linux-kernel - [tip:perf/core] perf stat: Document --detailed option

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Message-ID: <tip-f594bae08183fb6b57db55387794ece3e1edf6f6@git.kernel.org>
Date:	Tue, 8 Mar 2016 02:32:26 -0800
From:	tip-bot for Borislav Petkov <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hpa@...or.com, jolsa@...hat.com, a.p.zijlstra@...llo.nl,
	mgorman@...e.com, bp@...e.de, acme@...hat.com, namhyung@...nel.org,
	rostedt@...dmis.org, peterz@...radead.org, dbueso@...e.com,
	linux-kernel@...r.kernel.org, alexander.shishkin@...ux.intel.com,
	tglx@...utronix.de, mingo@...nel.org, dsahern@...il.com
Subject: [tip:perf/core] perf stat: Document --detailed option

Commit-ID:  f594bae08183fb6b57db55387794ece3e1edf6f6
Gitweb:     http://git.kernel.org/tip/f594bae08183fb6b57db55387794ece3e1edf6f6
Author:     Borislav Petkov <bp@...e.de>
AuthorDate: Mon, 7 Mar 2016 16:44:44 -0300
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 8 Mar 2016 10:11:18 +0100

perf stat: Document --detailed option

I'm surprised this remained undocumented since at least 2011. And it is
actually a very useful switch, as Steve and I came to realize recently.

Add the text from

  2cba3ffb9a9d ("perf stat: Add -d -d and -d -d -d options to show more CPU events")

which added the incrementing aspect to -d.

Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Davidlohr Bueso <dbueso@...e.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Mel Gorman <mgorman@...e.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Fixes: 2cba3ffb9a9d ("perf stat: Add -d -d and -d -d -d options to show more CPU events")
Link: http://lkml.kernel.org/r/1457347294-32546-1-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 tools/perf/Documentation/perf-stat.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
index 52ef7a9..14d9e8f 100644
--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -69,6 +69,14 @@ report::
 --scale::
 	scale/normalize counter values
 
+-d::
+--detailed::
+	print more detailed statistics, can be specified up to 3 times
+
+	   -d:          detailed events, L1 and LLC data cache
+        -d -d:     more detailed events, dTLB and iTLB events
+     -d -d -d:     very detailed events, adding prefetch events
+
 -r::
 --repeat=<n>::
 	repeat command and print average + stddev (max: 100). 0 means forever.