Computer Express Link (CXL) is a new computing interconnection standard
Tencent Technologies News, March 12, according to foreign media reports, an alliance of Intel, Microsoft, Alibaba, Cisco, Dell, Facebook, Google, Hewlett-Packard and Huawei has created a new computing interconnection standard, Compute Express Link (CXL), to achieve ultra-fast interconnection between data center CPUs and accelerator chips.
The CXL Alliance of these technology companies has approved CXL Specification 1.0, which will improve communication between CPUs and other devices, such as auxiliary processors or accelerators. In addition, it can provide better interconnection and memory consistency to improve the performance of data-intensive applications.
The new open standards will help foster an open accelerator ecosystem for high performance, heterogeneous computing. Companies and institutions interested in this are encouraged to join the organization. But it's worth noting that Intel's competitor AMD is not yet a member of the alliance. CXL is an open industry standard designed to support open ecosystems of data center accelerators and other high-speed enhancements. CXL Specification 1.0 is now available.
Accelerator includes graphics processing unit (GPU), field programmable gate array (FPGA) and other special accelerator solutions. This technology is based on the mature PCI Express (PCIe) infrastructure, and provides advanced protocols in three key areas: input/output protocol, memory protocol and consistency interface using the physical and electrical interfaces of PCIe 5.0. These protocols allow memory sharing among different computing resources, thereby reducing the complexity of the software stack and the overall system cost. This allows users to focus on the target workload rather than on the redundant memory management hardware in their accelerators.
CXL aims to become an industry open standard interface for high-speed communications, as accelerators are increasingly used to supplement CPUs to support emerging applications such as AI and machine learning. This standard applies to companies joining the CXL Alliance.