__DML_MAX_BW_RATIO_PRE__
double max_vratio_pre = __DML_MAX_BW_RATIO_PRE__; // Default value is 4
*PrefetchBandwidthSupport = (*MaxPrefetchBandwidth <= ReturnBW) && (TotalPrefetchBandwidth <= TotalActiveBandwidth * __DML_MAX_BW_RATIO_PRE__) && !NotEnoughUrgentLatencyHiding;