linux-kernel - Re: [PATCH 0/6] sched/fair: Compute capacity invariant load/utilization tracking

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Message-ID: <20150816204605.GL10304@worktop.programming.kicks-ass.net>
Date:	Sun, 16 Aug 2015 22:46:05 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Morten Rasmussen <morten.rasmussen@....com>
Cc:	mingo@...hat.com, vincent.guittot@...aro.org,
	daniel.lezcano@...aro.org,
	Dietmar Eggemann <Dietmar.Eggemann@....com>,
	yuyang.du@...el.com, mturquette@...libre.com, rjw@...ysocki.net,
	Juri Lelli <Juri.Lelli@....com>, sgurrappadi@...dia.com,
	pang.xunlei@....com.cn, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/6] sched/fair: Compute capacity invariant
 load/utilization tracking

On Fri, Aug 14, 2015 at 05:23:08PM +0100, Morten Rasmussen wrote:
> Target: ARM TC2 A7-only (x3)
> Test: hackbench -g 25 --threads -l 10000
> 
> Before	After
> 315.545	313.408	-0.68%
> 
> Target: Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz
> Test: hackbench -g 25 --threads -l 1000 (avg of 10)
> 
> Before	After
> 6.4643	6.395	-1.07%

Yeah, so that is a problem.

I'm taking it some of the new scaling stuff doesn't compile away, can we
look at fixing that?
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