LIVE Q&A #3

on YouTube ↗22m

" summary

Team uses eBPF to tune transport in-kernel without rewriting TCP, packaging programs as a single binary golden image for fast rollout and minute-scale rollback. A centralized controller aggregates per-host telemetry then sets one service-wide threshold derived from BDP and flow count — ECN threshold tuned to BDP — to balance DCTCP and Cubic across shared queues. RX offload coalescing with ECN-marked packets increases CPU, and using an SK local map trades memory for fewer callbacks.

AI-written summary · about

" chapters (10)

1. 0:00Live Q&A
2. 1:50Kernel vs user-space transport
3. 5:21DCTCP with hardware offloads
4. 6:48Mixed data center traffic
5. 8:50Dynamic window tuning control
6. 12:24BPF deployment challenges
7. 14:57BPF policy conflicts
8. 17:24BPF tuning overhead
9. 19:57BPF future vs kernel
10. 22:01Closing remarks

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