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Description
Compute Express Link (CXL) is a communication protocol that was led by Intel and developed collaboratively with other industry players. It enables high-speed, coherent interactions between CPUs, memory, and co-processors like GPUs and FPGAs. Without CXL, the rapid advancement of processor speeds and memory density can create a bottleneck or "memory wall." This occurs when CPU speed surpasses data transfer rates between CPU and memory, causing inefficiencies and processor idle time during memory fetch operations, which is particularly problematic in multi-core processors. This eBook provides more detail on how CXL allows for memory disaggregation, enhancing resource allocation efficiency by breaking the traditional memory-CPU linkage.