基于网络包延迟偏差的硬件动态拥塞控制机制

A hardware dynamic congestion-control mechanism based on packet delay variation

互连网络已经成为提升高性能计算系统性能的技术瓶颈。对高性能互连网络中的拥塞控制进行研究,针对通信热点的形成过程,给出了一种基于网络包延迟偏差的硬件动态拥塞控制机制CMDPD,利用网络包传输延迟偏差预判网络拥塞状态,控制端到端网络注入,避免拥塞形成。构建了模拟环境,在Fat-tree和Dragonfly两种网络结构下,对CMDPD进行了模拟实验。结果表明,在Fat-tree网络中CMDPD的吞吐率可提高5%~12%。

Interconnection networks have become a technical bottleneck to improve the performance of high-performance computing systems.The congestion control in high-performance interconnection networks is studied.Aiming at the formation process of communication hotspots,a hardware dynamic congestion control mechanism（CMDPD）is proposed.The transmission delay variation of packets is used to predict the network congestion state,and the end-to-end network injection is controlled to avoid the network congestion.The simulation environment is built up,and CMDPD is simulated under Fattree and Dragonfly networks.The results show that the throughput of CMDPD in Fat-tree network is improved by 5%~12%.