基于可编程数据平面的PFC算法实现  

Implementation of Priority Flow Control Algorithm Based on Programmable Data Plane

作　　者：耿俊杰 颜金尧[1] GENG Jun-jie;YAN Jin-yao(School of Information and Communication Engineering,Communication University of China,Beijing 100024,China)

机构地区：[1]中国传媒大学信息与通信工程学院,北京100024

出　　处：《计算机技术与发展》2021年第1期116-121,共6页Computer Technology and Development

基　　金：国家重点研发计划(2019YFB1804300);国家自然科学基金面上项目(61971382)

摘　　要：当前高吞吐量、超低延迟的高性能无损数据中心网络成为研究的热点。传统TCP/IP协议是为广域网设计的,在高速网络条件下(特别是随着10 Gb/s的网络接口的普及)会存在I/O瓶颈问题;远程直接数据存取技术RDMA(remote direct memory access)是为了解决网络传输中终端主机的数据处理延迟、降低CPU负载而产生的,最早应用在高性能计算领域。RDMA技术基于优先级流量控制PFC算法实现了无损传输网络。首先介绍了可编程数据平面技术和高性能数据中心网络的研究现状,并基于可编程数据平面以软件定义的方式实现了PFC算法,进而实现了可编程的无损数据中心网络,并在仿真网络环境下对实现的PFC算法进行了性能测试。实验结果显示在可编程数据平面下实现的PFC算法达到了无损传输的目标。同时证明了可编程数据平面技术在高性能数据中心网络的实现中可以发挥巨大作用,相对于传统的网络架构,可编程数据平面技术由于采用了软件定义的方式,因此更加灵活、高效。At present,the lossless data center network with high throughput,ultra-low delay and high performance has become a research hotspot.Traditional TCP/IP protocol is designed for wide area networks.TCP/IP stacks will suffer I/O bottlenecks under high-speed network conditions(especially with the popularity of 10 Gb/s network interfaces).RDMA(remote direct memory access)is developed to solve the data processing delay of the terminal host in network transmission and reduce the CPU load,which was first applied in the field of high performance computing.RDMA realizes lossless transmission network based on PFC(priority flow control).We first introduce the research status of programmable data plane technology and high-performance data center network and realize the PFC algorithm based on programmable data plane in the way of software definition,and then realize the programmable lossless data center network and test the performance of the realized PFC algorithm under the simulation network environment.The experiment shows that the PFC framework realized under the programmable data plane achieves the goal of lossless transmission.At the same time,it is proved that the programmable data plane technology can play a huge role in the realization of high-performance data center network.Compared with the traditional network architecture,the programmable data plane technology is more flexible and efficient since adoption of the way of software definition.

关 键 词：可编程数据平面 数据中心 无损传输 高性能网络 流量控制 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]