PCIe
Understanding Compute Express Link (CXL) and Its Alignment with the PCIe Specifications
How CXL Uses PCIe Electricals and Transport Layers
CXL utilizes the PCIe infrastructure, starting with the PCIe 5.0. This ensures compatibility with existing systems while introducing new features for device connectivity and memory coherency. CXL’s ability to maintain memory coherency across shared memory pools is a significant advancement, allowing for efficient resource sharing and operand movement between accelerators and target devices.
CXL builds upon the familiar foundation of PCIe, utilizing the same physical interfaces, transport layer, and electrical signaling. This shared foundation makes CXL integration with existing PCIe systems seamless. Here’s a breakdown of how it works:
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