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Fully adaptive minimal deadlock-free packet routing in hypercubes, meshes, and other networks: algorithms and simulations

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4 Author(s)
Pifarre, G.D. ; Adv. Solutions Group, IBM, Buenos Aires, Argentina ; Gravano, L. ; Felperin, S.A. ; Sanz, J.L.C.

This paper deals with the problem of packet-switched routing in parallel machines. Several new routing algorithms for different interconnection networks are presented. While the new techniques apply to a wide variety of networks, routing algorithms will be shown for the hypercube, the two-dimensional mesh, and the shuffle-exchange. Although the new techniques are designed for packet routing, they can be used alternatively for virtual cut-through routing models. The techniques presented for hypercubes and meshes are fully-adaptive and minimal. A fully-adaptive and minimal routing is one in which all possible minimal paths between a source and a destination are of potential use at the time a message is injected into the network. Minimal paths followed by messages ultimately depend on the local congestion encountered in each node of the network. All of the new techniques are completely free of deadlock situations

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Parallel and Distributed Systems, IEEE Transactions on  (Volume:5 ,  Issue: 3 )