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Parallel and Distributed Processing, IEEE Symposium on (1996)
New Orleans, LA
Oct. 23, 1996 to Oct. 26, 1996
ISSN: 1063-6374
ISBN: 0-8186-7683-3
pp: 36
Rajeev Sivaram , The Ohio State University
Dhabaleswar K. Panda , The Ohio State University
Craig B. Stunkel , I.B.M. T.J. Watson Research Center
This paper proposes a new approach for implementing fast multicast and broadcast in multistage interconnection networks (MINs) with multiport encoded multidestination worms. For a MIN with k x k switches and n stages such worms use n header flits each. One flit is used for each stage of the network and it indicates the output ports to which a multicast message must be replicated. A single multiport encoded worm has the capability to cover a large number of destinations with a single communication startup. A switch architecture is proposed for implementing multidestination worms without deadlock. Grouping algorithms of varying complexity are presented to derive the associated multiport encoded worms for a multicast to an arbitrary set of destinations. Using these worms a multinomial tree-based scheme is proposed to implement the multicast. This approach significantly reduces broadcast/multicast latency compared to schemes using unicast messages. Simulation studies indicate that improvement in broadcast/multicast latency up to a factor of 4 is feasible using the new approach. Interestingly, this approach is able to implement multicast with reduced latency as the number of destinations increases beyond a certain number.
Parallel architectures, multistage interconnection networks, interprocessor communication, collective communication, broadcast, multicast, wormhole routing, and virtual cut-through
Rajeev Sivaram, Dhabaleswar K. Panda, Craig B. Stunkel, "Efficient Broadcast and Multicast on Multistage Interconnnection Networks using Multiport Encoding", Parallel and Distributed Processing, IEEE Symposium on, vol. 00, no. , pp. 36, 1996, doi:10.1109/SPDP.1996.570314
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