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Date: Tue, 13 Mar 2018 16:45:06 +0530
From: Viresh Kumar <viresh.kumar@linaro.org>
To: Claudio Scordino <claudio@evidence.eu.com>
Cc: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
        Patrick Bellasi <patrick.bellasi@arm.com>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        Morten Rasmussen <morten.rasmussen@arm.com>,
        Juri Lelli <juri.lelli@redhat.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Todd Kjos <tkjos@android.com>, Joel Fernandes <joelaf@google.com>,
        linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4] cpufreq: schedutil: rate limits for SCHED_DEADLINE
Message-ID: <20180313111506.GC15832@vireshk-i7>
References: <1520937340-2755-1-git-send-email-claudio@evidence.eu.com>
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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@evidence.eu.com>
> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> CC: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> CC: Viresh Kumar <viresh.kumar@linaro.org>
> CC: Patrick Bellasi <patrick.bellasi@arm.com>
> CC: Dietmar Eggemann <dietmar.eggemann@arm.com>
> CC: Morten Rasmussen <morten.rasmussen@arm.com>
> CC: Juri Lelli <juri.lelli@redhat.com>
> CC: Vincent Guittot <vincent.guittot@linaro.org>
> CC: Todd Kjos <tkjos@android.com>
> CC: Joel Fernandes <joelaf@google.com>
> CC: linux-pm@vger.kernel.org
> CC: linux-kernel@vger.kernel.org
> ---
> Changes from v3:
>  - Specific routine renamed as ignore_dl_rate_limit()

LGTM. Thanks.

-- 
viresh