From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Balbir Singh <bsingharora@gmail.com>
Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
Glauber Costa <glommer@parallels.com>,
linux-kernel@vger.kernel.org, xemul@parallels.com,
paul@paulmenage.org, lizf@cn.fujitsu.com, daniel.lezcano@free.fr,
mingo@elte.hu, jbottomley@parallels.com
Subject: Re: [PATCH 1/9] Remove parent field in cpuacct cgroup
Date: Thu, 22 Sep 2011 17:17:17 +0200 [thread overview]
Message-ID: <1316704637.31429.25.camel@twins> (raw)
In-Reply-To: <CAKTCnzk=i1a3DHrforcaOCBdhjv1xi=5W=eiJiZoK4BNb3wqVw@mail.gmail.com>
On Thu, 2011-09-22 at 20:41 +0530, Balbir Singh wrote:
> On Tue, Sep 20, 2011 at 10:59 PM, Srivatsa Vaddagiri
> <vatsa@linux.vnet.ibm.com> wrote:
> > * Peter Zijlstra <a.p.zijlstra@chello.nl> [2011-09-19 20:40:53]:
> >
> >> > Note I was talking about cpuusage. Well, in this case, I myself fail
> >> > to see the value of the whole cpuusage thing...
> >
> > If I recall, cpuacct was prototyped by Paul Menage (and later modified
> > by Balbir) as a way to demonstrate cgroup controller ..It was one
> > of those "first" cgroups controllers written to demonstrate how cgroups worked.
> >
> > With regard to its value, it does provide a handy interface to measure
> > cpu utilization of cgroups (vs having to manually sum up task's
> > utilization) and afaik libvirt makes use of it (although I
> > don't think anyone reads it at "high" frequency).
> >
>
> Android makes heavy use of cpuacct as well. We invented it to do cpu
> accounting independent of control
But its a massive waste of time to have to iterate a double hierarchy,
cache-miss heaven.
Or so people really have independent cgroups as well? I thought people
just co-mount all this crap.
next prev parent reply other threads:[~2011-09-22 15:18 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-14 20:04 [PATCH 0/9] Per-cgroup /proc/stat Glauber Costa
2011-09-14 20:04 ` [PATCH 1/9] Remove parent field in cpuacct cgroup Glauber Costa
2011-09-19 16:03 ` Peter Zijlstra
2011-09-19 16:09 ` Glauber Costa
2011-09-19 16:19 ` Peter Zijlstra
2011-09-19 16:30 ` Glauber Costa
2011-09-19 16:39 ` Peter Zijlstra
2011-09-19 16:41 ` Glauber Costa
2011-09-19 18:40 ` Peter Zijlstra
2011-09-20 17:29 ` Srivatsa Vaddagiri
2011-09-22 15:11 ` Balbir Singh
2011-09-22 15:17 ` Peter Zijlstra [this message]
2011-09-23 8:09 ` Balbir Singh
2011-09-23 14:35 ` Peter Zijlstra
2011-09-23 15:45 ` Glauber Costa
2011-09-19 18:35 ` Peter Zijlstra
2011-09-19 18:38 ` Glauber Costa
2011-09-19 18:44 ` Peter Zijlstra
2011-09-19 19:14 ` Glauber Costa
2011-09-19 19:18 ` Peter Zijlstra
2011-09-19 19:19 ` Glauber Costa
2011-09-14 20:04 ` [PATCH 2/9] Make cpuacct fields per cpu variables Glauber Costa
2011-09-19 16:10 ` Peter Zijlstra
2011-09-14 20:04 ` [PATCH 3/9] Include nice values in cpuacct Glauber Costa
2011-09-19 16:19 ` Peter Zijlstra
2011-09-19 16:26 ` Glauber Costa
2011-09-19 18:36 ` Peter Zijlstra
2011-09-19 18:37 ` Glauber Costa
2011-09-14 20:04 ` [PATCH 4/9] Include irq and softirq fields " Glauber Costa
2011-09-19 18:38 ` Peter Zijlstra
2011-09-19 18:40 ` Glauber Costa
2011-09-14 20:04 ` [PATCH 5/9] Include guest " Glauber Costa
2011-09-14 20:04 ` [PATCH 6/9] Include idle and iowait " Glauber Costa
2011-09-20 9:21 ` Peter Zijlstra
2011-09-20 12:36 ` Glauber Costa
2011-09-20 12:58 ` Peter Zijlstra
2011-09-20 12:58 ` Glauber Costa
2011-09-20 13:05 ` Peter Zijlstra
2011-09-20 13:29 ` Glauber Costa
2011-09-14 20:04 ` [PATCH 7/9] Create cpuacct.proc.stat file Glauber Costa
2011-09-20 9:22 ` Peter Zijlstra
2011-09-20 12:22 ` Glauber Costa
2011-09-14 20:04 ` [PATCH 8/9] per-cgroup boot time Glauber Costa
2011-09-20 9:25 ` Peter Zijlstra
2011-09-20 12:37 ` Glauber Costa
2011-09-20 13:04 ` Peter Zijlstra
2011-09-20 13:06 ` Glauber Costa
2011-09-20 13:31 ` Peter Zijlstra
2011-09-14 20:04 ` [PATCH 9/9] Report steal time for cgroup Glauber Costa
2011-09-20 9:29 ` Peter Zijlstra
2011-09-14 20:13 ` [PATCH 0/9] Per-cgroup /proc/stat Peter Zijlstra
2011-09-14 20:20 ` Glauber Costa
2011-09-15 8:53 ` Peter Zijlstra
2011-09-14 20:23 ` Andi Kleen
2011-09-15 8:56 ` Peter Zijlstra
2011-09-19 23:07 ` Paul Turner
2011-09-20 8:33 ` Peter Zijlstra
2011-09-20 21:37 ` Glauber Costa
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