What is Compute Express Link (CXL)?CXL is an open-standard interconnect technology that enables high-speed, low-latency communication between processors and accelerators.
CXL is an open-standard interconnect technology that enables high-speed, low-latency communication between processors and accelerators.
Compute Express Link (CXL) is an open-standard interconnect technology built on the PCIe physical layer. It enables high-bandwidth, low-latency communication between host processors and devices such as accelerators, memory buffers, and smart NICs. CXL maintains memory coherency between the CPU memory space and memory on attached devices, allowing for a unified memory space and resource sharing. This technology is crucial for AI and machine learning (ML) workloads, as it facilitates efficient data movement and processing across heterogeneous computing systems.
CXL supports three key protocols: CXL.io for I/O operations, CXL.cache for accessing and caching host memory, and CXL.mem for coherent memory access. CXL is vital in advancing AI and high performance computing (HPC) architectures by enabling more efficient resource utilization and reducing software complexity.
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