RoCC: robust congestion control for RDMA
RoCC: robust congestion control for RDMA
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DOI：
10.1145/3386367.3431316
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发表时间：
2020-11
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通讯作者：
Parvin Taheri;Danushka Menikkumbura;E. Vanini;S. Fahmy;P. Eugster;T. Edsall
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文献类型：
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作者：
Parvin Taheri;Danushka Menikkumbura;E. Vanini;S. Fahmy;P. Eugster;T. Edsall
在本文中，我们提出了基于RDMA的数据中心网络的强大拥塞控制方法，将rocc switch switch queue大小作为PI控制器的输入，该尺寸计算了队列中的公平数据速率，从而向pi源发出了近距离的范围。我们的模拟和DPDK实现结果显示与DCQC相比，ROCC在高平均负载水平下产生的PFC框架最多可以减少，而ROCC可以达到8×较低的尾部潜伏期，与DCQCN和HPCC相比。
In this paper, we present RoCC, a robust congestion control approach for datacenter networks based on RDMA. RoCC leverages switch queue size as an input to a PI controller, which computes the fair data rate of flows in the queue, signaling it to the flow sources. The PI parameters are self-tuning to guarantee stability, rapid convergence, and fair and near-optimal throughput in a wide range of congestion scenarios. Our simulation and DPDK implementation results show that RoCC can achieve up to 7× reduction in PFC frames generated under high average load levels, compared to DCQCN. At the same time, RoCC can achieve up to 8× lower tail latency, compared to DCQCN and HPCC. We also find that RoCC does not require PFC. The functional components of RoCC are implementable in P4-based and fixed-function switch ASICs.