linux-kernel - Re: [ISSUE] sched/cgroup: Does cpu-cgroup still works fine nowadays?

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Date:	Fri, 16 May 2014 04:51:30 +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>,
	LKML <linux-kernel@...r.kernel.org>,
	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>
Subject: Re: [ISSUE] sched/cgroup: Does cpu-cgroup still works fine nowadays?

On Fri, 2014-05-16 at 10:23 +0800, Michael wang wrote:

> But we found that one difference when group get deeper is the tasks of
> that group become to gathered on CPU more often, some time all the
> dbench instances was running on the same CPU, this won't happen for l1
> group, may could explain why dbench could not get CPU more than 100% any
> more.

Right.  I played a little (sane groups), saw load balancing as well.

-Mike

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