diff options
Diffstat (limited to 'tools/perf/builtin-stat.c')
| -rw-r--r-- | tools/perf/builtin-stat.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 69523ed55894..7cc61eb0d83b 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -582,6 +582,32 @@ static bool perf_evsel__should_store_id(struct perf_evsel *counter) return STAT_RECORD || counter->attr.read_format & PERF_FORMAT_ID; } +static struct perf_evsel *perf_evsel__reset_weak_group(struct perf_evsel *evsel) +{ + struct perf_evsel *c2, *leader; + bool is_open = true; + + leader = evsel->leader; + pr_debug("Weak group for %s/%d failed\n", + leader->name, leader->nr_members); + + /* + * for_each_group_member doesn't work here because it doesn't + * include the first entry. + */ + evlist__for_each_entry(evsel_list, c2) { + if (c2 == evsel) + is_open = false; + if (c2->leader == leader) { + if (is_open) + perf_evsel__close(c2); + c2->leader = c2; + c2->nr_members = 0; + } + } + return leader; +} + static int __run_perf_stat(int argc, const char **argv) { int interval = stat_config.interval; @@ -618,6 +644,15 @@ static int __run_perf_stat(int argc, const char **argv) evlist__for_each_entry(evsel_list, counter) { try_again: if (create_perf_stat_counter(counter) < 0) { + + /* Weak group failed. Reset the group. */ + if (errno == EINVAL && + counter->leader != counter && + counter->weak_group) { + counter = perf_evsel__reset_weak_group(counter); + goto try_again; + } + /* * PPC returns ENXIO for HW counters until 2.6.37 * (behavior changed with commit b0a873e). |
