WaferTrans: Enabling IOMMU-free Distributed Virtual Address Translation for Wafer-scale GPUs

Xinru Tang, Jingxiang Hou, Guanghong Wu +2

Wafer-scale GPUs (WSGs) provide sufficient on-wafer bandwidth to make near-lossless Unified Memory feasible. However, existing designs still rely on a CPU-IOMMU to translate remote…