tp_pmu__for_each_tp_sys
ret = tp_pmu__for_each_tp_sys(&args, add_tracepoint_multi_sys_cb);
return tp_pmu__for_each_tp_sys(&args, for_each_event_sys_cb);
tp_pmu__for_each_tp_sys(&count, num_events_sys_cb);
int tp_pmu__for_each_tp_sys(void *state, tp_sys_callback cb);