linux-kernel - Re: [PATCH 00/24] Complete EEVDF

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Message-ID: <xhsmh8qwwcx1j.mognet@vschneid-thinkpadt14sgen2i.remote.csb>
Date: Fri, 16 Aug 2024 17:22:32 +0200
From: Valentin Schneider <vschneid@...hat.com>
To: Peter Zijlstra <peterz@...radead.org>, mingo@...hat.com,
 peterz@...radead.org, juri.lelli@...hat.com, vincent.guittot@...aro.org,
 dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
 mgorman@...e.de, linux-kernel@...r.kernel.org
Cc: kprateek.nayak@....com, wuyun.abel@...edance.com,
 youssefesmat@...omium.org, tglx@...utronix.de, efault@....de
Subject: Re: [PATCH 00/24] Complete EEVDF

On 27/07/24 12:27, Peter Zijlstra wrote:
> Hi all,
>
> So after much delay this is hopefully the final version of the EEVDF patches.
> They've been sitting in my git tree for ever it seems, and people have been
> testing it and sending fixes.
>
> I've spend the last two days testing and fixing cfs-bandwidth, and as far
> as I know that was the very last issue holding it back.
>
> These patches apply on top of queue.git sched/dl-server, which I plan on merging
> in tip/sched/core once -rc1 drops.
>
> I'm hoping to then merge all this (+- the DVFS clock patch) right before -rc2.
>
>
> Aside from a ton of bug fixes -- thanks all! -- new in this version is:
>
>  - split up the huge delay-dequeue patch
>  - tested/fixed cfs-bandwidth
>  - PLACE_REL_DEADLINE -- preserve the relative deadline when migrating
>  - SCHED_BATCH is equivalent to RESPECT_SLICE
>  - propagate min_slice up cgroups
>  - CLOCK_THREAD_DVFS_ID

So what I've been testing at your queue/sched/core, HEAD at:
  4cc290c20a98 ("sched/eevdf: Dequeue in switched_from_fair()")
survives my (simplistic) CFS bandwidth testing, so FWIW:
  Tested-by: Valentin Schneider <vschneid@...hat.com>

And for patches 01-20:
  Reviewed-by: Valentin Schneider <vschneid@...hat.com>

with one caveat that I agree with Vincent on maybe doing something about
the load PELT signal of delayed dequeued entities.