Messages in this thread | | | Date | Sat, 9 Apr 2016 14:31:22 +0200 | Subject | Re: [regression] cross core scheduling frequency drop bisected to 0c313cb20732 | From | "Rafael J. Wysocki" <> |
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On Sat, Apr 9, 2016 at 1:07 PM, Peter Zijlstra <peterz@infradead.org> wrote: > On Fri, Apr 08, 2016 at 10:59:59PM +0200, Rafael J. Wysocki wrote: >> On Friday, April 08, 2016 08:50:54 AM Mike Galbraith wrote: >> > On Fri, 2016-04-08 at 08:45 +0200, Peter Zijlstra wrote: >> > >> > > Cute, I thought you used governor=performance for your runs? >> > >> > I do, and those numbers are with it thus set. >> >> Well, this is a trade-off. >> >> 4.5 introduced a power regression here so this one goes back to the previous >> state of things. > > Just for my elucidation; how can gov=performance have a 'power' > regression?
Because of what is used as the "default" idle state most of the time.
C1 was used before 4.5 and that changed to polling in 4.5.
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