linux-kernel - Re: PATCH] cpuidle: A new variant of the menu governor to boost IO performance

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Message-ID: <20090912052647.3b6dcb78@infradead.org>
Date:	Sat, 12 Sep 2009 05:26:47 +0200
From:	Arjan van de Ven <arjan@...radead.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	linux-kernel@...r.kernel.org, lenb@...nel.org, mingo@...e.hu,
	akpm@...ux-foundation.org, peterz@...radead.org,
	yanmin_zhang@...ux.intel.com, torvalds@...ux-foundation.org,
	jens.axboe@...cle.com
Subject: Re: PATCH] cpuidle: A new variant of the menu governor to boost IO
 performance

On Fri, 11 Sep 2009 23:03:09 +0100
Matthew Garrett <mjg59@...f.ucam.org> wrote:

> When you say that a bit more power was used, is that instantaneous
> power draw or total power consumption over the run of the benchmark?
> I'd have expected that completing it 50% faster and then going idle
> would be a win overall.

I meant power, not total energy :-)

in terms of energy it's a win if you only do a fixed amount of work...

> 


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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