Re: [RFC 3/4] sched/fair: replace runnable load average by runnable average

[Vincent Guittot]

On Thu, 13 Feb 2020 at 18:36, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
>
> On Tue, Feb 11, 2020 at 06:46:50PM +0100, Vincent Guittot wrote:
> > @@ -367,6 +367,14 @@ struct util_est {
> >   * For cfs_rq, it is the aggregated load_avg of all runnable and
> >   * blocked sched_entities.
> >   *
> > + * [runnable_avg definition]
> > + *
> > + *   runnable_avg = runnable%
>
>                                  * SCHED_CAPACITY_SCALE
>
> right, just like we have for util_avg.
>
> > + *
> > + * where runnable% is the time ratio that a sched_entity is runnable.
> > + * For cfs_rq, it is the aggregated runnable_avg of all runnable and
> > + * blocked sched_entities.
>
> Which is a verbatim repeat of the runnable% definition for load_avg,
> right? Perhaps re-arrange the text such that we only have a single
> definition for each symbol?

yes . will do

>
> > + *
> >   * [util_avg definition]
> >   *
> >   *   util_avg = running% * SCHED_CAPACITY_SCALE
>
> Can you please split this patch in two? First remove everything
> runnable_load_avg, and then introduce runnable_avg.

ok.

>
> I didn't quickly spot anything off, and you're right that runnable vs
> util is an interesting signal.