linux-kernel - Re: [RFC][PATCH 8/7] sched/fair: Use utilization distance to filter affine sync wakeups

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Message-ID: <1463712778.3723.13.camel@suse.de>
Date:	Fri, 20 May 2016 04:52:58 +0200
From:	Mike Galbraith <mgalbraith@...e.de>
To:	Rik van Riel <riel@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>, mingo@...nel.org,
	linux-kernel@...r.kernel.org
Cc:	clm@...com, matt@...eblueprint.co.uk, tglx@...utronix.de,
	fweisbec@...il.com
Subject: Re: [RFC][PATCH 8/7] sched/fair: Use utilization distance to filter
 affine sync wakeups

On Thu, 2016-05-19 at 17:43 -0400, Rik van Riel wrote:
> On Wed, 2016-05-18 at 07:51 +0200, Mike Galbraith wrote:
> > On Mon, 2016-05-09 at 12:48 +0200, Peter Zijlstra wrote:
> > > Hai,
> > 
> > (got some of the frozen variety handy?:)
> > 
> > > here be a semi coherent patch series for the recent
> > > select_idle_siblings()
> > > tinkering. Happy benchmarking..
> > 
> > And tinkering on top of your rewrite series...
> > 
> > sched/fair: Use utilization distance to filter affine sync wakeups
> > 
> 
> Nice. This looks like it could be a lot more robust
> than the stuff that was there before.

That's the hope.  I kinda doubt it'll make any big difference in the
real world, but should help some.. wild theory being that the 
 microbenchmarks it definitely does help were based at least in part
upon some aspect of real world loads.

	-Mike