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

From: Sitsofe Wheeler
Date: Mon Mar 02 2009 - 11:26:48 EST


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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