linux-kernel - Re: [PATCH 0/7] Fix performance issue with ondemand governor

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Date:	Mon, 26 Apr 2010 23:45:34 +0200
From:	Dominik Brodowski <linux@...inikbrodowski.net>
To:	Dave Jones <davej@...hat.com>,
	Arjan van de Ven <arjan@...radead.org>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	mingo@...e.hu, peterz@...radead.org, tglx@...utronix.de,
	cpufreq@...r.kernel.org
Subject: Re: [PATCH 0/7] Fix performance issue with ondemand governor

On Mon, Apr 26, 2010 at 05:41:56PM -0400, Dave Jones wrote:
> On Sun, Apr 18, 2010 at 11:59:49AM -0700, Arjan van de Ven wrote:
>  > There have been various reports of the ondemand governor causing some
>  > serious performance issues, one of the latest ones from Andrew.
>  > There are several fundamental issues with ondemand (being worked on),
>  > but the report from Andrew can be fixed relatively easily.
>  > 
>  > The fundamental issue is that ondemand will go to a (too) low CPU
>  > frequency for workloads that alternatingly disk and CPU bound...
> 
> given the scheduler changes, these probably make more sense to go
> via one of Ingo's trees ?
> If everyone agrees, feel free to add my Signed-off-by:

What about the issue Pavel reported and Willy confirmed (regression
on older hardware)?

Best,
	Dominik
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