Messages in this thread | | | Date | Thu, 13 Dec 2018 15:03:58 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v10 10/15] sched: Introduce a sysctl for Energy Aware Scheduling |
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On Tue, Dec 11, 2018 at 02:49:01PM +0000, Quentin Perret wrote: > Hi Ingo, > > On Tuesday 11 Dec 2018 at 15:15:09 (+0100), Ingo Molnar wrote: > > > > * Quentin Perret <quentin.perret@arm.com> wrote: > > > > > In its current state, Energy Aware Scheduling (EAS) starts automatically > > > on asymmetric platforms having an Energy Model (EM). However, there are > > > users who want to have an EM (for thermal management for example), but > > > don't want EAS with it. > > > > Well, then introduce a new Kconfig variant for EAS, if it's super > > important to allow this to be disabled. > > > > Why do we want to disable it - is it not reliable in some circumstances? > > There are people out there using big.little systems who do not care > about energy. Not very many of them, that is true, but they exist. And > those people can be interested in having an Energy Model for > IPA/thermal but also want to spread tasks to minimize latency for > example. So those guys will appreciate a knob, I think. Otherwise EAS > gets enabled/disabled only by side effects (by enabling/disabling > schedutil for example).
Right, also we have a sysctl for numa-balancing, I figured having one for eas would not be weird.
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