F-PFC:基于INT的PFC优化方案

Remote Direct Memory Access (RDMA) technology rapidly changes the landscape of nowadays datacenter. To deploy RDMA in production data centers, Priority-based Flow Control(PFC) and congestion control(CC) are deployed in Converged Ethernet. However, a lossless network does not guarantee low latency even with CC enabled. When network congestion happens, switch queues still build-up due to the response latency of end-to-end solutions. Motivated by the above problem, we propose F-PFC, a PFC optimization scheme based on (INT). F-PFC uses INT as a communication method among switches, reacts to the ephemeral congestion quickly and control flow rate in a fine-grained way. We perform simulations on NS3 and the results show that F-PFC can ensures low queue buildup, and reduce the tail latency.