Re: [PATCH v2 00/13] sched/fair/schedutil: Better manage system response time

[Christian Loehle]

On 5/15/26 09:24, Tom Gebhardt wrote:
> Hi Qais,
> 
> Thanks for the follow-up. Here are the patch isolation results and answers to your questions.
> 
> Regarding the governor:
> 
> Yes, I'm running `ondemand`, not `schedutil`. My mistake for not mentioning that upfront - I
> assumed the improvement was due to the util_est path being triggered regardless of the governor.
> The improvement is clearly measurable even with `ondemand`, which is surprising given that your
> patches specifically target `schedutil`.

Something is wrong, as Qais mentioned raspberry pi (SMP) with ondemand shouldn't be affected by
util_est changes. In particular with 4 mostly-running workers and 4 CPUs.
Does patch 12 also show similar effects with powersave/performance cpufreq governor?
Qais also split patch 12 out separately and Vincent posted a fix, care to give that a try?
https://lore.kernel.org/lkml/agRyoe1wHyZ-vMk9@vingu-cube/
Thanks for testing these, I'll try to reproduce what you're seeing, too.

> [snip]