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Learn about Congestion Signaling (CSIG), a cutting-edge network technology designed to address the unique challenges of modern AI workloads in this 16-minute conference talk from the Open Compute Project. Discover how traditional network congestion signals fail to capture the detailed fabric bottleneck conditions needed for AI workloads that send millisecond-duration traffic bursts, and explore how CSIG provides a revolutionary solution through always-on, line-rate telemetry in application context. Understand the technical implementation of CSIG, which offers sub-millisecond-granularity switch traffic measurements and fine-grained, per-packet feedback for congestion control that captures both the congestion state and location of bottlenecks along network paths. Examine real-world deployment results from Google's implementation, including demonstrated performance improvements to congestion control and load balancing systems. Gain insights into how CSIG telemetry uniquely enables understanding of real-world workload behavior and learn about the standardization efforts currently underway at UEC with support from multiple switch vendors.
