linux-kernel - Re: [patch v7 0/21] sched: power aware scheduling

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Date:	Tue, 30 Apr 2013 10:30:25 +0200
From:	Mike Galbraith <bitbucket@...ine.de>
To:	Len Brown <lenb@...nel.org>
Cc:	Borislav Petkov <bp@...en8.de>, Alex Shi <alex.shi@...el.com>,
	mingo@...hat.com, peterz@...radead.org, tglx@...utronix.de,
	akpm@...ux-foundation.org, arjan@...ux.intel.com, pjt@...gle.com,
	namhyung@...nel.org, morten.rasmussen@....com,
	vincent.guittot@...aro.org, gregkh@...uxfoundation.org,
	preeti@...ux.vnet.ibm.com, viresh.kumar@...aro.org,
	linux-kernel@...r.kernel.org, len.brown@...el.com,
	rafael.j.wysocki@...el.com, jkosina@...e.cz,
	clark.williams@...il.com, tony.luck@...el.com,
	keescook@...omium.org, mgorman@...e.de, riel@...hat.com,
	Linux PM list <linux-pm@...r.kernel.org>
Subject: Re: [patch v7 0/21] sched: power aware scheduling

On Tue, 2013-04-30 at 07:16 +0200, Mike Galbraith wrote:

> Well now, that's not exactly what I expected to see for AIM7 compute.
> Filesystem is munching cycles otherwise used for compute when load is
> spread across the whole box vs consolidated.

So AIM7 compute performance delta boils down to: powersaving stacks
tasks, so they pat single bit of spinning rust sequentially/gently.

-Mike

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