linux-kernel - Re: 2.6.28 - 2.6.29-rc6-git5 regression, p4-clockmod/cpufreq probably

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Date:	Mon, 2 Mar 2009 16:26:21 +0000
From:	Sitsofe Wheeler <sitsofe@...oo.com>
To:	Denys Fedoryschenko <denys@...p.net.lb>
Cc:	Matthew Garrett <mjg@...hat.com>, linux-kernel@...r.kernel.org,
	"Rafael J. Wysocki" <rjw@...k.pl>, cpufreq@...r.kernel.org,
	davej@...hat.com
Subject: Re: 2.6.28 - 2.6.29-rc6-git5 regression, p4-clockmod/cpufreq probably

On Mon, Mar 02, 2009 at 06:15:56PM +0200, Denys Fedoryschenko wrote:
> On Monday 02 March 2009 18:06:59 Matthew Garrett wrote:
> > On Mon, Mar 02, 2009 at 05:04:59PM +0200, Denys Fedoryschenko wrote:
> > > On 2.6.29-rc6 (git5 tested also) also shown in dmesg as available, but i
> > > can't change anything.
> >
> > That's deliberate. p4-clockmod is for thermal management, not clock
> > control (since it doesn't actually do any of that)
> I know very well it is just throttling, and not real CPU power management.
> At the end it does job.
> 
> In my case i used it for testing on "virtual" 113 Mhz video encoding to find 
> out bottleneck on ffmpeg and to compare performance with Blackfin.

If it's just throttling you want can't you do that via
/proc/acpi/processor/CPU<N>/throttling ...

-- 
Sitsofe | http://sucs.org/~sits/
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