Stanford's Ousterhout: AI workloads are outgrowing TCP
AI Engineer · youtube · 2026-09-17
In an AI Engineer talk, Stanford's John Ousterhout argues AI traffic has changed shape: agentic inference has shrunk GPU compute phases to milliseconds, making synchronization metadata exchange — not throughput — the bottleneck. TCP's sender-side congestion control learns about receiver-side queues via 1 bit, several round trips late. Homa, from Behnam Montazeri's Stanford dissertation, inverts this: receiver-driven grants, messages instead of byte streams, short messages overtaking long ones, benchmarked against TCP.
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