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Date:   Mon, 14 Oct 2019 16:53:15 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Douglas RAILLARD <douglas.raillard@arm.com>
Cc:     linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
        mingo@redhat.com, rjw@rjwysocki.net, viresh.kumar@linaro.org,
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        dietmar.eggemann@arm.com, qperret@qperret.net,
        patrick.bellasi@matbug.net, dh.han@samsung.com
Subject: Re: [RFC PATCH v3 0/6] sched/cpufreq: Make schedutil energy aware
Message-ID: <20191014145315.GZ2311@hirez.programming.kicks-ass.net>
References: <20191011134500.235736-1-douglas.raillard@arm.com>
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On Fri, Oct 11, 2019 at 02:44:54PM +0100, Douglas RAILLARD wrote:
> This has been ligthly tested with a rtapp task ramping from 10% to 75%
> utilisation on a big core. Results are improved by fast ramp-up
> EWMA [1], since it greatly reduces the oscillation in frequency at first
> idle when ramping up.
> 
> [1] [PATCH] sched/fair: util_est: fast ramp-up EWMA on utilization increases
>     Message-ID: <20190620150555.15717-1-patrick.bellasi@arm.com>
>     https://lore.kernel.org/lkml/20190620150555.15717-1-patrick.bellasi@arm.com/


I don't really see anything fundamentally weird here. Any actual numbers
or other means of quantifying the improvement these patches bring?