diff options
Diffstat (limited to 'Documentation/cgroups/cpuacct.txt')
| -rw-r--r-- | Documentation/cgroups/cpuacct.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/cgroups/cpuacct.txt b/Documentation/cgroups/cpuacct.txt index 9ad85df4b98..2601cdd217c 100644 --- a/Documentation/cgroups/cpuacct.txt +++ b/Documentation/cgroups/cpuacct.txt @@ -39,6 +39,10 @@ system: Time spent by tasks of the cgroup in kernel mode. user and system are in USER_HZ unit. +cpuacct.cpufreq file gives CPU time (in nanoseconds) spent at each CPU +frequency. Platform hooks must be implemented inorder to properly track +time at each CPU frequency. + cpuacct controller uses percpu_counter interface to collect user and system times. This has two side effects: |