linux-kernel - [PATCH 09/13] perf report/top: Add a tip about source line numbers with overhead

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Date:   Thu,  6 Oct 2016 13:11:52 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Linux Weekly News <lwn@....net>,
        Kim SeonYoung <adamas0414@...il.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Taeung Song <taeung@...slab.kr>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 09/13] perf report/top: Add a tip about source line numbers with overhead

From: Kim SeonYoung <adamas0414@...il.com>

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 5950b5a24efd..b0311248407f 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
-- 
2.7.4