With this patch, we will be close to an implementation
which will be needed when accommodating tasks/threads.
The following explanation was from an earlier message:
The slabtop requirements are similar to those of PIDs.
One must accommodate the variable number of slab nodes
(PIDs) while also accepting different data (char * and
unsigned long). Furthermore, some generalized means to
sort all that acquired stuff must somehow be provided.
------------------------------------------------------
So this patch expands the API to provide dynamic chain
allocation plus allow sorting of those dynamic chains.
While specific to slab needs (nodes, not global stats)
it is not too early to begin to think of newlib chains
as the opaque replacement for a deprecated old proc_t.
Better yet, any newlib chain is inherently variable in
length, something the old proc_t couldn't claim to be.
Of course, as we get to PIDs we'll want to grow/shrink
chains (easily accomplished with a special item enum).
And we'll want to grow/shrink those **head arrays too.
But these minor details don't seem insurmountable now.
Signed-off-by: Jim Warner <james.warner@comcast.net>
An earlier approach to meminfo chaining, referenced in
the patch shown below, represents the first baby steps
toward the goal of some generalized approach with PIDs
processing. However, statically allocating a chain for
each task or thread is totally impractical. And, while
a single chain could serve all PIDs, that would mean a
separate call to our library for each running process.
This commit is intended as the next evolutionary step,
dynamically allocating some 'result' chains to contain
as many or as few 'items' as a caller wishes. In other
words, holding only those 'items' of current interest.
This is the kind of service useful for both top and ps
programs if we finally get around to /proc/<PID> data.
Reference(s):
commit c3fd7473c5
Signed-off-by: Jim Warner <james.warner@comcast.net>
This was Craig's original patch, referenced below, but
it was never pushed to newlib. It has now been rebased
on top of some diskstat stuff to serve as a beginning.
The original effort was perfectly serviceable (after a
memory leak was fixed) but the approach would not have
served future PID needs when that proc_t went bye bye.
The slabtop requirements are similar to those of PIDs.
One must accommodate the variable number of slab nodes
(PIDs) while also accepting different data (char * and
unsigned long). Furthermore, some generalized means to
sort all that acquired stuff must somehow be provided.
So I wanted to try a different approach that seemed to
hold potential for satisfying future top and ps needs.
Subsequent commits will make that attempt, building on
Craig's original patch whose commit msg appears below.
------------------------------------------------------
All of the /proc/slabinfo related calls have been changed
here. They follow the same procps_slabinfo_* format.
Made both the slabtop and vmstat programs use the new
API as one was using the old one and one was just sort
of trying to do its own thing.
Sorting of slabnodes is also possible via the library.
Reference(s):
http://www.freelists.org/post/procps/Sorting-slabsprocesses,3http://www.freelists.org/post/procps/library-rework-slabinfo-calls
Signed-off-by: Craig Small <csmall@enc.com.au>
Signed-off-by: Jim Warner <james.warner@comcast.net>
The calls for reading diskstat have been moved out of
sysinfo and into new files diskstat.[ch] These new
library calls follow the standard pattern for the
new libprocps.
vmstat is updated to use the new API and also got
the weighted IO time added.
vmstat -p previously would only show partitions, not
disks. There does not appear to be any good reason to
artifically deny a user to use this command on a disk,
rather than a partition so this restriction was lifted.
I also realised using int for devid means you can send
the library negative numbers, the index uses unsigned int.
Other similiar calls will need to be fixed too.
Signed-off-by: Craig Small <csmall@enc.com.au>
This is actually a systemcall getpagesize(2) or it is defined
in configure using a variety of methods, including a default
hard coded value as a last resort.
There is no need to have this in libprocps
Procps library previously held functions that were about either
listing or finding signal names. These are not really the right
location for a library about reading procfs.
This patch handles signal related functions in two ways:
For functions purely found in skill, these have been moved back
into this binary as they are used nowhere else.
For functions used across the binaries, these have been moved
into include/signals.h and lib/signals.c. Besides formatting,
these functions are largely the same.
To assist the skill functions, two functions to access the
signal map array have been added to lib/signals.c
There was not a way I could see to support top's needs
for cpu information with the new 'chained' provisions.
The sheer quantity of such data plus the unpredictable
number of potential processors suggested a totally new
approach was warranted while keeping internals opaque.
So this patch introduces two new structures solely for
use by potential callers (as seen in the API). They're
responsible for providing them to the library which is
then responsible for filling them with requested data.
The top program will continue to provide numa support,
without involving the library in any of those details.
[ not to mention all the 'dl' and 'stderr' numa crap ]
With this transfer of the cpu tics duty to our library
the provision associated with the CPU_ZEROTICS #define
could not initially be migrated. The commit referenced
below suggests it may have lost its importance. In any
case such logic may yet be incorporated in the future.
But for now, that #define has been completely removed.
Reference(s):
commit ee3ed4b45e
Signed-off-by: Jim Warner <james.warner@comcast.net>
If a caller chooses to reduce the overhead of repeated
function calls, this commit provides for acquiring all
the desired information in just a single library call.
Signed-off-by: Jim Warner <james.warner@comcast.net>
This patch mostly just eliminates darn tab characters.
Plus the library function declarations and definitions
have been standardized. Most visibly, the input params
now have all been indented on their own separate line.
The following names were changed to more closely match
meminfo.c or provide a certain symmetry. Unfortunately
that also impacted some other pgms which were updated.
. 'procps_stat_get' evolved into 'procps_stat_get_sys'
. 'procps_stat_info' is now known as 'procps_statinfo'
[and just a little trailing whitespace was eliminated]
Signed-off-by: Jim Warner <james.warner@comcast.net>
If a caller chooses to reduce the overhead of repeated
function calls, this commit provides for acquiring all
the desired information in just a single library call.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Removed the printf_uptime, binaries can do printf easily enough.
sprint_uptime split into two as there wasn't a lot of common
code
sprint_uptime(): old style uptime line
sprint_uptime_short(): short new style "uptime -p"
Hertz_hack needed this, no sane system uses the code (I think)
so just assume 100 like we do in FreeBSD.
Use the standard libc declarations.
For protecting the headers for C++ procps used to have its
own defines, this change makes them use the standard libc ones.
getstat() -> procps_stat_*
vminfo() -> procps_vmstat_*
These two components of the library now use the newer version of
the API with less exposed global variables. The old methods are
there for now.
Signed-off-by: Craig Small <csmall@enc.com.au>
Added function procps_linux_version() which used to be an
exported integer instead. Also changed the method of obtaining
the linux version (more correctly the os release) to use a specific
procfs entry. This works for both Linux and FreeBSD.
Several Debian based distributions were recently found
to have omitted a kernel configuration option that had
the effect of rendering /proc/#/stat and /proc/#/wchan
useless for providing any 'sleeping in function' info.
That problem also prompted a reevaluation of the whole
approach to wchan matters which had grown increasingly
complex as our library evolved over the last 13 years.
The net result was a decision to rely on /proc/#/wchan
which arrived along with the 2.5 kernel. This then let
us vastly simplify the internal code plus the external
interface which will benefit both the top and ps pgms.
Reference(s):
http://www.freelists.org/post/procps/WCHAN,11https://lkml.org/lkml/2008/11/6/12https://bugs.debian.org/711592
Signed-off-by: Jim Warner <james.warner@comcast.net>
It doesn't make any sense to have the binary version strings
embedded into the library. The version strings are defined
already either in the Makefile or in include/c.h
This commit just ensures recalculation of some amounts
for iterative processes, like top. It also trades some
repeated runtime calls to sysconf for a one time cost.
Reference(s):
http://www.freelists.org/post/procps/systemd-support-to-library,7
. fall-back calculations
commit b779855cf1
Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit adds a new switch -a/--available that
appends a new column called 'available' to the
output. The column displays an estimation
of how much memory is available for starting
new applications, without swapping. Unlike the data
provided by the 'cached' or 'free' fields, this
field takes into account page cache and also that
not all reclaimable memory slabs will be reclaimed
due to items being in use.
Each process in Linux has a /proc/<pid>/ns directory which contains
symbolic links to pipes that identify which namespaces that process
belongs to. This patch adds support for ps to display that information
optionally.
Signed-off-by: Aristeu Rozanski <arozansk@redhat.com>
freeproc was missing from the libproc API which meant while you could
allocate proc structures, you couldn't free them!
Bug-Debian: http://bugs.debian.org/681653
Clean the global list of symbols contain only functions and variables which
are being called from library. The removed symbols are internal for the
library, which means they can be changed without changes to programs using
the library. This clean up should help incoming libprocps clean up work.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
The library used to be called libprocps but it was renamed to make sure
there was only one. However the formatting of the library SONAME has
changed so there cannot be any confusion.
libprocps makes it clear that its a library from this project and not a
set of functions directly on the filesystem.
