linux-kernel - [tip:perf/core] perf record: Add support for mem access profiling

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Message-ID: <tip-ccf49bfc6bb1025788637417780e9f1eeae9fc37@git.kernel.org>
Date:	Tue, 2 Apr 2013 02:51:54 -0700
From:	tip-bot for Stephane Eranian <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, eranian@...gle.com,
	hpa@...or.com, mingo@...nel.org, peterz@...radead.org,
	namhyung.kim@....com, jolsa@...hat.com, ak@...ux.intel.com,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perf/core] perf record: Add support for mem access profiling

Commit-ID:  ccf49bfc6bb1025788637417780e9f1eeae9fc37
Gitweb:     http://git.kernel.org/tip/ccf49bfc6bb1025788637417780e9f1eeae9fc37
Author:     Stephane Eranian <eranian@...gle.com>
AuthorDate: Thu, 24 Jan 2013 16:10:37 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 1 Apr 2013 12:20:28 -0300

perf record: Add support for mem access profiling

We use the -W option to obtain the cost of the memory accesses.

Data address sampling is obtained via the -d option.

Signed-off-by: Stephane Eranian <eranian@...gle.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung.kim@....com>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/1359040242-8269-14-git-send-email-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/evsel.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 5c4ca51..07b1a3a 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -554,6 +554,9 @@ void perf_evsel__config(struct perf_evsel *evsel,
 		perf_evsel__set_sample_bit(evsel, CPU);
 	}
 
+	if (opts->sample_address)
+		attr->sample_type	|= PERF_SAMPLE_DATA_SRC;
+
 	if (opts->no_delay) {
 		attr->watermark = 0;
 		attr->wakeup_events = 1;
--
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