Re: acpi-cpufreq; Intel Johnstown (Atom N270)

[Forest Bond <forest@alittletooquiet.net>]

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Hi,

On Thu, Aug 13, 2009 at 03:07:41PM -0400, Dave Jones wrote:
> On Thu, Aug 13, 2009 at 02:29:08PM -0400, Forest Bond wrote:
>  > Hi,
>  > 
>  > On Thu, Aug 13, 2009 at 01:25:57PM -0400, Forest Bond wrote:
>  > > I'm using an Intel Johnstown board with an Atom N270 processor.  Performance
>  > > seems to improve dramatically with acpi-cpufreq loaded.  This caught me by
>  > > surprise.  I had assumed that without loading acpi-cpufreq the CPU would be
>  > > running at its maximum speed all the time.
>  > 
>  > I ran some tests to get some numbers.  My findings indicate that before
>  > acpi-cpufreq is loaded the CPU is running at 800MHz even though /proc/cpuinfo
>  > indicates 1.6GHz.
> 
> if no cpufreq modules have been loaded, the CPU will be running at whatever
> p-state the BIOS programmed it to start up at. In your case for some reason, that's
> the 'slow' speed. 

Okay, that's what I figured.

Looks like there's some BIOS settings that may have an effect.  I'll play with
those.

Thanks,
Forest
-- 
Forest Bond
http://www.alittletooquiet.net
http://www.pytagsfs.org

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