Accurately modeling the on-chip and off-chip GPU memory subsystem

To evaluate and quantify our claims, we accurately modeled the aforementioned memory components in an extended version of the state-of-the-art Multi2Sim heterogeneous CPU-GPU processor simulator. Experimental results show important deviations, which can vary the final system performance provided by the simulation framework up to a factor of three. The proposed GPU model has been compared and validated against the original framework and the results from a real AMD Southern-Islands 7870HD GPU.