DML_FAIL_V_RATIO_PREFETCH
status = DML_FAIL_V_RATIO_PREFETCH;
status = DML_FAIL_V_RATIO_PREFETCH;
status = DML_FAIL_V_RATIO_PREFETCH;
status = DML_FAIL_V_RATIO_PREFETCH;
case DML_FAIL_V_RATIO_PREFETCH: return "Vertical ratio prefetch";