lkml.org 
[lkml]   [2005]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: C2/C3 on SMP [Was: Re: 2.6.X not recognizing second CPU]
On Wed, Jun 29, 2005 at 09:40:45AM +0200, Erik Slagter wrote:
> On Tue, 2005-06-28 at 23:29 +0200, Dominik Brodowski wrote:
> > On Tue, Jun 28, 2005 at 01:32:59PM +0200, Erik Slagter wrote:
> > > On Mon, 2005-06-27 at 23:42 +0200, Dominik Brodowski wrote:
> > > > a) Power Management is available on SMP, though support for it is a bit less
> > > > wide-spread than it is for UP
> > >
> > > Still no C2/C3 handling :-(
> >
> > Uh, wasn't there a small, nice patch implementing this in bk-acpi a few
> > weeks ago?
> > *clicketyclick* Oh yes,
> > http://bugzilla.kernel.org/show_bug.cgi?id=4401
> > states it was merged into bk-acpi-test on 2005-04-22. However, I can't find
> > it in current -mm any more...
>
> You're probably talking about the amd768 module.

No, I'm not. I'm talking about plain ACPI C-States.

> I could use it, but I
> never got it working correctly, there is no actual power reduction. It
> may have to do with the fast (1000 Hz) 2.6 clock though, making it sleep
> in C2/C3 for only very short intervals. Also the selection for idle
> CPU's seems to be too simple.

The ACPI C-State selection algorithm needs a major overhaul, that's true.

Dominik
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-06-29 10:13    [W:0.383 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site