Pim073.jpg

: CXL-based memory expansion offers approximately 8x lower latency compared to network-based RDMA (Remote Direct Memory Access).

PIM is a computing paradigm where data processing occurs directly within the memory chips (like DRAM) rather than moving it back and forth to a central CPU or GPU. This eliminates the "memory wall"—the performance bottleneck caused by the slow and energy-intensive transfer of data between memory and processors. 2. The CENT Architecture pim073.jpg

: A 2MB buffer on each device receives "CENT instructions" from a host CPU. These are then decoded into micro-ops for the memory units. : CXL-based memory expansion offers approximately 8x lower

: The device's internal decoder converts high-level instructions into micro-ops. pim073.jpg

PIM Is All You Need: A CXL-Enabled GPU-Free System ... - arXiv