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Message-ID: <rs46fzspb2w46zcbgdjysqd2rcfqs4yk55xyf5syvnf75rjhfe@ku6i5chn5qrq>
Date: Mon, 19 Jun 2023 19:53:11 +0200
From: Michal Koutný <mkoutny@...e.com>
To: Josh Don <joshdon@...gle.com>
Cc: Tejun Heo <tj@...nel.org>, Zefan Li <lizefan.x@...edance.com>,
Johannes Weiner <hannes@...xchg.org>,
Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Juri Lelli <juri.lelli@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Steven Rostedt <rostedt@...dmis.org>,
Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
Daniel Bristot de Oliveira <bristot@...hat.com>,
Valentin Schneider <vschneid@...hat.com>,
cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
Xiangling Kong <xiangling@...gle.com>
Subject: Re: [PATCH v2 2/2] sched: add throttled time stat for throttled
children
On Mon, Jun 12, 2023 at 04:27:48PM -0700, Josh Don <joshdon@...gle.com> wrote:
> We currently export the total throttled time for cgroups that are given
> a bandwidth limit.
I assume you refer to cpu.stat:throttled_usec (from struct
cfs_bandwidth) -- notice that the value is not properly hierarchical
despite v2 filename.
> This patch extends this accounting to also account the total time that
> each children cgroup has been throttled.
IIUC, this is visible on inner-nodes cpu cgroups (i.e. with no tasks)?
IOW, wouldn't you get the intended information if hierarchical summing
was added/fixed for cpu.stat:throttled_usec?
Thanks,
Michal
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