linux-kernel - [PATCH] perf record: Enable PERF_SAMPLE

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Message-ID: <20091021061925.GW4808@kryten>
Date:	Wed, 21 Oct 2009 17:19:25 +1100
From:	Anton Blanchard <anton@...ba.org>
To:	mingo@...e.hu, paulus@...ba.org, a.p.zijlstra@...llo.nl
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] perf record: Enable PERF_SAMPLE_ID when sampling multiple
	events


If we are sampling multiple events we need the id in each sample so we can
differentiate between them in a perf data file.

Signed-off-by: Anton Blanchard <anton@...ba.org>
---

Index: linux.trees.git/tools/perf/builtin-record.c
===================================================================
--- linux.trees.git.orig/tools/perf/builtin-record.c	2009-10-21 14:58:33.000000000 +1100
+++ linux.trees.git/tools/perf/builtin-record.c	2009-10-21 17:12:33.000000000 +1100
@@ -413,6 +413,9 @@ static void create_counter(int counter, 
 		attr->sample_type	|= PERF_SAMPLE_CPU;
 	}
 
+	if (nr_counters > 1)
+		attr->sample_type	|= PERF_SAMPLE_ID;
+
 	attr->mmap		= track;
 	attr->comm		= track;
 	attr->inherit		= (cpu < 0) && inherit;
--
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