From: Juri Lelli <juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Qais Yousef <qyousef-wp2msK0BRk8tq7phqP6ubQ@public.gmane.org>,
Waiman Long <longman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Zefan Li <lizefan.x-EC8Uxl6Npydl57MIdRCFDg@public.gmane.org>,
Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>,
Hao Luo <haoluo-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Dietmar Eggemann <dietmar.eggemann-5wv7dgnIgG8@public.gmane.org>,
Steven Rostedt <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
luca.abeni-5rdYK369eBLQB0XuIGIEkQ@public.gmane.org,
claudio-YOzL5CV4y4YG1A2ADO40+w@public.gmane.org,
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mathieu.poirier-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Vincent Guittot
<vincent.guittot-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Wei Wang <wvw-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Rick Yiu <rickyiu-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Quentin Perret <qperret-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Heiko Carstens <hca-tEXmvtCZX7AybS5Ee8rs3A@public.gmane.org>,
Vasily Gorbik <gor-tEXmvtCZX7AybS5Ee8rs3A@public.gmane.org>,
Alexander Gordeev
<agordeev-tEXmvtCZX7AybS5Ee8rs3A@public.gmane.org>
Subject: Re: [PATCH v2 2/6] sched/cpuset: Bring back cpuset_mutex
Date: Thu, 4 May 2023 10:13:00 +0200 [thread overview]
Message-ID: <ZFNpDELMDUoK99HM@localhost.localdomain> (raw)
In-Reply-To: <20230504062105.GD1734100-Nxj+rRp3nVydTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
On 04/05/23 08:21, Peter Zijlstra wrote:
> On Wed, May 03, 2023 at 09:22:24AM +0200, Juri Lelli wrote:
> > Turns out percpu_cpuset_rwsem - commit 1243dc518c9d ("cgroup/cpuset:
> > Convert cpuset_mutex to percpu_rwsem") - wasn't such a brilliant idea,
> > as it has been reported to cause slowdowns in workloads that need to
> > change cpuset configuration frequently and it is also not implementing
> > priority inheritance (which causes troubles with realtime workloads).
>
> What were they doing ? Dynamically adjusting the DL parameters?
>
Yes, calling sched_setattr to adjust params and/or add/remove DL
reservations.
next prev parent reply other threads:[~2023-05-04 8:13 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-03 7:22 [PATCH v2 0/6] sched/deadline: cpuset: Rework DEADLINE bandwidth restoration Juri Lelli
2023-05-03 7:22 ` [PATCH v2 6/6] cgroup/cpuset: Free DL BW in case can_attach() fails Juri Lelli
2023-05-03 18:02 ` Waiman Long
[not found] ` <20230503072228.115707-1-juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-05-03 7:22 ` [PATCH v2 1/6] cgroup/cpuset: Rename functions dealing with DEADLINE accounting Juri Lelli
[not found] ` <20230503072228.115707-2-juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-05-03 17:54 ` Waiman Long
2023-05-03 7:22 ` [PATCH v2 2/6] sched/cpuset: Bring back cpuset_mutex Juri Lelli
2023-05-04 6:18 ` Peter Zijlstra
[not found] ` <20230504061842.GC1734100-Nxj+rRp3nVydTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2023-05-04 8:13 ` Juri Lelli
[not found] ` <20230503072228.115707-3-juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-05-03 17:55 ` Waiman Long
2023-05-04 6:21 ` Peter Zijlstra
[not found] ` <20230504062105.GD1734100-Nxj+rRp3nVydTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2023-05-04 8:13 ` Juri Lelli [this message]
2023-05-03 7:22 ` [PATCH v2 3/6] sched/cpuset: Keep track of SCHED_DEADLINE task in cpusets Juri Lelli
[not found] ` <20230503072228.115707-4-juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-05-03 17:56 ` Waiman Long
2023-05-03 7:22 ` [PATCH v2 4/6] cgroup/cpuset: Iterate only if DEADLINE tasks are present Juri Lelli
2023-05-03 17:56 ` Waiman Long
2023-05-03 7:22 ` [PATCH v2 5/6] sched/deadline: Create DL BW alloc, free & check overflow interface Juri Lelli
[not found] ` <20230503072228.115707-6-juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-05-03 17:45 ` Waiman Long
2023-05-04 6:23 ` Peter Zijlstra
[not found] ` <20230504062359.GE1734100-Nxj+rRp3nVydTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2023-05-04 8:15 ` Juri Lelli
2023-05-04 17:21 ` Dietmar Eggemann
2023-05-04 6:25 ` [PATCH v2 0/6] sched/deadline: cpuset: Rework DEADLINE bandwidth restoration Peter Zijlstra
[not found] ` <20230504062525.GF1734100-Nxj+rRp3nVydTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2023-05-04 8:17 ` Juri Lelli
[not found] ` <ZFNqJf+BQ0GMdr+y-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2023-05-05 19:31 ` Tejun Heo
2023-05-08 8:02 ` Juri Lelli
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