Re architecting Congestion Management in Lossless Ethernet

on YouTube ↗17m

" summary

Claims that existing lossless Ethernet congestion control fails because congestion detection and rate adjustment are ineffective and replaces them with Photonic Congestion Notification (PCN), which identifies culpable flows using a novel detection and identification mechanism and applies a receiver-driven rate adjustment that relieves congestion in as short as 1 RTT. PCN is implemented on DPDK NICs and validated with testbed experiments and simulations showing far fewer PFC PAUSEs and reduced flow completion time under concurrent burst and realistic workloads.

AI-written summary · about

" related talks

• 18mRevisiting Congestion Control for Lossless EthernetYiran Zhang, Qingkai Meng, Chaolei Hu, Fengyuan Ren · 21st USENIX Symposium on Networked Systems Design and Implementation (NSDI '24)
• 18mCCC: Re-architecting Delay-based Congestion Control in Datacenter NetworksFengyuan Ren, Jiawei Huang, Jianxin Wang, Haoyang Li, Wanchun Jiang, Kai Wang, Yujie Hu, Xiao Han, Danfeng Shan · NSDI '26
• 16mFLB: Fine-grained Load Balancing for Lossless Datacenter NetworksKai Chen, Wenxue Li, Jiawei Huang, Jianxin Wang, Jinbin Hu, Xiangzhou Liu, Junfeng Wang, Bowen Liu, Ping Yin · USENIX ATC '25
• 16mPowerTCP: Pushing the Performance Limits of Datacenter NetworksStefan Schmid, Vamsi Addanki, Oliver Michel · 19th USENIX Symposium on Networked Systems Design and Implementation (NSDI '22)
• 19mTackling DC Congestion and BurstsBalasubramanian Madhavan, Abhishek Dhamija · Networking @Scale Summer 2022
• 17mTowards provably performant congestion controlRuben Martins, Anup Agarwal, Srinivasan Seshan, Venkat Arun, Devdeep Ray · 21st USENIX Symposium on Networked Systems Design and Implementation (NSDI '24)
• 23mACK to the Future: TCP in 2025Philip Rowlands · SREcon25 Europe/Middle East/Africa
• 16mBackpressure Flow ControlKevin Zhao, Thomas E. Anderson, Mohammad Alizadeh, Georgios Nikolaidis, Prateesh Goyal, Preey Shah · 19th USENIX Symposium on Networked Systems Design and Implementation (NSDI '22)