Messages in this thread | | | Date | Wed, 18 Nov 2015 06:10:26 -0800 | From | Jacob Pan <> | Subject | Re: [PATCH 3/4] sched: introduce synchronized idle injection |
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On Wed, 18 Nov 2015 09:36:22 +0100 Ingo Molnar <mingo@kernel.org> wrote:
> > > > This patch introduces a scheduler based idle injection method, it > > works by blocking CFS runqueue synchronously and periodically. The > > actions on all online CPUs are orchestrated by per CPU hrtimers. > > > > Two sysctl knobs are given to the userspace for selecting the > > percentage of idle time as well as the forced idle duration for each > > idle period injected. > > What's the purpose of these knobs? Just testing, or will some > user-space daemon set them dynamically? > yes, it is to be used by userspace daemon such as thermal daemon. Though there are interests from in kernel thermal governor but that is another story.
> I also think that naming it 'idle injection' is pretty euphemistic: > this is forced idling, right? So why not name it CFS_FORCED_IDLE? yes, it is forced idle. sounds good.
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