admin-guide/cgroup-v1/cpuacct.rst

2 CPU Accounting Controller
5 The CPU accounting controller is used to group tasks using cgroups and
8 The CPU accounting controller supports multi-hierarchy groups. An accounting
14   # mount -t cgroup -ocpuacct none /sys/fs/cgroup
18 the system. /sys/fs/cgroup/tasks lists the tasks in this cgroup.
21 in the system.
35 CPU time obtained by the cgroup into user and system times. Currently
39 system: Time spent by tasks of the cgroup in kernel mode.
41 user and system are in USER_HZ unit.
43 cpuacct controller uses percpu_counter interface to collect user and
44 system times. This has two side effects:
46 - It is theoretically possible to see wrong values for user and system times.
49 - It is possible to see slightly outdated values for user and system times