[PATCH v4 2/6] perf evlist: Clear all_cpus before propagating

[Ian Rogers]

all_cpus is merged into during propagation. Initially all_cpus is set
from PMU sysfs. perf_evlist__set_maps will recompute it and change
evsel->cpus to user_requested_cpus if they are given. If all_cpus isn't
cleared then the union of the user_requested_cpus and PMU sysfs values
is set to all_cpus, whereas just user_requested_cpus is necessary. To
avoid this make all_cpus empty prior to propagation.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/lib/perf/evlist.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c
index a09315538a30..974b4585f93e 100644
--- a/tools/lib/perf/evlist.c
+++ b/tools/lib/perf/evlist.c
@@ -59,6 +59,10 @@ static void perf_evlist__propagate_maps(struct perf_evlist *evlist)
 {
 	struct perf_evsel *evsel;
 
+	/* Recomputing all_cpus, so start with a blank slate. */
+	perf_cpu_map__put(evlist->all_cpus);
+	evlist->all_cpus = NULL;
+
 	perf_evlist__for_each_evsel(evlist, evsel)
 		__perf_evlist__propagate_maps(evlist, evsel);
 }
-- 
2.36.0.464.gb9c8b46e94-goog