perf evlist: Add perf_evlist__id2sid method to get event ID related data
This will be helpful for PERF_FORMAT_GROUP samples where we need to
store ID related period value for each event.
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-twmlgsbyim97p7cyohjwb1df@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 10fcc03..da2dd92 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -337,21 +337,32 @@
return 0;
}
-struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
+struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id)
{
struct hlist_head *head;
struct perf_sample_id *sid;
int hash;
- if (evlist->nr_entries == 1)
- return perf_evlist__first(evlist);
-
hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
head = &evlist->heads[hash];
hlist_for_each_entry(sid, head, node)
if (sid->id == id)
- return sid->evsel;
+ return sid;
+
+ return NULL;
+}
+
+struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
+{
+ struct perf_sample_id *sid;
+
+ if (evlist->nr_entries == 1)
+ return perf_evlist__first(evlist);
+
+ sid = perf_evlist__id2sid(evlist, id);
+ if (sid)
+ return sid->evsel;
if (!perf_evlist__sample_id_all(evlist))
return perf_evlist__first(evlist);