Re: Showing /sys/fs/cgroup/memory/memory.stat very slow on some machines

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To: "Singh, Balbir" <bsingharora@xxxxxxxxx>
Subject: Re: Showing /sys/fs/cgroup/memory/memory.stat very slow on some machines
From: Bruce Merry <bmerry@xxxxxxxxx>
Date: Thu, 26 Jul 2018 08:41:35 +0200
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Linux MM <linux-mm@xxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
In-reply-to: <dda7b095-db84-7e69-a03e-d8ce64fc9b8e@gmail.com>
References: <CAOm-9arwY3VLUx5189JAR9J7B=Miad9nQjjet_VNdT3i+J+5FA@mail.gmail.com> <20180717212307.d6803a3b0bbfeb32479c1e26@linux-foundation.org> <20180718104230.GC1431@dhcp22.suse.cz> <CAOm-9aqeKZ7+Jvhc5DxEEzbk4T0iQx8gZ=O1vy6YXnbOkncFsg@mail.gmail.com> <CALvZod7_vPwqyLBxiecZtREEeY4hioCGnZWVhQx9wVdM8CFcog@mail.gmail.com> <CAOm-9aprLokqi6awMvi0NbkriZBpmvnBA81QhOoHnK7ZEA96fw@mail.gmail.com> <CALvZod4ag02N6QPwRQCYv663hj05Z6vtrK8=XEE6uWHQCL4yRw@mail.gmail.com> <CAOm-9arxtTwNxXzmb8nN+N_UtjiuH0XkpkVPFHpi3EOYXvZYVA@mail.gmail.com> <dda7b095-db84-7e69-a03e-d8ce64fc9b8e@gmail.com>

On 26 July 2018 at 02:55, Singh, Balbir <bsingharora@xxxxxxxxx> wrote:
> Do you by any chance have use_hierarch=1? memcg_stat_show should just rely on counters inside the memory cgroup and the the LRU sizes for each node.

Yes, /sys/fs/cgroup/memory/memory.use_hierarchy is 1. I assume systemd
is doing that.

Bruce
-- 
Bruce Merry
Senior Science Processing Developer
SKA South Africa

Follow-Ups:
- Re: Showing /sys/fs/cgroup/memory/memory.stat very slow on some machines
  - From: Michal Hocko

References:
- Re: Showing /sys/fs/cgroup/memory/memory.stat very slow on some machines
  - From: Andrew Morton
- Re: Showing /sys/fs/cgroup/memory/memory.stat very slow on some machines
  - From: Michal Hocko
- Re: Showing /sys/fs/cgroup/memory/memory.stat very slow on some machines
  - From: Bruce Merry
- Re: Showing /sys/fs/cgroup/memory/memory.stat very slow on some machines
  - From: Shakeel Butt
- Re: Showing /sys/fs/cgroup/memory/memory.stat very slow on some machines
  - From: Bruce Merry
- Re: Showing /sys/fs/cgroup/memory/memory.stat very slow on some machines
  - From: Shakeel Butt
- Re: Showing /sys/fs/cgroup/memory/memory.stat very slow on some machines
  - From: Bruce Merry
- Re: Showing /sys/fs/cgroup/memory/memory.stat very slow on some machines
  - From: Singh, Balbir

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