Re: [RFC][PATCH 1/3] cpuidle: Inject tick boundary state

[Peter Zijlstra]

On Fri, Jul 28, 2023 at 05:36:55PM +0200, Rafael J. Wysocki wrote:
> On Fri, Jul 28, 2023 at 5:01 PM Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> >
> > In order to facilitate governors that track history in idle-state
> > buckets (TEO) making a useful decision about NOHZ, make sure we have a
> > bucket that counts tick-and-longer.
> >
> > In order to be inclusive of the tick itself -- after all, if we do not
> > disable NOHZ we'll sleep for a full tick, the actual boundary should
> > be just short of a full tick.
> >
> > IOW, when registering the idle-states, add one that is always
> > disabled, just to have a bucket.
> 
> This extra bucket can be created in the governor itself, can't it?

I couldn't find a nice spot for the governor to add idle-states.