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SubjectRe: [discussion]sched: a rough proposal to enable power saving in scheduler
On Thu, Aug 16, 2012 at 07:01:25AM -0700, Arjan van de Ven wrote:
> > *Power policy*:
> >
> > So how is power policy different? As Peter says,'pack more than spread
> > more'.
>
> this is ... a dubiously general statement.
>
> for good power, at least on Intel cpus, you want to spread. Parallelism is efficient.

Is this really true? In a two-socket system I'd have thought the benefit
of keeping socket 1 in package C3 outweighed the cost of keeping socket
0 awake for slightly longer.

--
Matthew Garrett | mjg59@srcf.ucam.org

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