Optimal multicast communication in wormhole-routed torus networks
D. F. Robinson, Philip K. McKinley, Betty H. C. Cheng · IEEE Transactions on Parallel and Distributed Systems · 1995
This paper presents efficient algorithms that implement one-to-many, or multicast, communication in wormhole-routed torus networks. By exploiting the properties of the switching technology and the use of virtual channels, a minimum-time multicast algorithm is presented for n-dimensional torus networks that use deterministic, dimension-ordered routing of unicast messages. The algorithm can deliver a multicast message to m-1 destinations in [log/sub 2/ m] message-passing steps, while avoiding contention among the constituent unicast messages. Performance results of a simulation study on torus networks with up to 4096 nodes are also given.>