Messages in this thread | | | Date | Wed, 29 Jun 2005 10:07:26 +0200 | From | Dominik Brodowski <> | Subject | Re: C2/C3 on SMP [Was: Re: 2.6.X not recognizing second CPU] |
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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.
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