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-rw-r--r--tools/perf/Documentation/perf-ftrace.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt
index 29c684b3b3fd..78358af9a1c4 100644
--- a/tools/perf/Documentation/perf-ftrace.txt
+++ b/tools/perf/Documentation/perf-ftrace.txt
@@ -39,6 +39,9 @@ OPTIONS
--pid=::
Trace on existing process id (comma separated list).
+--tid=::
+ Trace on existing thread id (comma separated list).
+
-D::
--delay::
Time (ms) to wait before starting tracing after program start.