Performance analysis of finite buffered multistage interconnection networks

The authors present a model which can accurately evaluate the performance of single-buffered and multibuffered MINs (multistage interconnection networks) with 2×2 switching elements (SESs). Earlier models were inaccurate because of the simplicity, or hard to expand for larger SEs or buffer sizes due to their complexity. The proposed model for single-buffered MINs has only three states, including the blocked state, while it is very accurate by realistically modeling the transactions between buffers in adjacent stages and network cycles. The model was expanded for multibuffered MIN, and it was found to be still very accurate. Comparisons with simulation and the YLL model (see H.Y. Yoon et al., 1990) revealed that the proposed models are consistently much more accurate irrespective of the size of the network, buffer, and traffic condition. The proposed model can be easily expanded for any other structures and operation conditions of MINs