||||||||||||||||||||||||||||||||||||||||||
static inline void vmstat_assign_results (
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
struct vmstat_stack *stack,
struct vmstat_hist *hist)
{
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
struct vmstat_result *this = stack->head;
for (;;) {
enum vmstat_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 >= VMSTAT_logical_end)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
break;
Item_table[item].setsfunc(this, hist);
++this;
}
return;
} // end: vmstat_assign_results
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
static void vmstat_extents_free_all (
struct vmstat_info *info)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
{
while (info->extents) {
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
struct stacks_extent *p = info->extents;
info->extents = info->extents->next;
free(p);
};
} // end: vmstat_extents_free_all
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
static inline struct vmstat_result *vmstat_itemize_stack (
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
struct vmstat_result *p,
int depth,
enum vmstat_item *items)
{
struct vmstat_result *p_sav = p;
int i;
for (i = 0; i < depth; i++) {
p->item = items[i];
++p;
}
return p_sav;
} // end: vmstat_itemize_stack
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
static inline int vmstat_items_check_failed (
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
int numitems,
enum vmstat_item *items)
{
int i;
/* 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 vmstat_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_vmstat_select(info, VMSTAT_noop, num);
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 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 * VMSTAT_logical_end))
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
return 1;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
for (i = 0; i < numitems; i++) {
// a vmstat_item is currently unsigned, but we'll protect our future
if (items[i] < 0)
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
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] >= VMSTAT_logical_end)
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
return 1;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
}
return 0;
} // end: vmstat_items_check_failed
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
static int vmstat_make_hash_failed (
struct vmstat_info *info)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
{
#define htVAL(f) e.key = STRINGIFY(f); e.data = &info->hist.new. f; \
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
if (!hsearch_r(e, ENTER, &ep, &info->hashtab)) return 1;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
ENTRY e, *ep;
size_t n;
n = sizeof(struct vmstat_data) / sizeof(unsigned long);
// we'll follow the hsearch recommendation of an extra 25%
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
if (!hcreate_r(n + (n / 4), &info->hashtab))
return 1;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(allocstall_dma)
htVAL(allocstall_dma32)
htVAL(allocstall_high)
htVAL(allocstall_movable)
htVAL(allocstall_normal)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(balloon_deflate)
htVAL(balloon_inflate)
htVAL(balloon_migrate)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(compact_daemon_free_scanned)
htVAL(compact_daemon_migrate_scanned)
htVAL(compact_daemon_wake)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(compact_fail)
htVAL(compact_free_scanned)
htVAL(compact_isolated)
htVAL(compact_migrate_scanned)
htVAL(compact_stall)
htVAL(compact_success)
htVAL(drop_pagecache)
htVAL(drop_slab)
htVAL(htlb_buddy_alloc_fail)
htVAL(htlb_buddy_alloc_success)
htVAL(kswapd_high_wmark_hit_quickly)
htVAL(kswapd_inodesteal)
htVAL(kswapd_low_wmark_hit_quickly)
htVAL(nr_active_anon)
htVAL(nr_active_file)
htVAL(nr_anon_pages)
htVAL(nr_anon_transparent_hugepages)
htVAL(nr_bounce)
htVAL(nr_dirtied)
htVAL(nr_dirty)
htVAL(nr_dirty_background_threshold)
htVAL(nr_dirty_threshold)
htVAL(nr_file_pages)
htVAL(nr_free_cma)
htVAL(nr_free_pages)
htVAL(nr_inactive_anon)
htVAL(nr_inactive_file)
htVAL(nr_isolated_anon)
htVAL(nr_isolated_file)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(nr_kernel_misc_reclaimable)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(nr_kernel_stack)
htVAL(nr_mapped)
htVAL(nr_mlock)
htVAL(nr_page_table_pages)
htVAL(nr_shmem)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(nr_shmem_hugepages)
htVAL(nr_shmem_pmdmapped)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(nr_slab_reclaimable)
htVAL(nr_slab_unreclaimable)
htVAL(nr_unevictable)
htVAL(nr_unstable)
htVAL(nr_vmscan_immediate_reclaim)
htVAL(nr_vmscan_write)
htVAL(nr_writeback)
htVAL(nr_writeback_temp)
htVAL(nr_written)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(nr_zone_active_anon)
htVAL(nr_zone_active_file)
htVAL(nr_zone_inactive_anon)
htVAL(nr_zone_inactive_file)
htVAL(nr_zone_unevictable)
htVAL(nr_zone_write_pending)
htVAL(nr_zspages)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(numa_foreign)
htVAL(numa_hint_faults)
htVAL(numa_hint_faults_local)
htVAL(numa_hit)
htVAL(numa_huge_pte_updates)
htVAL(numa_interleave)
htVAL(numa_local)
htVAL(numa_miss)
htVAL(numa_other)
htVAL(numa_pages_migrated)
htVAL(numa_pte_updates)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(oom_kill)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(pageoutrun)
htVAL(pgactivate)
htVAL(pgalloc_dma)
htVAL(pgalloc_dma32)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(pgalloc_high)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(pgalloc_movable)
htVAL(pgalloc_normal)
htVAL(pgdeactivate)
htVAL(pgfault)
htVAL(pgfree)
htVAL(pginodesteal)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(pglazyfree)
htVAL(pglazyfreed)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(pgmajfault)
htVAL(pgmigrate_fail)
htVAL(pgmigrate_success)
htVAL(pgpgin)
htVAL(pgpgout)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(pgrefill)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(pgrotated)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(pgscan_direct)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(pgscan_direct_throttle)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(pgscan_kswapd)
htVAL(pgskip_dma)
htVAL(pgskip_dma32)
htVAL(pgskip_high)
htVAL(pgskip_movable)
htVAL(pgskip_normal)
htVAL(pgsteal_direct)
htVAL(pgsteal_kswapd)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(pswpin)
htVAL(pswpout)
htVAL(slabs_scanned)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(swap_ra)
htVAL(swap_ra_hit)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(thp_collapse_alloc)
htVAL(thp_collapse_alloc_failed)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(thp_deferred_split_page)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(thp_fault_alloc)
htVAL(thp_fault_fallback)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(thp_file_alloc)
htVAL(thp_file_mapped)
htVAL(thp_split_page)
htVAL(thp_split_page_failed)
htVAL(thp_split_pmd)
htVAL(thp_split_pud)
htVAL(thp_swpout)
htVAL(thp_swpout_fallback)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(thp_zero_page_alloc)
htVAL(thp_zero_page_alloc_failed)
htVAL(unevictable_pgs_cleared)
htVAL(unevictable_pgs_culled)
htVAL(unevictable_pgs_mlocked)
htVAL(unevictable_pgs_munlocked)
htVAL(unevictable_pgs_rescued)
htVAL(unevictable_pgs_scanned)
htVAL(unevictable_pgs_stranded)
htVAL(workingset_activate)
htVAL(workingset_nodereclaim)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(workingset_nodes)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(workingset_refault)
library: refactored some header file items and origins This commit is intended as a refinement of the patches mentioned below, where origins/sources of newlib items were added to the header files for user documentation. However, if those additions are to be truly effective, along with kernel documentation (where available), the following prerequisites must also have been satisfied: . our identifiers closely align with linux field names . our derived items are documented or self-documenting Satisfying those prerequisites prompted this patch and for these changes, kernel sources were emphasized over available documentation (shame on me, it should always have been so). And, while some 'new' fields were found to be conditional, they were included unconditionally. These changes appear more extensive than they actually need be since I have attempted to enforce some spacing conventions. So, I've summarize the significant things in the sections that follow. For a proper perspective, use: 'git diff --ignore-space-change' (good as alias). ___________________________________________ <PIDS> api This api is unique in that there exists many different file/directory origins subordinate to /proc/<pid>. And our item identifiers are sometimes coerced so as to be able to group related or similar enumerators together. So, users needed more help relating our identifiers to an actual documented field. Thus, we will now also add the field names as with 'stat: delayacct_blkio_ticks'. Each item ending with a '_C' now consistently includes both the parent's count/time plus waited for children. That 'RTPRIO' guy was renamed/relocated as PRIORITY_RT since its original name is an implementation artifact. ___________________________________________ <STAT> api The only api change was to correct a typo ('dervied'). _________________________________________ <VMSTAT> api Even ignoring white space, this interface received the largest number of changes. Mostly, this was because of deficiencies in the proc(5) documentation. Recall that this documentation already sorely lacks any substance. Usually, just kernel releases are noted, not contents. When compared to kernel source, that proc(5) contained many non-existent fields and also omitted many others. ________________________________________ <MEMINFO> api Sadly, with this api many of the changes were simply a correction of some earlier 'human error' where several fields where hashed then tracked but never represented with an item enumerator in this meminfo.h header file. _______________________________________ <SLABINFO> api The 'SLABS' (summary) & 'SLABNODE' items were reversed since the former are derived from the separate caches. More significantly, those 'SLABNODE' guys were renamed to 'SLAB' since they concern individual caches and the concept of 'nodes' is really an implementation detail. Also, several enumerators were changed to more closely agree with official slabinfo(5) documentation referred to in what we're treating as a base document: proc(5). Lastly, while those 'SLABS' items are solely a product of our library and not represented in slabinfo(5), the names attempt to parallel those found as 'SLAB' items. ______________________________________ <DISKSTATS> api One enumeration identifier was changed so as to better reflect its relationship to that actual documentation: 'Documentation/iostats.txt', as referenced in proc(5). Reference(s): . 12/2018, item origins added (and commit msg history) commit 96d59cbf46b3ff687bd29fad4708074a0e1cea14 . 01/2019, <stat> origins tweaked commit 201e816b26ddaccc923ec40977c92037cdd0c34e Signed-off-by: Jim Warner <james.warner@comcast.net>
2019-03-12 11:30:00 +05:30
htVAL(workingset_restore)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
htVAL(zone_reclaim_failed)
return 0;
#undef htVAL
} // end: vmstat_make_hash_failed
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
/*
* vmstat_read_failed():
*
* Read the data out of /proc/vmstat putting the information
* into the supplied info structure
*/
static int vmstat_read_failed (
struct vmstat_info *info)
{
char buf[VMSTAT_BUFF];
char *head, *tail;
int size;
unsigned long *valptr;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
// remember history from last time around
memcpy(&info->hist.old, &info->hist.new, sizeof(struct vmstat_data));
// clear out the soon to be 'current' values
memset(&info->hist.new, 0, sizeof(struct vmstat_data));
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
if (-1 == info->vmstat_fd
&& (info->vmstat_fd = open(VMSTAT_FILE, O_RDONLY)) == -1)
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
return 1;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
if (lseek(info->vmstat_fd, 0L, SEEK_SET) == -1)
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
return 1;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
for (;;) {
if ((size = read(info->vmstat_fd, buf, sizeof(buf)-1)) < 0) {
if (errno == EINTR || errno == EAGAIN)
continue;
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
return 1;
}
break;
}
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
if (size == 0) {
errno = EIO;
return 1;
}
buf[size] = '\0';
head = buf;
for (;;) {
static ENTRY e; // just to keep coverity off our backs (e.data)
ENTRY *ep;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
tail = strchr(head, ' ');
if (!tail)
break;
*tail = '\0';
valptr = NULL;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
e.key = head;
if (hsearch_r(e, FIND, &ep, &info->hashtab))
valptr = ep->data;
head = tail + 1;
if (valptr)
*valptr = strtoul(head, &tail, 10);
tail = strchr(head, '\n');
if (!tail)
break;
head = tail + 1;
}
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
return 0;
} // end: vmstat_read_failed
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
/*
* vmstat_stacks_alloc():
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
*
* Allocate and initialize one or more stacks each of which is anchored in an
* associated context structure.
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 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 stacks_extent struct anchoring the 'heads' of each new stack.
*/
static struct stacks_extent *vmstat_stacks_alloc (
struct vmstat_info *info,
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
int maxstacks)
{
struct stacks_extent *p_blob;
struct vmstat_stack **p_vect;
struct vmstat_stack *p_head;
size_t vect_size, head_size, list_size, blob_size;
void *v_head, *v_list;
int i;
vect_size = sizeof(void *) * maxstacks; // size of the addr vectors |
vect_size += sizeof(void *); // plus NULL addr delimiter |
head_size = sizeof(struct vmstat_stack); // size of that head struct |
list_size = sizeof(struct vmstat_result)*info->numitems; // 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 a single blob, facilitating a later free(). |
as a minimum, it is important that the result structures themselves always be |
contiguous for every stack since they are accessed through relative position. | */
if (NULL == (p_blob = calloc(1, blob_size)))
return NULL;
p_blob->next = info->extents; // push this extent onto... |
info->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 |
for (i = 0; i < maxstacks; i++) {
p_head = (struct vmstat_stack *)v_head;
p_head->head = vmstat_itemize_stack((struct vmstat_result *)v_list, info->numitems, info->items);
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 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: vmstat_stacks_alloc
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
// ___ 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: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
/*
* procps_vmstat_new:
*
* Create a new container to hold the stat information
*
* 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: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
*/
PROCPS_EXPORT int procps_vmstat_new (
struct vmstat_info **info)
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
{
struct vmstat_info *p;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
if (info == NULL || *info != NULL)
return -EINVAL;
if (!(p = calloc(1, sizeof(struct vmstat_info))))
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
return -ENOMEM;
p->refcount = 1;
p->vmstat_fd = -1;
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
if (vmstat_make_hash_failed(p)) {
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
free(p);
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
return -errno;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
}
/* 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 |
3) elimnate need for history distortions 1st time 'switch' | */
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
if (vmstat_read_failed(p)) {
procps_vmstat_unref(&p);
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
return -errno;
}
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
*info = p;
return 0;
} // end: procps_vmstat_new
PROCPS_EXPORT int procps_vmstat_ref (
struct vmstat_info *info)
{
if (info == NULL)
return -EINVAL;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
info->refcount++;
return info->refcount;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
} // end: procps_vmstat_ref
PROCPS_EXPORT int procps_vmstat_unref (
struct vmstat_info **info)
{
if (info == NULL || *info == NULL)
return -EINVAL;
(*info)->refcount--;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
if ((*info)->refcount < 1) {
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
int errno_sav = errno;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
if ((*info)->extents)
vmstat_extents_free_all((*info));
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
if ((*info)->items)
free((*info)->items);
hdestroy_r(&(*info)->hashtab);
free(*info);
*info = NULL;
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
errno = errno_sav;
return 0;
}
return (*info)->refcount;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
} // end: procps_vmstat_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 vmstat_result *procps_vmstat_get (
struct vmstat_info *info,
enum vmstat_item item)
{
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
static time_t sav_secs;
time_t cur_secs;
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
errno = EINVAL;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 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 >= VMSTAT_logical_end)
return NULL;
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
errno = 0;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
/* we will NOT read the vmstat file with every call - rather, we'll offer
a granularity of 1 second between reads ... */
cur_secs = time(NULL);
if (1 <= cur_secs - sav_secs) {
if (vmstat_read_failed(info))
return NULL;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
sav_secs = cur_secs;
}
info->get_this.item = item;
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
// with 'get', we must NOT honor the usual 'noop' guarantee
info->get_this.result.ul_int = 0;
Item_table[item].setsfunc(&info->get_this, &info->hist);
return &info->get_this;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
} // end: procps_vmstat_get
/* procps_vmstat_select():
*
* Harvest all the requested /proc/vmstat information then return
* it in a results stack.
*
* Returns: pointer to a vmstat_stack struct on success, NULL on error.
*/
PROCPS_EXPORT struct vmstat_stack *procps_vmstat_select (
struct vmstat_info *info,
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
enum vmstat_item *items,
int numitems)
{
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
errno = EINVAL;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
if (info == NULL || items == NULL)
return NULL;
if (vmstat_items_check_failed(numitems, items))
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
return NULL;
library: improve and/or standardize 'errno' management With older library logic having been modified to avoid using those potentially deadly alloc.h routines, while improving 'errno' handling, we're ready to standardize and enhance newlib's approach to any potential errors. In so doing, we'll establish the following objectives: . . . . . . . . . . . . . functions returning an 'int' . an error will be indicated by a negative number that is always the inverse of some well known errno.h value . . . . . . . . . . . functions returning an 'address' . any error will be indicated by a NULL return pointer with the actual reason found in the formal errno value And, when errno is manipulated directly we will strive to do so whenever possible within those routines which have been declared with PROCPS_EXPORT. In other words, in the user callable functions defined in source last. [ But, that won't always be possible. In particular, ] [ all the 'read_failed' functions will sometimes set ] [ 'errno' so that they can serve callers returning a ] [ NULL or an int without duplicating a lot of logic. ] [ Also, that includes one subordinate function which ] [ was called by 'read_failed' in the <slabinfo> API. ] ------------------------------------------------------ Along the way, several additional miscellaneous issues were addressed. They're listed here now for posterity. . the '-1' return value passed outside the library was eliminated since it would erroneously equate to -EPERM . the stacks_fetch functions in <diskstats> and <stat> weren't checked for their possible minus return values . hash create was not checked in <meminfo> or <vmstat> . fixed 'new' function faulty parm check in <slabinfo> Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-11-18 10:30:00 +05:30
errno = 0;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
/* is this the first time or have things changed since we were last called?
if so, gotta' redo all of our stacks stuff ... */
if (info->numitems != numitems + 1
|| memcmp(info->items, items, sizeof(enum vmstat_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 VMSTAT_logical_end
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
if (!(info->items = realloc(info->items, sizeof(enum vmstat_item) * (numitems + 1))))
return NULL;
memcpy(info->items, items, sizeof(enum vmstat_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
info->items[numitems] = VMSTAT_logical_end;
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
info->numitems = numitems + 1;
if (info->extents)
vmstat_extents_free_all(info);
library: vmstat redesign now 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: . Standard copyright boilerplate was added in .c file. . The #include header files are ordered alphabetically now, with all those <sys/??> types separately grouped. . 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: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
if (!info->extents
&& (!vmstat_stacks_alloc(info, 1)))
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
return NULL;
if (vmstat_read_failed(info))
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
return NULL;
vmstat_assign_results(info->extents->stacks[0], &info->hist);
library: normalize/standardize interface, <VMSTAT> api This interface represented a 2nd generation attempt at the opaque newlib approach. In other words, it did not involve the 1st generation 'chains'. Instead, 'stacks' were employed. But the interface wasn't user friendly. Users were required to create their own stacks, before calling 'getstack' to retrieve multiple results with a single call. Even worse, sometimes 'read' was required before calling 'get' when working with single results. So this commit represents the 3rd generation approach. We eliminate the burden of 'read' and creating stacks. Rather, beyond those standard 'new', 'ref' and 'unref' functions, we'll offer just 'get' (single result) plus a 'select' function (for multiple results in 1 stack). And along the way, this commit vastly expands the data extracted from /proc/vmstat. All values that currently exist (and their delta equivalents) are now available. Deltas were included for everything because there's no real runtime costs beyond using a little extra memory. The only problem is a lack of documentation for all of those fields, as is reflected in the references below. Oh well, maybe someday someone will dig through kernel sources & finally plug that rather large document gap. [ as an aside, rather than using a 'strcmp' approach ] [ when parsing the /proc/vmstat file, as is found in ] [ the <meminfo> module, we exploit those hash search ] [ provisions that are found in the <search.h> header ] Reference(s): http://www.spinics.net/lists/linux-man/msg09096.html http://www.linuxinsight.com/proc_vmstat.html Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-04 10:30:00 +05:30
return info->extents->stacks[0];
} // end: procps_vmstat_select
// --- 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) an #include of 'xtra-procps-debug.h' is used
*/
PROCPS_EXPORT struct vmstat_result *xtra_vmstat_get (
struct vmstat_info *info,
enum vmstat_item actual_enum,
const char *typestr,
const char *file,
int lineno)
{
struct vmstat_result *r = procps_vmstat_get(info, actual_enum);
if (actual_enum < 0 || actual_enum >= VMSTAT_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_vmstat_get_
PROCPS_EXPORT struct vmstat_result *xtra_vmstat_val (
int relative_enum,
const char *typestr,
const struct vmstat_stack *stack,
struct vmstat_info *info,
const char *file,
int lineno)
{
char *str;
int i;
for (i = 0; stack->head[i].item < VMSTAT_logical_end; i++)
;
if (relative_enum < 0 || relative_enum >= i) {
fprintf(stderr, "%s line %d: invalid relative_enum = %d, valid range = 0-%d\n"
, file, lineno, relative_enum, i-1);
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];
(void)info;
} // end: xtra_vmstat_val