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Deadlock-free multicast wormhole routing in 2-D mesh multicomputers

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3 Author(s)
Lin, Xiaola ; Dept. of Comput. Sci., Michigan State Univ., East Lansing, MI, USA ; McKinley, P.K. ; Ni, L.M.

Multicast communication services, in which the same message is delivered from a source node to an arbitrary number of destination nodes, are being provided in new-generation multicomputers. Broadcast is a special case of multicast in which a message is delivered to all nodes in the network. The nCUBE-2, a wormhole-routed hypercube multicomputer, provides hardware support for broadcast and a restricted form of multicast in which the destinations form a subcube. However, the broadcast routing algorithm adopted in the nCUBE-2 is not deadlock-free. In this paper, four multicast wormhole routing strategies for 2-D mesh multicomputers are proposed and studied. All of the algorithms are shown to be deadlock-free. These are the first deadlock-free multicast wormhole routing algorithms ever proposed. A simulation study has been conducted that compares the performance of these multicast algorithms under dynamic network traffic conditions in a 2-D mesh. The results indicate that a dual-path routing algorithm offers performance advantages over tree-based, multipath, and fixed-path algorithms

Published in:

Parallel and Distributed Systems, IEEE Transactions on  (Volume:5 ,  Issue: 8 )

Date of Publication:

Aug 1994

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