perf tools: Do not disable members of group event

When event group is enabled for forked task (i.e. no target task/cpu
was specified) all events were disabled and marked ->enable_on_exec.
However they wouldn't be counted at all since only group leader will
be enabled on exec actually.

In contrast to perf stat, perf record doesn't have a real problem
as it enables all the event before proceeding. But it needs to be
fixed anyway IMHO.

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1331887340-32448-2-git-send-email-namhyung.kim@lge.com
Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 159263d17c2d..1986d8051bd1 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -51,13 +51,15 @@ struct perf_evlist *perf_evlist__new(struct cpu_map *cpus,
 void perf_evlist__config_attrs(struct perf_evlist *evlist,
                                struct perf_record_opts *opts)
 {
-        struct perf_evsel *evsel;
+        struct perf_evsel *evsel, *first;
 
         if (evlist->cpus->map[0] < 0)
                 opts->no_inherit = true;
 
+        first = list_entry(evlist->entries.next, struct perf_evsel, node);
+
         list_for_each_entry(evsel, &evlist->entries, node) {
-                perf_evsel__config(evsel, opts);
+                perf_evsel__config(evsel, opts, first);
 
                 if (evlist->nr_entries > 1)
                         evsel->attr.sample_type |= PERF_SAMPLE_ID;