Android cgroup 节点

最新推荐文章于 2025-03-14 13:49:17 发布

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本文详细介绍了CGroup在Linux系统中的配置情况及其文件系统的具体实现方式。通过查看不同目录下的文件，如/dev/cpuctl/和/acct/等，展示了CGroup如何管理和控制进程资源使用的方法。

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root@l:/ # cat proc/cgroups

subsys_name hierarchy num_cgroups enabled

cpu 2 2 1
cpuacct 1 131 1
freezer 0 1 1
debug 0 1 1

root@l:/sys/fs/cgroup # mount |grep cgroup
none /acct cgroup rw,relatime,cpuacct 0 0
none /sys/fs/cgroup tmpfs rw,seclabel,relatime,size=1853260k,nr_inodes=463315,mode=750,gid=1000 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0

root@l:/sys/fs/cgroup # ls -la /dev/cpuctl/
drwxr-xr-x root root 1970-01-19 06:05 bg_non_interactive
-rw-r–r– root root 0 2017-05-22 17:19 cgroup.clone_children
-rw-r–r– root root 0 2017-05-22 17:19 cgroup.procs
-r–r–r– root root 0 2017-05-22 17:19 cgroup.sane_behavior
-rw-r–r– root root 0 2017-05-22 09:22 cpu.notify_on_migrate
-rw-r–r– root root 0 1970-01-19 06:05 cpu.rt_period_us
-rw-r–r– root root 0 1970-01-19 06:05 cpu.rt_runtime_us
-rw-r–r– root root 0 1970-01-19 06:05 cpu.shares
-rw-r–r– root root 0 2017-05-22 17:19 cpu.upmigrate_discourage
-rw-r–r– root root 0 2017-05-22 17:19 notify_on_release
-rw-r–r– root root 0 2017-05-22 17:19 release_agent
-rw-rw-rw- system system 0 1970-01-19 06:05 tasks

root@l:/sys/fs/cgroup # ls -la /dev/cpuset/
drwxr-xr-x system system 1970-01-19 06:05 background
drwxr-xr-x system system 1970-01-19 06:05 foreground
drwxr-xr-x root root 1970-01-19 06:05 system-background

root@l:/sys/fs/cgroup # ls -la /acct/
-rw-r–r– root root 0 2017-05-22 17:19 cgroup.clone_children
-rw-r–r– root root 0 2017-05-22 17:19 cgroup.procs
-r–r–r– root root 0 2017-05-22 17:19 cgroup.sane_behavior
-r–r–r– root root 0 2017-05-22 17:19 cpuacct.stat
-rw-r–r– root root 0 2017-05-22 17:19 cpuacct.usage
-r–r–r– root root 0 2017-05-22 17:19 cpuacct.usage_percpu
-rw-r–r– root root 0 2017-05-22 17:19 notify_on_release
-rw-r–r– root root 0 2017-05-22 17:19 release_agent
-rw-r–r– root root 0 2017-05-22 17:19 tasks
drwxr-xr-x root root 2017-05-22 17:19 uid
drwx—— system system 2017-05-22 16:31 uid_1000
drwx—— system system 2017-05-22 10:31 uid_10001
drwx—— system system 2017-05-22 11:06 uid_10003

root@l:/sys/fs/cgroup # ls -la /acct/uid_10128
-rw-r–r– root root 0 2017-05-22 17:19 cgroup.clone_children
-rw-r–r– root root 0 2017-05-22 17:19 cgroup.procs
-r–r–r– root root 0 2017-05-22 17:19 cpuacct.stat
-rw-r–r– root root 0 2017-05-22 17:19 cpuacct.usage
-r–r–r– root root 0 2017-05-22 17:19 cpuacct.usage_percpu
-rw-r–r– root root 0 2017-05-22 17:19 notify_on_release
drwx—— system system 2017-05-22 14:29 pid_13421
drwx—— system system 2017-05-22 09:23 pid_4932
-rw-r–r– root root 0 2017-05-22 17:19 tasks