linux-kernel - [PATCH 1/2] perf_counter: tools: Make :u and :k exclude hypervisor

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Date:	Mon, 29 Jun 2009 21:08:26 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC:	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] perf_counter: tools: Make :u and :k exclude hypervisor

At present, appending ":u" to an event sets the exclude_kernel bit,
and ":k" sets the exclude_user bit.  There is no way to set the
exclude_hv bit, which means that on systems with a hypervisor (e.g.
IBM pSeries systems), we get counts from hypervisor mode for an event
such as 0:1:u.

This fixes the problem by setting all three exclude bits when we see
the second ':' and the clearing the exclude bits corresponding to the
modes we want to count.  This also adds a ":h" modifier to allow the
user to ask for counts in hypervisor mode.

Signed-off-by: Paul Mackerras <paulus@...ba.org>
---
 tools/perf/util/parse-events.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 4d042f1..f2ffe2c 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -277,10 +277,15 @@ static int parse_event_symbols(const char *str, struct perf_counter_attr *attr)
 		sep = strchr(pstr, ':');
 		if (sep) {
 			pstr = sep + 1;
+			attr->exclude_user = 1;
+			attr->exclude_kernel = 1;
+			attr->exclude_hv = 1;
 			if (strchr(pstr, 'k'))
-				attr->exclude_user = 1;
+				attr->exclude_kernel = 0;
 			if (strchr(pstr, 'u'))
-				attr->exclude_kernel = 1;
+				attr->exclude_user = 0;
+			if (strchr(pstr, 'h'))
+				attr->exclude_hv = 0;
 		}
 		attr->type = type;
 		attr->config = id;
-- 
1.6.0.4

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