linux-kernel - Re: [PATCH v2] cpuidle: Fix the menu governor to boost IO performance

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Message-ID: <4AAF2037.1030300@redhat.com>
Date:	Tue, 15 Sep 2009 01:03:51 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Arjan van de Ven <arjan@...radead.org>
CC:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>, lenb@...nel.org,
	mingo@...e.hu, yanmin_zhang@...ux.intel.com, jens.axboe@...cle.com,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>
Subject: Re: [PATCH v2] cpuidle: Fix the menu governor to boost IO performance

Arjan van de Ven wrote:

> 		no cstates	current linux	new algorithm
> 1 disk		107 Mb/s	85 Mb/s		105 Mb/s
> 2 disks		215 Mb/s	123 Mb/s	209 Mb/s
> 12 disks	590 Mb/s	320 Mb/s	585 Mb/s

That is huge!  Should this go into -stable too?

> Signed-off-by: Arjan van de Ven <arjan@...ux.intel.com>
> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
> Cc: Len Brown <lenb@...nel.org>
> Cc: Ingo Molnar <mingo@...e.hu>
> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> Cc: Yanmin Zhang <yanmin_zhang@...ux.intel.com>
> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>

Acked-by: Rik van Riel <riel@...hat.com>

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