Re: [PATCH v6 04/11] cpufreq/schedutil: use rt utilization tracking

From: Peter Zijlstra
Date: Fri Jun 22 2018 - 10:46:16 EST


On Fri, Jun 22, 2018 at 03:57:24PM +0200, Vincent Guittot wrote:
> On Fri, 22 Jun 2018 at 15:54, Vincent Guittot
> <vincent.guittot@xxxxxxxxxx> wrote:
> > On Fri, 22 Jun 2018 at 15:26, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> > > And that is my objection to that straight sum thing; there the dl util
> > > distorts the computed dl bandwidth thing even if there is no cfs
> > > utilization.
> >
> > hmm,
>
> forgot to finish this sentence
>
> hmm, dl util_avg is only used to detect is there is idle time so if
> cfs util is nul we will not distort the dl bw (for a use case where
> there is no rt task running)

Hurm.. let me apply those patches and read the result, because I think I
missed something.