Messages in this thread | | | Date | Mon, 8 Feb 2021 13:18:08 -0500 | From | Johannes Weiner <> | Subject | Re: [PATCH] psi: Add PSI_CPU_FULL state |
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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@bytedance.com> > Signed-off-by: Muchun Song <songmuchun@bytedance.com> > Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.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.
Thanks
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