Messages in this thread |  | | | Date | Fri, 17 Aug 2012 19:41:00 +0100 | | From | Matthew Garrett <> | | Subject | Re: [discussion]sched: a rough proposal to enable power saving in scheduler |
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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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