~/talk

CCC: Re-architecting Delay-based Congestion Control in Datacenter Networks

on YouTube 18m
Talkat NSDI '26 · 2026-05-04..05-06· [networking]

speakers

name:Wanchun Jiang
links:none on file
name:Haoyang Li
links:none on file
name:Kai Wang
links:none on file
name:Yujie Hu
links:none on file
name:Xiao Han
links:none on file
name:Danfeng Shan
links:none on file
name:Fengyuan Ren
links:none on file
name:Jiawei Huang
links:none on file
name:Jianxin Wang
links:none on file

resources

video:https://youtu.be/9NWJ8MiRq30
slides:none on file

summary

Claims that delay signals alone can match switch-assisted CC by adding a CiD trustworthiness layer that splits operating space into regions and switches between analytical vs probing rate adjustment rules. Implements CCC in DPDK and evaluates with large simulations showing CCC matches INT-based HPCC and PowerTCP and outperforms DCQCN TIMELY and SWIFT on link utilization, tail latency, and AI training completion time. Builds lightweight per‑connection logic, reactive probing for untrustworthy regions, and fast convergence to fair rates.

AI-written summary · about

chapters (11)

  1. 0:00Introduction
  2. 1:02Congestion control in DCNs
  3. 2:51Delay-based CC fundamentals
  4. 4:57Limitations of delay signals
  5. 8:28Flaws in existing solutions
  6. 9:36Trustworthy delay-based control
  7. 10:21Challenges in trustworthy control
  8. 13:12Implementation setup
  9. 14:13Testbed performance results
  10. 16:01Evaluation and workload tests
  11. 17:03Conclusion

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