Re: [RFC] (How to) Let idle CPUs sleep

[Andi Kleen]

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