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-rw-r--r--tools/perf/Documentation/perf-trace.txt10
1 files changed, 8 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt
index 7b0497f95a75..fae38d9a44a4 100644
--- a/tools/perf/Documentation/perf-trace.txt
+++ b/tools/perf/Documentation/perf-trace.txt
@@ -93,9 +93,15 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs.
--comm::
Show process COMM right beside its ID, on by default, disable with --no-comm.
+-s::
--summary::
- Show a summary of syscalls by thread with min, max, and average times (in
- msec) and relative stddev.
+ Show only a summary of syscalls by thread with min, max, and average times
+ (in msec) and relative stddev.
+
+-S::
+--with-summary::
+ Show all syscalls followed by a summary by thread with min, max, and
+ average times (in msec) and relative stddev.
--tool_stats::
Show tool stats such as number of times fd->pathname was discovered thru