Re: [patch] amd athlon cooling on kt266/266a chipset

[Hans-Peter Jansen <hpj@urpla.net>]

On Wednesday, 23. January 2002 21:29, Ed Sweetman wrote:
> On Wed, 2002-01-23 at 15:16, Hans-Peter Jansen wrote:
> > On Tuesday, 22. January 2002 18:15, Daniel Nofftz wrote:
> > > hi there!
> >
> > [...]
> >
> > > if the patch gets a good feedback, maybe it is something for the
> > > official kernel tree ?
> > >
> > > daniel
> >
> > Hi Daniel & folks,
> >
> > just tried your patch on my (diskless) asus a7v133 (kt133) with 1.2 GHz
> > Athlon. I normally had 14% base load spend in apmd-idled and a CPU temp.
> > of 45°C. After getting it to work, I see a base load of around 1% (mostly
> > spend in artsd), but CPU is only 1°-2° less now :-( I hoped, it it
> > would be more). Nevertheless, it is a very important patch nowadays where
> > temperature is the last technical barrier, and energy saving an economic
> > necessity.
> >
> > Many thanks and greetings from Berlin to Trier ;)
> >   Hans-Peter
>
> 1-2 degrees is within the sensor's deviation.   Either you dont have it
> working correctly or it doesn't work at all in your case.

It is working somehow, and the 2 degrees are significant in my case, because
the 45°C is pretty stable in unloaded state with apm enabled. Tmax is around
48°C when compiling kde, transcoding divx or the like.

As noted in another message here, I'am going back to apm because it appears
that vlc became sluggish (& back to 45°C CPU base temp. & ~15% base load
from apmd-idled, I bet :)

>
> You also need acpi idle calls, not just apm.   now this is just my guess
> but apm idle calls might either mess things up or be disabled if acpi
> idle calls are used and disconnecting the cpu... either way  you can't
> have this patch work and apm work at the same time.

I know, and I think Daniel should have noted that one have to disable APM to 
get ACPI power savings work. Would have saved me one reboot..

Cheers,
  Hans-Peter