Study of multistage SIMD interconnection networks
ISCA '78 Proceedings of the 5th annual symposium on Computer architecture
Using a Multipath Network for Reducing the Effects of Hot Spots
IEEE Transactions on Parallel and Distributed Systems
CGIN: A Fault Tolerant Modified Gamma Interconnection Network
IEEE Transactions on Parallel and Distributed Systems
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The augmented data manipulator (ADM), inverse augmented data manipulator (IADM), and the gamma network are based on the Plus-Minus-2i connection patterns. In such a network there exist multiple paths to connect a source S to a destination D except when S=D. The number of paths for (S,D) is a function of the tag value (D-S) modulo N, and the size of the network N.parIt is shown in this paper that by adding an extra stage to the original PM21 interconnection network, multiple paths are provided for all the tag value including 0. The extra stage can be any stage out of n=log2N stages of the original network.The analyses on the distribution of the number of paths for various tag values are performed for n possible choices of the extra stage. It is shown that the extra stage of 0, +1, -1 connection patterns gives the most uniform distribution, and also results in a 1-fault tolerant interconnection network.