[tip:perf/urgent] perf tools: Add more usage tips

From: tip-bot for Namhyung Kim
Date: Wed Jan 13 2016 - 04:45:19 EST


Commit-ID: 09f1985404aa99b9d1ad435fcb0dabd20d4ed498
Gitweb: http://git.kernel.org/tip/09f1985404aa99b9d1ad435fcb0dabd20d4ed498
Author: Namhyung Kim <namhyung@xxxxxxxxxx>
AuthorDate: Mon, 11 Jan 2016 19:35:10 +0900
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 12 Jan 2016 12:42:07 -0300

perf tools: Add more usage tips

Thanks to Andi Kleen for providing useful tips.

Suggested-by: Andi Kleen <andi@xxxxxxxxxxxxxx>
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: Brendan Gregg <brendan.d.gregg@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1452508510-28316-1-git-send-email-namhyung@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/Documentation/tips.txt | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/tools/perf/Documentation/tips.txt b/tools/perf/Documentation/tips.txt
index a1c10e3..e0ce957 100644
--- a/tools/perf/Documentation/tips.txt
+++ b/tools/perf/Documentation/tips.txt
@@ -12,3 +12,18 @@ List events using substring match: perf list <keyword>
To see list of saved events and attributes: perf evlist -v
Use --symfs <dir> if your symbol files are in non-standard locations
To see callchains in a more compact form: perf report -g folded
+Show individual samples with: perf script
+Limit to show entries above 5% only: perf report --percent-limit 5
+Profiling branch (mis)predictions with: perf record -b / perf report
+Treat branches as callchains: perf report --branch-history
+To count events in every 1000 msec: perf stat -I 1000
+Print event counts in CSV format with: perf stat -x,
+If you have debuginfo enabled, try: perf report -s sym,srcline
+For memory address profiling, try: perf mem record / perf mem report
+For tracepoint events, try: perf report -s trace_fields
+To record callchains for each sample: perf record -g
+To record every process run by an user: perf record -u <user>
+Skip collecing build-id when recording: perf record -B
+To change sampling frequency to 100 Hz: perf record -F 100
+See assembly instructions with percentage: perf annotate <symbol>
+If you prefer Intel style assembly, try: perf annotate -M intel