linux-kernel - [tip:perf/urgent] perf report/top: Add a tip about source line numbers with overhead

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Message-ID: <tip-8649b6434ebc184e632a510c4121899481409c15@git.kernel.org>
Date:   Thu, 6 Oct 2016 15:43:33 -0700
From:   tip-bot for Kim SeonYoung <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, adamas0414@...il.com, mingo@...nel.org,
        linux-kernel@...r.kernel.org, hpa@...or.com, taeung@...slab.kr,
        namhyung@...nel.org, acme@...hat.com, jolsa@...nel.org,
        peterz@...radead.org
Subject: [tip:perf/urgent] perf report/top: Add a tip about source line
 numbers with overhead

Commit-ID:  8649b6434ebc184e632a510c4121899481409c15
Gitweb:     http://git.kernel.org/tip/8649b6434ebc184e632a510c4121899481409c15
Author:     Kim SeonYoung <adamas0414@...il.com>
AuthorDate: Thu, 29 Sep 2016 17:16:42 -0700
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 5 Oct 2016 19:47:55 -0300

perf report/top: Add a tip about source line numbers with overhead

There is a existing tip as below.

    If you have debuginfo enabled, try: perf report -s sym,srcline

However this tip only describe a condition to use --sort sym,scrline
options.  So there is lack of explanation in the tip. I think that it
would be better to add a tip that exactly explains the feature of --sort
srcline.

Signed-off-by: Seonyoung Kim <adamas0414@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Taeung Song <taeung@...slab.kr>
Link: http://lkml.kernel.org/r/1475194602-5596-1-git-send-email-adamas0414@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/Documentation/tips.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/Documentation/tips.txt b/tools/perf/Documentation/tips.txt
index 5950b5a..b031124 100644
--- a/tools/perf/Documentation/tips.txt
+++ b/tools/perf/Documentation/tips.txt
@@ -28,3 +28,4 @@ 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
 For hierarchical output, try: perf report --hierarchy
+Order by the overhead of source file name and line number: perf report -s srcline