CXL

CXL (Compute Express Link) is an open industry standard for high-speed, cache-coherent interconnects between processors, memory expanders, and accelerators. It represents the industry bet that the future of computing is not larger monolithic chips but composable systems in which memory and accelerators are pooled resources connected by a fabric. CXL extends the PCIe physical layer with new protocols for memory expansion and device caching, enabling a system to treat remote memory as an extension of local memory — but the latency and coherence implications of this model are not yet fully understood.