linux-kernel - [PATCH 5/5] perf tools: Allow PERF_FORMAT

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Date:	Fri, 22 Aug 2014 15:05:18 +0200
From:	Jiri Olsa <jolsa@...nel.org>
To:	linux-kernel@...r.kernel.org
Cc:	Jiri Olsa <jolsa@...nel.org>, Andi Kleen <andi@...stfloor.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	"Jen-Cheng(Tommy) Huang" <tommy24@...ech.edu>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 5/5] perf tools: Allow PERF_FORMAT_GROUP for inherited events

Swithing on leader sampling on inherited events.

Following command will now get data from all children processes:
  $ perf record -e '{cycles,cache-misses}:S' <workload>

Use following command to display the data:
  $ perf report --group

Reported-by: Jen-Cheng(Tommy) Huang <tommy24@...ech.edu>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jen-Cheng(Tommy) Huang <tommy24@...ech.edu>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Stephane Eranian <eranian@...gle.com>
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/util/evsel.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 507d458ded2c..29e32b59d762 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -584,10 +584,8 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
 		 * Apply group format only if we belong to group
 		 * with more than one members.
 		 */
-		if (leader->nr_members > 1) {
+		if (leader->nr_members > 1)
 			attr->read_format |= PERF_FORMAT_GROUP;
-			attr->inherit = 0;
-		}
 	}
 
 	/*
-- 
1.8.3.1

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