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-rw-r--r--tools/perf/util/evsel.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 8c54df61fe64..4c2b31dc4e4d 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -253,6 +253,34 @@ struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
return evsel;
}
+struct perf_evsel *perf_evsel__new_cycles(void)
+{
+ struct perf_event_attr attr = {
+ .type = PERF_TYPE_HARDWARE,
+ .config = PERF_COUNT_HW_CPU_CYCLES,
+ };
+ struct perf_evsel *evsel;
+
+ event_attr_init(&attr);
+
+ perf_event_attr__set_max_precise_ip(&attr);
+
+ evsel = perf_evsel__new(&attr);
+ if (evsel == NULL)
+ goto out;
+
+ /* use asprintf() because free(evsel) assumes name is allocated */
+ if (asprintf(&evsel->name, "cycles%.*s",
+ attr.precise_ip ? attr.precise_ip + 1 : 0, ":ppp") < 0)
+ goto error_free;
+out:
+ return evsel;
+error_free:
+ perf_evsel__delete(evsel);
+ evsel = NULL;
+ goto out;
+}
+
/*
* Returns pointer with encoded error via <linux/err.h> interface.
*/