From 6555c2f6db2196ef1b6d7149e7d342d0ba2ec57e Mon Sep 17 00:00:00 2001
From: Changbin Du <changbin.du@gmail.com>
Date: Sat, 8 Aug 2020 10:31:38 +0800
Subject: perf ftrace: Add option -D/--delay to delay tracing

This adds an option '-D/--delay' to allow us to start tracing some times
later after workload is launched.

Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: http://lore.kernel.org/lkml/20200808023141.14227-16-changbin.du@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Documentation/perf-ftrace.txt | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'tools/perf/Documentation')

diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt
index 08216634d2bc..29c684b3b3fd 100644
--- a/tools/perf/Documentation/perf-ftrace.txt
+++ b/tools/perf/Documentation/perf-ftrace.txt
@@ -39,6 +39,10 @@ OPTIONS
 --pid=::
 	Trace on existing process id (comma separated list).
 
+-D::
+--delay::
+	Time (ms) to wait before starting tracing after program start.
+
 -a::
 --all-cpus::
 	Force system-wide collection.  Scripts run without a <command>
-- 
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