[PATCH 1/5] libperf: Populate system-wide evsel maps

[Namhyung Kim]

Setting proper cpu and thread maps for system wide evsels regardless of
user requested cpu in __perf_evlist__propagate_maps().  Those evsels
need to be active on all cpus always.  Do it in the libperf so that we
can guarantee it has proper maps.

Reviewed-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
 tools/lib/perf/evlist.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c
index 6b1bafe267a4..187129652ab6 100644
--- a/tools/lib/perf/evlist.c
+++ b/tools/lib/perf/evlist.c
@@ -40,11 +40,11 @@ static void __perf_evlist__propagate_maps(struct perf_evlist *evlist,
 	 * We already have cpus for evsel (via PMU sysfs) so
 	 * keep it, if there's no target cpu list defined.
 	 */
-	if (!evsel->own_cpus ||
-	    (!evsel->system_wide && evlist->has_user_cpus) ||
-	    (!evsel->system_wide &&
-	     !evsel->requires_cpu &&
-	     perf_cpu_map__empty(evlist->user_requested_cpus))) {
+	if (evsel->system_wide) {
+		perf_cpu_map__put(evsel->cpus);
+		evsel->cpus = perf_cpu_map__new(NULL);
+	} else if (!evsel->own_cpus || evlist->has_user_cpus ||
+		   (!evsel->requires_cpu && perf_cpu_map__empty(evlist->user_requested_cpus))) {
 		perf_cpu_map__put(evsel->cpus);
 		evsel->cpus = perf_cpu_map__get(evlist->user_requested_cpus);
 	} else if (evsel->cpus != evsel->own_cpus) {
@@ -52,7 +52,10 @@ static void __perf_evlist__propagate_maps(struct perf_evlist *evlist,
 		evsel->cpus = perf_cpu_map__get(evsel->own_cpus);
 	}
 
-	if (!evsel->system_wide) {
+	if (evsel->system_wide) {
+		perf_thread_map__put(evsel->threads);
+		evsel->threads = perf_thread_map__new_dummy();
+	} else {
 		perf_thread_map__put(evsel->threads);
 		evsel->threads = perf_thread_map__get(evlist->threads);
 	}
-- 
2.38.0.rc1.362.ged0d419d3c-goog