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Jim Warner ea930f6f9e library <stat>: input file buffer size must be dynamic 
Since its introduction, our evolved /proc/stat API has
relied on a static buffer of 8192 bytes. This approach
is probably Ok for other /proc files but it would only
accommodate around 100 processors. If such a threshold
were exceeded then this interface could never succeed.

Now days 100 processors doesn't seem at all excessive.

So this commit trades that static buffer for a dynamic
self-tuning one. And since so much former top CPU code
was already rolled into this module, we just stole the
already proven top dynamic buffer management code too.

[ this also meant switching low level unbuffered I/O ]
[ calls to standard library buffered I/O calls. that ]
[ is exactly what <slabinfo> and <diskstats> employ. ]

Reference(s):
. 1st gen readstat introduction
commit a410e236ab

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-01-05 06:48:38 +11:00
..
.gitignore tests: update template and add pids 2016-04-19 21:33:02 +10:00
alloc.c library: cleanup of library includes 2016-04-16 17:03:57 +10:00
alloc.h library: cleanup of library includes 2016-04-16 17:03:57 +10:00
COPYING miscellaneous: clean up trailing whitespace once again 2013-04-07 18:05:01 +10:00
devname.c library: find tty device name of process quicker 2016-07-03 10:47:25 +10:00
devname.h library: cleanup of readproc functions 2016-04-17 14:14:27 +10:00
diskstats.c library: eliminate distorted history 1st time switches 2017-01-05 06:48:38 +11:00
diskstats.h library: strictly cosmetic, absolutely no code changes 2016-10-09 21:31:29 +11:00
escape.c library: revert one ancient 'escape_str_utf8' deletion 2016-08-23 21:11:09 +10:00
escape.h library: re-arrange escape commands 2016-04-17 14:45:19 +10:00
libprocps.pc.in
libprocps.sym library: provide for validating result type references 2016-08-07 21:40:48 +10:00
meminfo.c library: eliminate distorted history 1st time switches 2017-01-05 06:48:38 +11:00
meminfo.h library: strictly cosmetic, absolutely no code changes 2016-10-09 21:31:29 +11:00
namespace.c library: ensure 'namespace' types treated consistently 2017-01-04 08:29:44 +11:00
namespace.h library: ensure 'namespace' types treated consistently 2017-01-04 08:29:44 +11:00
pids.c library: protect against possible 'refcount' underflow 2016-12-07 22:06:59 +11:00
pids.h library <stat>: remove that PIDS_WCHAN_ADDR enumerator 2016-10-16 08:23:38 +11:00
procps-private.h library: please keep procps-private.h free of #include 2016-06-11 11:50:37 +10:00
procps.h library: provide for validating result type references 2016-08-07 21:40:48 +10:00
pwcache.c library: rename clashing pwcache functions 2016-06-18 08:17:45 +10:00
pwcache.h library: rename clashing pwcache functions 2016-06-18 08:17:45 +10:00
readproc.c library: normalize & minimize result types, <PIDS> api 2016-08-01 20:09:18 +10:00
readproc.h library: normalize & minimize result types, <PIDS> api 2016-08-01 20:09:18 +10:00
slabinfo.c library <slabinfo>: make read function name consistent 2017-01-05 06:48:38 +11:00
slabinfo.h library: strictly cosmetic, absolutely no code changes 2016-10-09 21:31:29 +11:00
stat.c library <stat>: input file buffer size must be dynamic 2017-01-05 06:48:38 +11:00
stat.h library <stat>: standardized new category calculations 2017-01-04 08:29:44 +11:00
sysinfo.c misc: just eliminate several 'unused' warning messages 2016-07-26 07:59:48 +10:00
sysinfo.h library: remove an obsolete 'jiffs' typedef in sysinfo 2016-05-08 21:12:22 +10:00
test_namespace.c tests: update template and add pids 2016-04-19 21:33:02 +10:00
test_pids.c related: change for lost 'PROCPS_' enumerator prefixes 2016-07-26 20:49:44 +10:00
test_sysinfo.c tests: update template and add pids 2016-04-19 21:33:02 +10:00
test_uptime.c library: procps_uptime() return value is a status 2016-05-01 16:50:25 +10:00
test_version.c library: Fix LINUX_VERSION macro 2016-05-01 17:46:25 +10:00
uptime.c library: procps_uptime() return value is a status 2016-05-01 16:50:25 +10:00
uptime.h library: cleanup of library includes 2016-04-16 17:03:57 +10:00
version.c miscellaneous: remove some trailing whitespace buildup 2015-06-20 07:46:23 +10:00
version.h library: Fix LINUX_VERSION macro 2016-05-01 17:46:25 +10:00
vmstat.c library: eliminate distorted history 1st time switches 2017-01-05 06:48:38 +11:00
vmstat.h library: strictly cosmetic, absolutely no code changes 2016-10-09 21:31:29 +11:00
wchan.c library: don't strip off prefixes from the wchan names 2016-12-07 22:07:00 +11:00
wchan.h library: cleanup of library includes 2016-04-16 17:03:57 +10:00
xtra-procps-debug.h library: strengthen the VAL macro validation functions 2016-08-08 22:01:37 +10:00