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SubjectRe: Athlon cooling
On Thu, 8 Nov 2001, Joel Jaeggli wrote:

> CONFIG_APM_CPU_IDLE
>
> in the apm setup...
>
> clock throttling is a subject of some debate on the linux kernel list... ;)
> but the apm idle call will at least idle the cpu once the idle loop has
> been running for a while.

Yes, and i believe this is done via judicious use of the 'hlt'
instruction. Also note that on some older K6's there are problems with
this instruction.. namely it halts the machine altogether!

>
> joelja
>
> On Thu, 8 Nov 2001, David Grant wrote:
>
> > There is a program for Windows called CPUIdle, which cools the Athlon
> > tremendoulsy. I can get my temp. from 52C down to 36C. It makes the CPU
> > truly go idle. Is there anything like this for Linux, and I'm wondering if
> > anyone knows the instructions (and/or signals) which could be used to put
> > the Athlon into this state. I guess it's more of a question for some APM
> > guys, but I thought some people here might know the interface to the Athlon,
> > and might thus know how this software cooling works. Actually the low-level
> > apm stuff is part of the kernel right? so maybe this is on-topic.
> >
> > http://www.cpuidle.de/
> >
> > Cheers,
> > David Grant
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>

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