Re: [RFC PATCH v3 0/6] sched/cpufreq: Make schedutil energy aware

From: Peter Zijlstra
Date: Mon Oct 14 2019 - 10:53:25 EST


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@xxxxxxx>
> https://lore.kernel.org/lkml/20190620150555.15717-1-patrick.bellasi@xxxxxxx/


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