It's not clear that perf trace must be run as a privileged user, so
include an example demonstrating its usage with sudo. While at it,
update the synopsis to include options.
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Namhyung Kim <namhy...@gmail.com>
Cc: Arnaldo Carvalho de Melo <a...@ghostprotocols.net>
Cc: David Ahern <dsah...@gmail.com>
Signed-off-by: Ramkumar Ramachandra <artag...@gmail.com>
---
tools/perf/Documentation/perf-trace.txt | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Documentation/perf-trace.txt
b/tools/perf/Documentation/perf-trace.txt
index daccd2c..4ad8950 100644
--- a/tools/perf/Documentation/perf-trace.txt
+++ b/tools/perf/Documentation/perf-trace.txt
@@ -8,7 +8,7 @@ perf-trace - strace inspired tool
SYNOPSIS
--------
[verse]
-'perf trace'
+'perf trace' [<options>]
DESCRIPTION
-----------
@@ -78,6 +78,26 @@ the thread executes on the designated CPUs. Default is to
monitor all CPUs.
--input
Process events from a given perf data file.
+EXAMPLES
+--------
+
+$ sudo perf trace -a -e open
+
+ 349.934 ( 0.012 ms): 832 open(filename: 0xc1a4f0, flags: RDONLY
) = 14
+ 349.985 ( 0.004 ms): 832 open(filename: 0xb390e0, flags: RDONLY
) = 14
+ 350.012 ( 0.004 ms): 832 open(filename: 0xa9c930, flags: RDONLY
) = 14
+ 350.037 ( 0.003 ms): 832 open(filename: 0xc1a4f0, flags: RDONLY
) = 14
+ 350.060 ( 0.003 ms): 832 open(filename: 0xb390e0, flags: RDONLY
) = 14
+ 349.943 ( 0.010 ms): 9379 open(filename: 0x17d3080, flags: RDONLY
) = 19
+ 350.213 ( 0.003 ms): 832 open(filename: 0xc93d10, flags: RDONLY
) = 14
+ 350.307 ( 0.002 ms): 832 open(filename: 0xc64820, flags: RDONLY
) = 14
+ 350.399 ( 0.002 ms): 832 open(filename: 0xea20f0, flags: RDONLY
) = 14
+ 350.481 ( 0.002 ms): 832 open(filename: 0xbfb940, flags: RDONLY
) = 14
+ 350.567 ( 0.002 ms): 832 open(filename: 0xb3edb0, flags: RDONLY
) = 14
+ 850.345 ( 0.010 ms): 832 open(filename: 0xb72ba0, flags: RDONLY
) = 14
+ 850.390 ( 0.003 ms): 832 open(filename: 0xfd8860, flags: RDONLY
) = 14
+ 850.414 ( 0.003 ms): 832 open(filename: 0xee4740, flags: RDONLY
) = 14
+
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script[1]
--
1.8.4.477.g5d89aa9
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