lkml.org 
[lkml]   [2010]   [Nov]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subject[patch v2 0/4] taskstats: Improve cumulative time accounting
Version 2
---------
* Integrate review comments (see change log of single patches)
* Add sysctl to switch to new behavior instead of adding the
additional cdata_acct to struct signal (see patch 3)

Due to POSIX POSIX.1-2001, the CPU time of processes is not accounted
to the cumulative time of the parents, if the parents ignore SIGCHLD
or have set SA_NOCLDWAIT. This behaviour has the major drawback that
it is not possible to calculate all consumed CPU time of a system by
looking at the current tasks. CPU time can be lost.

This patch series adds a new sysctl "full_cdata" that allows to switch
the kernel to a mode where also the missing data is accounted to the
cumulative counters.

PATCH SET OVERVIEW
------------------
Patches apply on:
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

[1] Introduce "struct cdata"
[2] Introduce __account_cdata() function
[3] Introduce kernel.full_cdata sysctl
[4] Export "cdata_wait" CPU times with taskstats


\
 
 \ /
  Last update: 2010-11-29 17:47    [W:0.090 / U:0.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site