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3.3. cpuacct
The CPU Accounting (
cpuacct) subsystem generates automatic reports on CPU resources used by the tasks in a cgroup, including tasks in child groups. Three reports are available:
- cpuacct.usage
- reports the total CPU time (in nanoseconds) consumed by all tasks in this cgroup (including tasks lower in the hierarchy).
Note
To reset the value incpuacct.usage, execute the following command:~]#
echo 0 > /cgroup/cpuacct/cpuacct.usageThe above command also resets values incpuacct.usage_percpu. - cpuacct.stat
- reports the user and system CPU time consumed by all tasks in this cgroup (including tasks lower in the hierarchy) in the following way:
user— CPU time consumed by tasks in user mode.system— CPU time consumed by tasks in system (kernel) mode.
CPU time is reported in the units defined by theUSER_HZvariable. - cpuacct.usage_percpu
- reports the CPU time (in nanoseconds) consumed on each CPU by all tasks in this cgroup (including tasks lower in the hierarchy).
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