perf_pmu__mem_events_num_mem_pmus
rec_argc = argc + 11 * (perf_pmu__mem_events_num_mem_pmus(pmu) + 1);
rec_argc = argc + 9 * (perf_pmu__mem_events_num_mem_pmus(pmu) + 1);
perf_pmu__mem_events_num_mem_pmus(NULL) * PERF_MEM_EVENTS__MAX * 128;
int perf_pmu__mem_events_num_mem_pmus(struct perf_pmu *pmu);