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Unicast-based multicast communication in wormhole-routed networks

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4 Author(s)
McKinley, P.K. ; Dept. of Comput. Sci., Michigan State Univ., East Lansing, MI, USA ; Hong Xu ; Esfahanian, A.-H. ; Ni, L.M.

Multicast communication, in which the same message is delivered from a source node to an arbitrary number of destination nodes, is being increasingly demanded in parallel computing. System supported multicast services can potentially offer improved performance, increased functionality, and simplified programming, and may in turn be used to support various higher-level operations for data movement and global process control. This paper presents efficient algorithms to implement multicast communication in wormhole-routed direct networks, in the absence of hardware multicast support, by exploiting the properties of the switching technology. Minimum-time multicast algorithms are presented for n-dimensional meshes and hypercubes that use deterministic, dimension-ordered routing of unicast messages. Both algorithms can deliver a multicast message to m-1 destinations in [log 2 m] message passing steps, while avoiding contention among the constituent unicast messages. Performance results of implementations on a 64-node nCUBE-2 hypercube and a 168-node Symult 2010 2-D mesh are given

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Parallel and Distributed Systems, IEEE Transactions on  (Volume:5 ,  Issue: 12 )