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-rw-r--r--Documentation/cgroups/cpuacct.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/cgroups/cpuacct.txt b/Documentation/cgroups/cpuacct.txt
index 9ad85df..3419707 100644
--- a/Documentation/cgroups/cpuacct.txt
+++ b/Documentation/cgroups/cpuacct.txt
@@ -39,6 +39,13 @@ 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.power file gives CPU power consumed (in milliWatt seconds). Platform
+must provide and implement power callback functions.
+
cpuacct controller uses percpu_counter interface to collect user and
system times. This has two side effects: