Performance of Interconnection Network in Multithreaded Architectures

. In this paper, we analyze the performance of interconnection networks in a multithreaded multiprocessor using a closed queuing network model. Proposed integrated model of the multiprocessor system captures the interaction among subsystems faithfully. Our study reveals a strong relationship of workload parameters to the network performance and brings out a feedback effect of network response on message rate to the network. 1 Introduction Interconnection networks (IN) play a vital role in the performance of any multiprocessor system. Average time taken by a message to traverse the network, called the network latency, can greatly affect the performance. Previous studies on IN consider it as an open system. The message arrival rate is an input to the open system model, and the system is studied for each message arrival rate. Since the overall message rate to IN is not known a priori, these models cannot relate the workload characteristics to IN performance. Also near saturation region, ..