Re: [PATCH] sched/debug: Add new tracepoints to track util_est

[Peter Zijlstra]

On Wed, Jun 03, 2020 at 01:04:26PM +0100, Valentin Schneider wrote:
> 
> On 27/05/20 17:39, vincent.donnefort@xxxxxxx wrote:
> > From: Vincent Donnefort <vincent.donnefort@xxxxxxx>
> >
> > The util_est signals are key elements for EAS task placement and
> > frequency selection. Having tracepoints to track these signals enables
> > load-tracking and schedutil testing and/or debugging by a toolkit.
> >
> > Signed-off-by: Vincent Donnefort <vincent.donnefort@xxxxxxx>
> >
> 
> To put it more bluntly, we can't really do task placement / load tracking
> testing if util_est is enabled (which reminds me we may want to get rid of
> the SCHED_FEAT at some point, it's been default on since ~v4.17), since
> there can be noticeable gaps between util_avg and util_est.
> 
> Reviewed-by: Valentin Schneider <valentin.schneider@xxxxxxx>

Thanks!