perf stat: Fallback to user only counters when perf_event_paranoid > 1

[mirror_ubuntu-artful-kernel.git] / tools / perf / builtin-stat.c

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 1f19f2f999c841b9da140e10bcaf5e6e0f41ee6b..307e8a1a003c5ebfd7eefe6a8770a868cd3b55e9 100644 (file)
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -528,6 +528,7 @@ static int __run_perf_stat(int argc, const char **argv)
                perf_evlist__set_leader(evsel_list);
 
        evlist__for_each(evsel_list, counter) {
+try_again:
                if (create_perf_stat_counter(counter) < 0) {
                        /*
                         * PPC returns ENXIO for HW counters until 2.6.37
@@ -544,7 +545,11 @@ static int __run_perf_stat(int argc, const char **argv)
                                if ((counter->leader != counter) ||
                                    !(counter->leader->nr_members > 1))
                                        continue;
-                       }
+                       } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
+                                if (verbose)
+                                        ui__warning("%s\n", msg);
+                                goto try_again;
+                        }
 
                        perf_evsel__open_strerror(counter, &target,
                                                  errno, msg, sizeof(msg));