linux-kernel - Re: [PATCH v3 5/6] cpufreq: schedutil: relax rate-limiting while running RT/DL tasks

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Message-ID: <20171130160627.GJ9903@localhost.localdomain>
Date:   Thu, 30 Nov 2017 17:06:27 +0100
From:   Juri Lelli <juri.lelli@...hat.com>
To:     Patrick Bellasi <patrick.bellasi@....com>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Todd Kjos <tkjos@...roid.com>,
        Joel Fernandes <joelaf@...gle.com>
Subject: Re: [PATCH v3 5/6] cpufreq: schedutil: relax rate-limiting while
 running RT/DL tasks

On 30/11/17 15:54, Patrick Bellasi wrote:
> On 30-Nov 14:36, Juri Lelli wrote:

[...]

> > I wonder if we would also need some way to trigger a back to back update
> > as soon as a currently running one finishes and an RT/DL task asked for
> > an update (without waiting for the next tick).
> 
> Good point, I think that would actually be an interesting
> optimization. We already discussed that in the past, but refrained by
> adding more on top of this already "substantial" set of changes.
> 
> Can we think about that once we decided about some patches of this
> series?

Definitely yes for me. One bit at a time. :)

Best,

Juri