linux-kernel - [PATCH v13 09/23] perf config: Document variables for 'report' section in man page

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Date:	Fri,  8 Jan 2016 20:39:39 +0900
From:	Taeung Song <treeze.taeung@...il.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Taeung Song <treeze.taeung@...il.com>
Subject: [PATCH v13 09/23] perf config: Document variables for 'report' section in man page

Explain 'report' section's variables.

'percent-limit', 'queue-size' and 'children'.

Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Jiri Olsa <jolsa@...nel.org>
Signed-off-by: Taeung Song <treeze.taeung@...il.com>
---
 tools/perf/Documentation/perf-config.txt | 34 ++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt
index 2f965e0..ef4d68f 100644
--- a/tools/perf/Documentation/perf-config.txt
+++ b/tools/perf/Documentation/perf-config.txt
@@ -372,6 +372,40 @@ call-graph.*::
 		This is a maximum number of lines of callchain printed for a single
 		histogram entry. Default is 0 which means no limitation.
 
+report.*::
+	report.percent-limit::
+		This one is mostly same as call-graph.threshold but works for
+		histogram entries. Entries have overhead lower than this percentage
+		will not be printed. Default is 0. If percent-limit is 10,
+		entries which have more than 10% of overhead will be printed only.
+
+	report.queue-size::
+		This option is to setup the maximum allocation size of internal
+		event queue for ordering events. Default is 0, meaning no limit.
+
+	report.children::
+		The children means that functions called from another function.
+		If this option is true, perf report cumulates callchains of children
+		and show (accumulated) total overhead as well as self overhead.
+		Please refer to the perf-report manual. The default is true.
+
+	report.group::
+		This option is to show event group information together.
+		If it is 'true', event group view can be enabled by default i.e.
+
+		# group: {ref-cycles,cycles}
+		# ========
+		#
+		# Samples: 7K of event 'anon group { ref-cycles, cycles }'
+		# Event count (approx.): 6876107743
+		#
+		#         Overhead  Command      Shared Object                      Symbol
+		# ................  .......  .................  ..........................
+		#
+		    99.84%  99.76%  noploop  noploop            [.] main
+		     0.07%   0.00%  noploop  ld-2.15.so         [.] strcmp
+		     0.03%   0.00%  noploop  [kernel.kallsyms]  [k] timerqueue_del
+
 SEE ALSO
 --------
 linkperf:perf[1]
-- 
2.5.0