perf_cpu_map__alloc
struct perf_cpu_map *cpus = perf_cpu_map__alloc(nr_cpus);
struct perf_cpu_map *cpus = perf_cpu_map__alloc(1);
struct perf_cpu_map *cpus = perf_cpu_map__alloc(1);
merged = perf_cpu_map__alloc(k);
cpus = perf_cpu_map__alloc(nr_cpus);
struct perf_cpu_map *perf_cpu_map__alloc(unsigned int nr_cpus);
struct perf_cpu_map *cpus = perf_cpu_map__alloc(nr);