linux-kernel - Re: [patch v6 8/8] sched: remove blocked_load

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Date:	Tue, 28 May 2013 21:36:13 +0800
From:	Alex Shi <alex.shi@...el.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	mingo@...hat.com, tglx@...utronix.de, akpm@...ux-foundation.org,
	bp@...en8.de, pjt@...gle.com, namhyung@...nel.org, efault@....de,
	morten.rasmussen@....com, vincent.guittot@...aro.org,
	preeti@...ux.vnet.ibm.com, viresh.kumar@...aro.org,
	linux-kernel@...r.kernel.org, mgorman@...e.de, riel@...hat.com,
	wangyun@...ux.vnet.ibm.com
Subject: Re: [patch v6 8/8] sched: remove blocked_load_avg in tg

On 05/16/2013 05:23 PM, Peter Zijlstra wrote:
> On Tue, May 14, 2013 at 07:35:25PM +0800, Alex Shi wrote:
> 
>> > I tested all benchmarks on cover letter maintained, aim7, kbuild etc.
>> > with autogroup enabled. There is no clear performance change.
>> > But since the machine just run benchmark without anyother load, that
>> > doesn't enough.
> Back when we started with smp-fair cgroup muck someone wrote a test for it. I
> _think_ it ended up in the LTP test-suite.

Peter:

copy changlong's testing result again, the ltp cgroup stress testing
show this patchset can reduce the stress testing time:

# run test
7. sudo ./runltp -p -l /tmp/cgroup.results.log  -d /tmp -o
/tmp/cgroup.log -f cgroup

my test results:
3.10-rc1          patch1-7         patch1-8
duration=764   duration=754   duration=750
duration=764   duration=754   duration=751
duration=763   duration=755   duration=751

duration means the seconds of testing cost.

Tested-by: Changlong Xie <changlongx.xie@...el.com>

Paul, would you like to give some comments?

> 
> Now I don't know if that's up-to-date enough to catch some of the cases we've
> recently fixed (as in the past few years) so it might want to be updated.
> 
> Paul, do you guys at Google have some nice test-cases for all this?



-- 
Thanks
    Alex
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