Re: [PATCH 1/9] Remove parent field in cpuacct cgroup

[Srivatsa Vaddagiri]

* Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> [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).

http://www.redhat.com/archives/libvir-list/2011-April/msg00801.html

> >  Someone that sees 
> > further could maybe help us out here? (but this is sideways to the whole 
> > discussion we're having anyway)
> 
> Would probably do to cc the cpuacct authors in this patch set ;-) I
> think it came from IBM, so I added vatsa.

- vatsa
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