[RFC PATCH 2/2] tools/perf: Make group_fd static and move its place in __perf_evsel__open()

[Deng-Cheng Zhu]

__perf_evsel__open() is called per event, it does not work for all the
grouped events at one time. So, currently group_fd will alway be -1 for
the events in a group. This patch fixes it.

Signed-off-by: Deng-Cheng Zhu <dczhu@xxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxxxx>
---
 tools/perf/util/evsel.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index e389815..7bd0d9d 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -219,9 +219,8 @@ static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
 	}
 
 	for (cpu = 0; cpu < cpus->nr; cpu++) {
-		int group_fd = -1;
-
 		for (thread = 0; thread < threads->nr; thread++) {
+			static int group_fd = -1;
 
 			if (!evsel->cgrp)
 				pid = threads->map[thread];
-- 
1.7.1

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