perf_evsel__alloc_id
perf_evsel__alloc_id(evsel, evsel->fd->max_x, evsel->fd->max_y) < 0)
int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
!perf_evsel__alloc_id(&evsel->core, 1, 1));
if (perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr))
if (perf_evsel__alloc_id(&evsel->core, 1, nr_ids))
if (perf_evsel__alloc_id(&evsel->core, 1, n_ids))