linux-kernel - Re: [PATCH v2 0/11] remove cpu

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Message-ID: <5302C754.8000109@linaro.org>
Date:	Tue, 18 Feb 2014 10:37:08 +0800
From:	Alex Shi <alex.shi@...aro.org>
To:	mingo@...hat.com, peterz@...radead.org, morten.rasmussen@....com
CC:	vincent.guittot@...aro.org, daniel.lezcano@...aro.org,
	fweisbec@...il.com, linux@....linux.org.uk, tony.luck@...el.com,
	fenghua.yu@...el.com, james.hogan@...tec.com, alex.shi@...aro.org,
	jason.low2@...com, viresh.kumar@...aro.org, hanjun.guo@...aro.org,
	linux-kernel@...r.kernel.org, tglx@...utronix.de,
	akpm@...ux-foundation.org, arjan@...ux.intel.com, pjt@...gle.com,
	fengguang.wu@...el.com, linaro-kernel@...ts.linaro.org,
	wangyun@...ux.vnet.ibm.com
Subject: Re: [PATCH v2 0/11] remove cpu_load in rq

On 02/17/2014 09:55 AM, Alex Shi wrote:
> The cpu_load decays on time according past cpu load of rq. The sched_avg also decays tasks' load on time. Now we has 2 kind decay for cpu_load. That is a kind of redundancy. And increase the system load by decay calculation. This patch try to remove the cpu_load decay.
> 
> There are 5 load_idx used for cpu_load in sched_domain. busy_idx and idle_idx are not zero usually, but newidle_idx, wake_idx and forkexec_idx are all zero on every arch. A shortcut to remove cpu_Load decay in the first patch. just one line patch for this change.
> 
> V2,
> 1, This version do some tuning on load bias of target load, to maximum match current code logical.
> 2, Got further to remove the cpu_load in rq.
> 3, Revert the patch 'Limit sd->*_idx range on sysctl' since no needs

Any comments for this? :)

> 
> Any testing/comments are appreciated.
> 
> This patch rebase on latest tip/master.
> The git tree for this patchset at:
>  git@...hub.com:alexshi/power-scheduling.git noload
> 
> Thanks
> Alex
> 


-- 
Thanks
    Alex
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