From: zhong jiang <zhongjiang@huawei.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc: qiuxishi@huawei.com, guohanjun@huawei.com
Subject: is it a problem when cat /proc/pid/status
Date: Mon, 31 Aug 2015 15:33:42 +0800 [thread overview]
Message-ID: <55E40356.3050800@huawei.com> (raw)
I want to know whether the NUMA bound memory node with CONFIG_CGROUPS related or associted with NUMA binding.
I wrote an example test,the results are as follows.
> euler-linux:/home/zhongjiang # numactl --membind=1 ./new &
> [1] 6529
> euler-linux:/home/zhongjiang # ps -ef | grep new
> root 6529 4483 0 14:40 pts/1 00:00:00 ./new
> root 6556 4483 0 14:40 pts/1 00:00:00 grep new
> euler-linux:/home/zhongjiang # cat /proc/6529/status
> Name: new
> State: S (sleeping)
........
> Cpus_allowed: ffffff
> Cpus_allowed_list: 0-23
> Mems_allowed: 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,007fffff
> Mems_allowed_list: 0-22
> voluntary_ctxt_switches: 19
> nonvoluntary_ctxt_switches: 0
euler-linux:/home/zhongjiang # numactl --membind=3 ./new &
[1] 9113
euler-linux:/home/zhongjiang # ps -ef | grep mew
root 9140 8948 0 14:55 pts/1 00:00:00 grep mew
euler-linux:/home/zhongjiang # ps -ef | grep new
root 9113 8948 0 14:55 pts/1 00:00:00 ./new
root 9209 8948 0 14:55 pts/1 00:00:00 grep new
euler-linux:/home/zhongjiang # cat /proc/9113/status
Name: new
State: S (sleeping)
Tgid: 9113
Ngid: 0
Pid: 9113
PPid: 8948
......
Cpus_allowed: ffffff
Cpus_allowed_list: 0-23
Mems_allowed: 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,007fffff
Mems_allowed_list: 0-22
voluntary_ctxt_switches: 26
nonvoluntary_ctxt_switches: 0
Through the comparison of the above, I can find Whatever I use node for binding, the mems_allowed fields has been no change
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reply other threads:[~2015-08-31 7:50 UTC|newest]
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