Re: [PATCH v3 09/22] sched: compute runnable load avg in cpu_loadand cpu_avg_load_per_task

From: Mike Galbraith
Date: Tue Jan 22 2013 - 20:47:17 EST


On Wed, 2013-01-23 at 08:36 +0800, Alex Shi wrote:
> On 01/22/2013 05:52 PM, Mike Galbraith wrote:
> > On Tue, 2013-01-22 at 15:50 +0800, Alex Shi wrote:
> >
> >> Thanks for your suggestions and example, Mike!
> >> I just can't understand the your last words here, Sorry. what the
> >> detailed concern of you on 'both performance profiles with either
> >> metric'? Could you like to give your preferred solutions?
> >
> > Hm.. I'll try rephrasing. Any power saving gain will of necessity be
> > paid for in latency currency. I don't have a solution other than make a
> > button, let the user decide whether history influences fast path task
> > placement or not. Any other decision maker will get it wrong.
>
> Um, if no other objection, I'd like to move the runnable load only used
> for power friendly policy -- for this patchset, they are 'powersaving'
> and 'balance', Can I?

Yeah, that should work be fine.

-Mike

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