linux-kernel - Re: [PATCH 7/7] CPU controller V1

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Message-Id: <1156260209.6225.7.camel@Homer.simpson.net>
Date:	Tue, 22 Aug 2006 15:23:29 +0000
From:	Mike Galbraith <efault@....de>
To:	vatsa@...ibm.com
Cc:	Ingo Molnar <mingo@...e.hu>, Nick Piggin <nickpiggin@...oo.com.au>,
	Sam Vilain <sam@...ain.net>, linux-kernel@...r.kernel.org,
	Kirill Korotaev <dev@...nvz.org>,
	Balbir Singh <balbir@...ibm.com>, sekharan@...ibm.com,
	Andrew Morton <akpm@...l.org>, nagar@...son.ibm.com,
	matthltc@...ibm.com, dipankar@...ibm.com
Subject: Re: [PATCH 7/7] CPU controller V1 - (temporary) cpuset interface

On Tue, 2006-08-22 at 14:41 +0000, Mike Galbraith wrote:
> On Tue, 2006-08-22 at 15:40 +0530, Srivatsa Vaddagiri wrote:
> > On Tue, Aug 22, 2006 at 11:10:36AM +0000, Mike Galbraith wrote:
> > > Doesn't seem to work here, but maybe I'm doing something wrong.
> > > 
> > > I set up cpuset "all" containing cpu 0-1 (all, 1.something cpus I have;)
> > 
> > You are assigning all the CPUs to the cpuset "all" and then making it an
> > exclusive/metered cpuset?
> 
> Yeah.
> 
> > I dont think I am handling that case well (yet), primarily because usage of 
> > remaining tasks (which are not in cpuset "all", "mikeg" & "root") is not 
> > accounted/controlled. Note that those remaining tasks will be running on one of 
> > the CPUs assigned to "all". What needs to happen is those remaining tasks need 
> > to be moved to a separate group (and a runqueue), being given some left-over 
> > CPU quota (which is left over from assignment of quota to mikeg and root), 
> > which is not handled in the patches (yet). One of the reason why I havent 
> > handled it yet is that there is no easy way to retrieve list of tasks attached 
> > to a cpuset.
> 
> I try it with everything in either root or mikeg.

That didn't work.

> > Can you try assigning (NUM_CPUS-1) cpus to "all" and give it a shot?
> > Essentially you need to ensure that only tasks chosen by you are running in 
> > cpus given to "all" and other child-cpusets under it.

With only cpu 1 in the cpuset, it worked.

	-Mike

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