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Date8 May 2005 16:53:56 +0200
DateSun, 8 May 2005 16:53:56 +0200
FromAndi Kleen <>
SubjectRe: [RFC] (How to) Let idle CPUs sleep
On Sun, May 08, 2005 at 03:44:14PM +0200, Arjan van de Ven wrote:
> 
> > But it has to be *really* lightweight because these transistion can
> > happen a lot (consider a CPU that very often goes to sleep for a short time)
> 
> lightweight is good of course. But even if it's medium weight.. it just
> means you need to be REALLY idle (eg for longer time) for it to trigger.
> I guess we need some sort of per arch "idleness threshhold" for this.

The question is how useful it is for the hypervisor to even know that.
Why can't it just detect long idle periods by itself if it really wants?

-Andi
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