Re: [PATCH] sched/fair: Fix pelt lost idle time detection

[Samuel Wu]

On Tue, Jan 20, 2026 at 12:36 AM Vincent Guittot
<vincent.guittot@xxxxxxxxxx> wrote:
>
> On Tue, 20 Jan 2026 at 06:46, Alex Hoh (賀振坤) <Alex.Hoh@xxxxxxxxxxxx> wrote:
> >
> > On Fri, 2026-01-16 at 17:13 +0100, Vincent Guittot wrote:
> > > Le vendredi 16 janv. 2026 à 15:21:35 (+0100), Vincent Guittot a écrit
> > > :
> > > > Hi Alex,
>
> [..]
>
> >
> > This fix looks good to me, and in my local testing,
> > RT utilization dropped significantly from 72 to 20.
>
> Thanks for your tests. Let see if this fixes Samuel's regression too
> and I will prepare a patch
>

Thanks Vincent- fix also looks good to me, with RT util and power both
dropped significantly and within baseline levels.

For completeness, here is Perfetto trace with this latest fix:
https://ui.perfetto.dev/#!/?s=f82243599e7a3e590ab91a1b3a7e15e3c17f481d

Feel free to add these tags as appropriate:
Reported-by: Samuel Wu <wusamuel@xxxxxxxxxx>
Tested-by: Samuel Wu <wusamuel@xxxxxxxxxx>