I'm doing a Modelsim simulation with the Arria 10 EMIF DDR4. Using the IP generated testbench. The abstract PHY option is relative fast, using the DDR4 memory model is painfully slow.

Hi George,

Thanks for the details. Your finding is correct.

When you turn off abstract PHY, the simulation expect a memory component that allow the interface to perform read/write.

The bus functional model that generate using Platform designer (Qsys) will not work like a memory model (eg read/write from specific address). Thus, you have to replace the generic memory model in the project ​altera_emif_ddrx_model.sv model to make it work.

However, for system level simulation (eg, PCIE + EMIF), it is recommend to run the simulation using abstract phy mode as this will save the simulation time.

Rgds

BC