linux-kernel - Re: [PATCH] sched: select 'idle' cfs_rq per task-group to prevent tg-internal imbalance

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Message-ID: <53B250BD.9080808@linux.vnet.ibm.com>
Date:	Tue, 01 Jul 2014 14:10:05 +0800
From:	Michael wang <wangyun@...ux.vnet.ibm.com>
To:	Mike Galbraith <umgwanakikbuti@...il.com>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Rik van Riel <riel@...hat.com>,
	Ingo Molnar <mingo@...nel.org>, Alex Shi <alex.shi@...aro.org>,
	Paul Turner <pjt@...gle.com>, Mel Gorman <mgorman@...e.de>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sched: select 'idle' cfs_rq per task-group to prevent
 tg-internal imbalance

On 07/01/2014 01:41 PM, Mike Galbraith wrote:
> On Tue, 2014-07-01 at 10:57 +0800, Michael wang wrote:
> 
>> IMHO, currently the generic scheduler just try to take care both latency
>> and throughput, both will take a little damage but won't be damaged too
>> much, they just sacrificed for each other...
> 
> The cost can be large, so it's worth an occasional ponder.

Sure, if there are some useless efforts there, we'll locate them anyway,
sooner or later ;-)

Regards,
Michael Wang

> 
> -Mike
> 
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