Toward High-Fidelity Heterogeneous Memory System Modeling in gem5

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Abstract

HPC systems will employ various memory technologies to meet applications demands. The ability to model heterogeneous systems (from both compute and memory perspectives) makes gem5 a highly suitable tool to evaluate future HPC systems. In this work, we’ll discuss new contributions to gem5 that are extending its modeling support for heterogeneous memory systems. Specifically, we show the new DRAM cache model, the improved HBM model in gem5, and the refactoring of its memory controller models.