Message-ID: <53B273A2.5050500@linux.vnet.ibm.com>
Date: Tue, 01 Jul 2014 16:38:58 +0800
From: Michael wang <wangyun@linux.vnet.ibm.com>
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To: Peter Zijlstra <peterz@infradead.org>
CC: Mike Galbraith <umgwanakikbuti@gmail.com>, Rik van Riel <riel@redhat.com>,
        Ingo Molnar <mingo@kernel.org>, Alex Shi <alex.shi@linaro.org>,
        Paul Turner <pjt@google.com>, Mel Gorman <mgorman@suse.de>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] sched: select 'idle' cfs_rq per task-group to prevent
 tg-internal imbalance
References: <53A11A89.5000602@linux.vnet.ibm.com> <20140623094251.GS19860@laptop.programming.kicks-ass.net> <53A8F1DE.2060908@linux.vnet.ibm.com> <20140701082020.GL6758@twins.programming.kicks-ass.net>
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On 07/01/2014 04:20 PM, Peter Zijlstra wrote:
[snip]
>>
>> Just wondering could we make this another scheduler feature?
> 
> No; sched_feat() is for debugging, BIG CLUE: its guarded by
> CONFIG_SCHED_DEBUG, anybody using it in production or anywhere else is
> broken.
> 
> If people are using it, I should remove or at least randomize the
> interface.

Fair enough... but is there any suggestions on how to handle this issue?

Currently when dbench running with stress, it could only gain one CPU,
and cpu-cgroup cpu.shares is meaningless, is there any good methods to
address that?

Regards,
Michael Wang

> 

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