Messages in this thread | | | Date | Wed, 22 Aug 2012 06:02:48 -0700 | From | Arjan van de Ven <> | Subject | Re: [discussion]sched: a rough proposal to enable power saving in scheduler |
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On 8/21/2012 10:41 PM, Mike Galbraith wrote: > On Tue, 2012-08-21 at 17:02 +0100, Alan Cox wrote: > >> I'd like to see actual numbers and evidence on a wide range of workloads >> the spread/don't spread thing is even measurable given that you've also >> got to factor in effects like completing faster and turning everything >> off. I'd *really* like to see such evidence on a laptop,which is your >> one cited case it might work. > > For my dinky dual core laptop, I suspect you're right, but for a more > powerful laptop, I'd expect spread/don't to be noticeable.
yeah if you don't spread, you will waste some power. but.. current linux behavior is to spread. so we can only make it worse.
> > Yeah, hard numbers would be nice to see. > > If I had a powerful laptop, I'd kill irq balancing, and all but periodic > load balancing, and expect to see a positive result.
I'd expect to see a negative result ;-)
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