Abstract: With the development of multi-core processors and the continuous growth of computation requirements, the scale of high-performance computer systems continues to increase.  Using simulators to simulate high-performance computing systems plays an important role in system design and optimization, and the interconnection network simulation is an indispensable part of it. This paper designs and implements a large-scale Infiniband interconnection network simulation system based on OMNet++. The system drives the network simulation process through the recorded parallel program MPI messages. It can simulate the working state of the interconnection network during the program execution, and can be integrated with the message-driven high-performance computer simulators. By comparing with the communication delay between nodes in the real cluster, the simulation accuracy is verified and the simulation performance is tested.

Key words: interconnection network simulation, OMNet++, Infiniband interconnection network, message-driven