linux-kernel - [PATCH 3.16 070/217] perf stat: Document --detailed option

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Message-ID: <lsq.1461711741.565743922@decadent.org.uk>
Date:	Wed, 27 Apr 2016 01:02:21 +0200
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Davidlohr Bueso" <dbueso@...e.com>,
	"Ingo Molnar" <mingo@...nel.org>,
	"Steven Rostedt" <rostedt@...dmis.org>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Peter Zijlstra" <peterz@...radead.org>,
	"Alexander Shishkin" <alexander.shishkin@...ux.intel.com>,
	"David Ahern" <dsahern@...il.com>, "Borislav Petkov" <bp@...e.de>,
	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>,
	"Namhyung Kim" <namhyung@...nel.org>,
	"Mel Gorman" <mgorman@...e.com>,
	"Arnaldo Carvalho de Melo" <acme@...hat.com>,
	"Jiri Olsa" <jolsa@...hat.com>
Subject: [PATCH 3.16 070/217] perf stat: Document --detailed option

3.16.35-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Borislav Petkov <bp@...e.de>

commit f594bae08183fb6b57db55387794ece3e1edf6f6 upstream.

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>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 tools/perf/Documentation/perf-stat.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -50,6 +50,14 @@ OPTIONS
 --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.