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

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Date:	Thu, 30 May 2013 08:44:16 +0800
From:	Alex Shi <alex.shi@...el.com>
To:	Jason Low <jason.low2@...com>, 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 05/30/2013 01:00 AM, Jason Low wrote:
> On Fri, 2013-05-10 at 23:17 +0800, Alex Shi wrote:
>> blocked_load_avg sometime is too heavy and far bigger than runnable load
>> avg. that make balance make wrong decision. So better don't consider it.
>>
>> Signed-off-by: Alex Shi <alex.shi@...el.com>
> 
> Hi Alex,
> 
> I have been testing these patches with a Java server workload on an 8
> socket (80 core) box with Hyperthreading enabled, and I have been seeing
> good results with these patches.
> 
> When using a 3.10-rc2 tip kernel with patches 1-8, there was about a 40%
> improvement in performance of the workload compared to when using the
> vanilla 3.10-rc2 tip kernel with no patches. When using a 3.10-rc2 tip
> kernel with just patches 1-7, the performance improvement of the
> workload over the vanilla 3.10-rc2 tip kernel was about 25%.
> 
> Tested-by: Jason Low <jason.low2@...com>
> 

That is impressive!

Thanks a lot for your testing! Just curious, what the benchmark are you
using? :)

> Thanks,
> Jason
> 


-- 
Thanks
    Alex
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