diff options
Diffstat (limited to 'tools/lib/perf/evlist.c')
| -rw-r--r-- | tools/lib/perf/evlist.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c index 61b637f29b82..81e8b5fcd8ba 100644 --- a/tools/lib/perf/evlist.c +++ b/tools/lib/perf/evlist.c @@ -687,15 +687,14 @@ perf_evlist__next_mmap(struct perf_evlist *evlist, struct perf_mmap *map, void __perf_evlist__set_leader(struct list_head *list, struct perf_evsel *leader) { - struct perf_evsel *first, *last, *evsel; - - first = list_first_entry(list, struct perf_evsel, node); - last = list_last_entry(list, struct perf_evsel, node); - - leader->nr_members = last->idx - first->idx + 1; + struct perf_evsel *evsel; + int n = 0; - __perf_evlist__for_each_entry(list, evsel) + __perf_evlist__for_each_entry(list, evsel) { evsel->leader = leader; + n++; + } + leader->nr_members = n; } void perf_evlist__set_leader(struct perf_evlist *evlist) @@ -704,7 +703,23 @@ void perf_evlist__set_leader(struct perf_evlist *evlist) struct perf_evsel *first = list_entry(evlist->entries.next, struct perf_evsel, node); - evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; __perf_evlist__set_leader(&evlist->entries, first); } } + +int perf_evlist__nr_groups(struct perf_evlist *evlist) +{ + struct perf_evsel *evsel; + int nr_groups = 0; + + perf_evlist__for_each_evsel(evlist, evsel) { + /* + * evsels by default have a nr_members of 1, and they are their + * own leader. If the nr_members is >1 then this is an + * indication of a group. + */ + if (evsel->leader == evsel && evsel->nr_members > 1) + nr_groups++; + } + return nr_groups; +} |