evlist__parse_sample_timestamp
err = evlist__parse_sample_timestamp(evlist, event, ×tamp);
ret = evlist__parse_sample_timestamp(evlist, event, &last_timestamp);
err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
int evlist__parse_sample_timestamp(struct evlist *evlist, union perf_event *event, u64 *timestamp);
ret = evlist__parse_sample_timestamp(evlist, event, ×tamp);