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Message-ID: <2cb984f3-fb8b-df26-31a2-8a091213d87e@bytedance.com> Date: Tue, 9 Feb 2021 09:49:34 +0800 From: Chengming Zhou <zhouchengming@...edance.com> To: Johannes Weiner <hannes@...xchg.org> Cc: mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com, vincent.guittot@...aro.org, rostedt@...dmis.org, dietmar.eggemann@....com, linux-kernel@...r.kernel.org, songmuchun@...edance.com Subject: Re: [External] Re: [PATCH] psi: Add PSI_CPU_FULL state 在 2021/2/9 上午2:18, Johannes Weiner 写道: > On Sun, Feb 07, 2021 at 03:24:02PM +0800, Chengming Zhou wrote: >> The FULL state doesn't exist for the CPU resource at the system level, >> but exist at the cgroup level, means all non-idle tasks in a cgroup are >> delayed on the CPU resource which used by others outside of the cgroup. >> >> Co-developed-by: Muchun Song <songmuchun@...edance.com> >> Signed-off-by: Muchun Song <songmuchun@...edance.com> >> Signed-off-by: Chengming Zhou <zhouchengming@...edance.com> > Acked-by: Johannes Weiner <hannes@...xchg.org> > > That metric's come up in our production environment recently as well, > it makes a lot of sense. > > In addition to outside competition, this also applies to downtimes > enforced by cpu.max - another cgroup usecase that is worth mentioning > in the changelog & code comment. Thank you, I will add this and send patch-v2. > Thanks
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