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-rw-r--r--tools/perf/Documentation/perf-inject.txt5
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diff --git a/tools/perf/Documentation/perf-inject.txt b/tools/perf/Documentation/perf-inject.txt
index 673ef97..a00a342 100644
--- a/tools/perf/Documentation/perf-inject.txt
+++ b/tools/perf/Documentation/perf-inject.txt
@@ -35,6 +35,11 @@ OPTIONS
-o::
--output=::
Output file name. (default: stdout)
+-s::
+--sched-stat::
+ Merge sched_stat and sched_switch for getting events where and how long
+ tasks slept. sched_switch contains a callchain where a task slept and
+ sched_stat contains a timeslice how long a task slept.
SEE ALSO
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