Re: [PATCH v4] cpufreq: schedutil: rate limits for SCHED_DEADLINE

[Rafael J. Wysocki]

On Wednesday, March 14, 2018 2:27:53 AM CET Joel Fernandes wrote:
> On Tue, Mar 13, 2018 at 4:15 AM, Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote:
> > On 13-03-18, 11:35, Claudio Scordino wrote:
> >> When the SCHED_DEADLINE scheduling class increases the CPU utilization,
> >> we should not wait for the rate limit, otherwise we may miss some
> >> deadline.
> >>
> >> Tests using rt-app on Exynos5422 with up to 10 SCHED_DEADLINE tasks have
> >> shown reductions of even 10% of deadline misses with a negligible
> >> increase of energy consumption (measured through Baylibre Cape).
> >>
> >> Signed-off-by: Claudio Scordino <claudio@xxxxxxxxxxxxxxx>
> >> Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
> >> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> >> CC: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> >> CC: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
> >> CC: Patrick Bellasi <patrick.bellasi@xxxxxxx>
> >> CC: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>
> >> CC: Morten Rasmussen <morten.rasmussen@xxxxxxx>
> >> CC: Juri Lelli <juri.lelli@xxxxxxxxxx>
> >> CC: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
> >> CC: Todd Kjos <tkjos@xxxxxxxxxxx>
> >> CC: Joel Fernandes <joelaf@xxxxxxxxxx>
> >> CC: linux-pm@xxxxxxxxxxxxxxx
> >> CC: linux-kernel@xxxxxxxxxxxxxxx
> >> ---
> >> Changes from v3:
> >>  - Specific routine renamed as ignore_dl_rate_limit()
> >
> > LGTM. Thanks.
> 
> Nice! Thanks.

OK, the patch doesn't seem to depend on anything in -tip, so I'm going to
apply it.

Thanks!