linux-kernel - Re: a question about p4_clockmod module on Xeon quad core processors

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Message-ID: <314817.91186.qm@web59911.mail.ac4.yahoo.com>
Date:	Thu, 29 Jan 2009 08:12:05 -0800 (PST)
From:	Xiaoning Ding <dingxn@...il.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: a question about p4_clockmod module on Xeon quad core processors

I am not trying to save energy. I want to do some experiments that requires lower CPU speed. But the experiments are not energy related. 

Xiaoning

--- On Tue, 1/27/09, Arjan van de Ven <arjan@...radead.org> wrote:

> From: Arjan van de Ven <arjan@...radead.org>
> Subject: Re: a question about p4_clockmod module on Xeon quad core processors
> To: dingxn@...il.com
> Cc: linux-kernel@...r.kernel.org
> Date: Tuesday, January 27, 2009, 9:23 PM
> On Tue, 27 Jan 2009 12:17:25 -0800 (PST)
> Xiaoning Ding <dingxn@...il.com> wrote:
> 
> > Hi list,
> > 
> > I have tried the p4-clockmod module in Linux kernel
> 2.6.29 on Xeon
> > 5355 quad-core CPUs with no luck. It seems current
> p4-clockmod driver
> > still cannot support Intel Quad core processors,
> right? 
> 
> you know that using clockmod will actually cost you energy
> rather than
> saving it right?
> 
> 
> -- 
> 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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