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

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Message-ID: <1369846845.6121.6.camel@j-VirtualBox>
Date:	Wed, 29 May 2013 10:00:45 -0700
From:	Jason Low <jason.low2@...com>
To:	Alex Shi <alex.shi@...el.com>, jason.low2@...com
Cc:	mingo@...hat.com, peterz@...radead.org, 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 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>

Thanks,
Jason

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