Re: Bug#110273: ITP: lvcool -- "cools" the AMD K7 (Athlon/Duron) CPU
#include <hallo.h>
Andreas Bombe wrote on Tue Aug 28, 2001 um 11:48:49PM:
> > > No, it won't. The disconnect is disabled by most BIOSes for various
> > > reasons[1] and ACPI essentially just executes BIOS provided bytecode.
> >
> > Exactly.
>
> Yep, ACPI will do STPGNT by itself.
What, the disconnect? This must be enabled explicitely using the special
register in the northbridge of KT133(A).
> All lvcool adds is setting 1 (in words: one) bit in a hardware register
> once. Do we really have to add another Debian package to the thousands
> just for setting one bit?
If you really want to include this in the kernel, please do. As said
before, our stable kernel does not use ACPI, and there are some reasons
for _not_ using the whole ACPI support even when if it is available.
> I'm not sure whether APM handles the STPGNT mode. I guess it depends on
> the BIOS again.
AFAIK it does not. Only ACPI manager can change to STPGNT, and this
without the clock disconnect.
> Now to your comparison kapm-idled/lvcool timeslices. The APM code uses
> insight into the scheduling situation to idle only when no processes are
> ready to run. This may cause it not to idle constantly with certain
Exactly.
> program run patterns. If you want it to idle more often, just remove
> the checks.
Where are this checks? I cannot find the part quickly, please point me
to it.
> run its idle loop even under 100% CPU load, taking away cycles from your
> kernel compile/quake/<insert favourite CPU hog>.
Yes, this is a known issue, but let the decission to the user, okay?
Gruss/Regards,
Eduard.
--
Der menschliche Starrsinn ist unaufhaltsam.
-- Doris Eichert
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