Hybrid-TF: A New Hybrid Interconnection Network Topology for High Performance Computing

Since the scale of the high performance systems continues to expand, it brings huge challenges to the high performance computing (HPC) network. Because HPC applications have various communication pattern, the higher communication performance of the application is obtained if the network topology matches the communication pattern effectively. Therefore, based on the communication traffic characteristics of HPC applications, a new hybrid interconnection network topology named Hybrid-TF is proposed combing the advantage of direct and indirect networks in this paper. The routing strategies of Hybrid-TF is also presented. Using the point-to-point and collective communication patterns of HPCG on the NS-3 network simulator, we evaluated the communication performance of the traditional direct and indirect topology and the new hybrid interconnection network topology. The simulation results show that the Hybrid-TF topology can achieve lower communication delay and improve network performance under different traffic patterns.