linux-kernel - Re: [patch v4 08/18] Revert "sched: Introduce temporary FAIR_GROUP

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Message-ID: <511BAFDB.6050908@intel.com>
Date:	Wed, 13 Feb 2013 23:23:07 +0800
From:	Alex Shi <alex.shi@...el.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	torvalds@...ux-foundation.org, mingo@...hat.com,
	tglx@...utronix.de, akpm@...ux-foundation.org,
	arjan@...ux.intel.com, bp@...en8.de, pjt@...gle.com,
	namhyung@...nel.org, efault@....de, vincent.guittot@...aro.org,
	gregkh@...uxfoundation.org, preeti@...ux.vnet.ibm.com,
	viresh.kumar@...aro.org, linux-kernel@...r.kernel.org
Subject: Re: [patch v4 08/18] Revert "sched: Introduce temporary FAIR_GROUP_SCHED
 dependency for load-tracking"

On 02/12/2013 06:27 PM, Peter Zijlstra wrote:
> On Thu, 2013-01-24 at 11:06 +0800, Alex Shi wrote:
>> Remove CONFIG_FAIR_GROUP_SCHED that covers the runnable info, then
>> we can use runnable load variables.
>>
> It would be nice if we could quantify the performance hit of doing so.
> Haven't yet looked at later patches to see if we remove anything to
> off-set this.
> 

In our rough testing, no much clear performance changes.

-- 
Thanks
    Alex
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