Messages in this thread | | | Subject | Re: [patch v7 0/21] sched: power aware scheduling | From | Mike Galbraith <> | Date | Fri, 12 Apr 2013 18:48:31 +0200 |
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On Fri, 2013-04-12 at 18:23 +0200, Borislav Petkov wrote: > On Fri, Apr 12, 2013 at 04:46:50PM +0800, Alex Shi wrote: > > Thanks a lot for comments, Len! > > AFAICT, you kinda forgot to answer his most important question: > > > These numbers suggest that this patch series simultaneously > > has a negative impact on performance and energy required > > to retire the workload. Why do it?
Hm. When I tested AIM7 compute on a NUMA box, there was a marked throughput increase at the low to moderate load end of the test spectrum IIRC. Fully repeatable. There were also other benefits unrelated to power, ie mitigation of the evil face of select_idle_sibling(). I rather liked what I saw during ~big box test-drive.
(just saying there are other aspects besides joules in there)
-Mike
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