linux-kernel - Re: [PATCH v7 6/7] sched: replace capacity

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Date:	Fri, 10 Oct 2014 09:18:23 +0200
From:	Vincent Guittot <vincent.guittot@...aro.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>,
	Morten Rasmussen <Morten.Rasmussen@....com>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	LAK <linux-arm-kernel@...ts.infradead.org>,
	Rik van Riel <riel@...hat.com>,
	Mike Galbraith <efault@....de>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Paul Turner <pjt@...gle.com>,
	Benjamin Segall <bsegall@...gle.com>
Subject: Re: [PATCH v7 6/7] sched: replace capacity_factor by usage

On 10 October 2014 09:17, Vincent Guittot <vincent.guittot@...aro.org> wrote:
>
> yes i think it latter because it give a more stable view of the

s/latter/matter/

> "overload state" and "have  free capacity state" of the CPU.
> One additional point is that the imbalance_pct will ensure that a
> cpu/group will not been seen as having capacity if its available
> capacity is only 1-5% which will generate spurious task migration
>
> I will add these details in the commit log and in a comment in the code
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