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-rw-r--r--tools/perf/Documentation/itrace.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/itrace.txt b/tools/perf/Documentation/itrace.txt
index 2ff946677e3b..65453f4c7006 100644
--- a/tools/perf/Documentation/itrace.txt
+++ b/tools/perf/Documentation/itrace.txt
@@ -6,6 +6,7 @@
e synthesize error events
d create a debug log
g synthesize a call chain (use with i or x)
+ l synthesize last branch entries (use with i or x)
The default is all events i.e. the same as --itrace=ibxe
@@ -20,3 +21,6 @@
Also the call chain size (default 16, max. 1024) for instructions or
transactions events can be specified.
+
+ Also the number of last branch entries (default 64, max. 1024) for
+ instructions or transactions events can be specified.