linux-kernel - Re: [PATCH v5 6/7] sched: consider runnable load average in move

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Date:	Fri, 10 May 2013 22:03:12 +0800
From:	Alex Shi <alex.shi@...el.com>
To:	Paul Turner <pjt@...gle.com>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Borislav Petkov <bp@...en8.de>,
	Namhyung Kim <namhyung@...nel.org>,
	Mike Galbraith <efault@....de>,
	Morten Rasmussen <morten.rasmussen@....com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Michael Wang <wangyun@...ux.vnet.ibm.com>
Subject: Re: [PATCH v5 6/7] sched: consider runnable load average in move_tasks

On 05/09/2013 01:29 PM, Alex Shi wrote:
> 
> I reviewed the cfs_rq->blocked_load_avg code path, no clear abnormal found.
> Seems the blocked load avg is fit current balance rules.

Sorry, I mean, the blocked load avg doesn't fit current balance rules.
The reason is blow, any comments on this?
> Sometime the blocked load far bigger than runnable load. The blocked_load_avg 
> has a long time effect(more than half weight in 32ms), that drives wakeup task to other
> cpus not locate, and give unnecessary load in periodic balance, isn't it?


-- 
Thanks
    Alex
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