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

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Message-ID: <1404193267.5159.28.camel@marge.simpson.net>
Date:	Tue, 01 Jul 2014 07:41:07 +0200
From:	Mike Galbraith <umgwanakikbuti@...il.com>
To:	Michael wang <wangyun@...ux.vnet.ibm.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 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.

-Mike

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