linux-kernel - Re: [PATCH -tip] cpuacct: per-cgroup utime/stime statistics

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20090323074750.GB15360@in.ibm.com>
Date:	Mon, 23 Mar 2009 13:17:50 +0530
From:	Bharata B Rao <bharata@...ux.vnet.ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org, Balaji Rao <balajirrao@...il.com>,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Li Zefan <lizf@...fujitsu.com>,
	Paul Menage <menage@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH -tip] cpuacct: per-cgroup utime/stime statistics - v4

On Mon, Mar 23, 2009 at 04:01:12PM +0900, KAMEZAWA Hiroyuki wrote:
> 
> Removet this.
> 
> +- It is possible to see slightly outdated values for stime and utime
> +  due to the batch processing nature of percpu_counter.

This will explain why the stime and utime values for the top cgroup is
different from the ones seen from /proc/stat. Hence I would prefer to have a
mention of it in the documentation.

[root@...11 cgroups]# cat cpuacct.stat ; cat /proc/stat | grep cpu
utime 3110
stime 8410
cpu  3151 2 8336 4051594 2189 0 133 0 0
...

Regards,
Bharata.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/