linux-kernel - Re: [PATCH V3 0/2] sched: Align uclamp and util

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Message-ID: <CAB8ipk9bLmnVYnjggw-Ymp6sZiO9SHJ-XZBNRj0Bv3taYSRM2w@mail.gmail.com>
Date: Tue, 20 May 2025 13:59:36 +0800
From: Xuewen Yan <xuewen.yan94@...il.com>
To: Dietmar Eggemann <dietmar.eggemann@....com>
Cc: Xuewen Yan <xuewen.yan@...soc.com>, vincent.guittot@...aro.org, mingo@...hat.com, 
	peterz@...radead.org, juri.lelli@...hat.com, rostedt@...dmis.org, 
	bsegall@...gle.com, mgorman@...e.de, vschneid@...hat.com, 
	hongyan.xia2@....com, linux-kernel@...r.kernel.org, ke.wang@...soc.com, 
	di.shen@...soc.com, kprateek.nayak@....com, kuyo.chang@...iatek.com, 
	juju.sung@...iatek.com, qyousef@...alina.io
Subject: Re: [PATCH V3 0/2] sched: Align uclamp and util_est

Gentle ping if forgotten.

Sorry to ask, but may I know if this patch can be merged into the mainline?

Thanks!

On Tue, Apr 22, 2025 at 11:27 PM Dietmar Eggemann
<dietmar.eggemann@....com> wrote:
>
> On 17/04/2025 06:34, Xuewen Yan wrote:
> > Now, both uclamp and util_est have been adapted for DELAYED_DEQUEUE,
> > and the double enqueue/dequeue issue no longer exists.
> > However, there is still room for optimization in both uclamp and util_est.
> > Previous discussions as following:
> > https://lore.kernel.org/all/CAB8ipk8pEvOtCm-d0o1rsekwxPWUHk9iBGtt9TLTWW-iWTQKiA@mail.gmail.com/
> > https://lore.kernel.org/all/84441660bef0a5e67fd09dc3787178d0276dad31.1740664400.git.hongyan.xia2@arm.com/T/#u
> > https://lore.kernel.org/all/CAB8ipk9LpbiUDnbcV6+59+Sa=Ai7tFzO===mpLD3obNdV4=J-A@mail.gmail.com/T/#u
> > https://lore.kernel.org/all/aa8baf67-a8ec-4ad8-a6a8-afdcd7036771@arm.com/
> > https://lore.kernel.org/all/20250325014733.18405-1-xuewen.yan@unisoc.com/
> >
> > patch[1]: Simply the condition for util_est_dequeue/enqueue;
> > patch[2] aligns uclamp and util_est and call before freq update to improve
> > the performance and power.
> >
> > Xuewen Yan (2):
> >   sched/util_est: Simply the condition for util_est_dequeue/enqueue
> >   sched/uclamp: Align uclamp and util_est and call before freq update
> >
> >  kernel/sched/core.c | 17 ++++++++++-------
> >  kernel/sched/fair.c |  4 ++--
> >  2 files changed, 12 insertions(+), 9 deletions(-)
> >
> > ---
> > v3:
> > - split previous patch in 2 patches.
> >
> > v2:
> > - simply the util-est's en/dequeue check;
> > ---
>
> LGTM.
>
> Reviewed-by: Dietmar Eggemann <dietmar.eggemann@....com>
> Tested-by: Dietmar Eggemann <dietmar.eggemann@....com>
>
> I assume you can add Hongyan's test tag from:
> https://lkml.kernel.org/r/be0cace9-d173-4de3-959e-861876ad77fc@arm.com
> as well.
>