perf_event__synthesize_cpu_map
err = perf_event__synthesize_cpu_map(&rec->tool, rec->evlist->core.all_cpus,
!perf_event__synthesize_cpu_map(NULL, cpus, process_event_mask, NULL));
!perf_event__synthesize_cpu_map(NULL, cpus, process_event_cpus, NULL));
!perf_event__synthesize_cpu_map(NULL, cpus, process_event_range_cpus, NULL));
err = perf_event__synthesize_cpu_map(tool, evlist->core.user_requested_cpus, process, NULL);
int perf_event__synthesize_cpu_map(const struct perf_tool *tool, const struct perf_cpu_map *cpus, perf_event__handler_t process, struct machine *machine);