CXL 1.1 vs. CXL 2.0 – What’s the difference?

Presented by

Danny Volkind and Elad Shliselberg, UniFabriX

About this talk

Compute Express Link™ (CXL™) is a high-speed interconnect offering coherency and memory semantics using high-bandwidth, low-latency connectivity between host processor and devices such as accelerators, memory buffers, and smart I/O devices. The CXL 1.1 specification introduced and defined the CXL I/O protocol, memory protocol, and coherency interface. The CXL 2.0 specification adds support for switching for fan-out to connect to more devices; memory pooling for increased memory utilization efficiency and providing memory capacity on demand; and support for persistent memory. This webinar will share a high-level overview of CXL 1.1, and the enhancements made in CXL 2.0 focusing on switching, memory pooling, Single Logical Devices (SLD) vs. Multiple Logical Devices (MLD), and fabric management. The presentation will also explore managed hot-plug, memory QoS telemetry, speculative reads, and security enhancements.
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Compute Express Link® (CXL®) is a new breakthrough high-speed CPU interconnect that enables a high-speed, efficient performance between the CPU and platform enhancements and workload accelerators. Industry leaders Alibaba, Cisco, Dell EMC, Facebook, Google, Hewlett Packard Enterprise, Huawei, Intel Corporation and Microsoft have teamed up to form an open industry standard group to develop technical specifications that facilitate breakthrough performance for emerging usage models while supporting an open ecosystem for data center accelerators and other high-speed enhancements.