Re: [RFC/RFT PATCH v3] sched: automated per tty task groups

[Mike Galbraith]

On Fri, 2010-11-19 at 13:51 +0100, Peter Zijlstra wrote:
> On Fri, 2010-11-19 at 04:31 -0800, Paul Menage wrote:
> > On Fri, Nov 19, 2010 at 3:49 AM, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> wrote:
> > > It must be nice to be that ignorant ;-) Speaking for the scheduler
> > > cgroup controller (that being the only one I actually know), most all
> > > the load-balance operations are O(n) in the number of active cgroups,
> > > and a lot of the cpu local schedule operations are O(d) where d is the
> > > depth of the cgroup tree.
> > 
> > The same would apply to CPU autogroups, presumably?
> 
> Yep, they're not special at all... uses the same mechanism.

The only difference is cost of creation and destruction, so cgroups and
autogroups suck boulders of slightly different diameter when creating
and/or destroying at high frequency.

	-Mike


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