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<p><b>Abstract</b>—The <it>switching</it> scheme of a point-to-point network determines how packets flow through each node, and is a primary element in determining the network's performance. In this paper, we present and evaluate a new switching scheme called <it>hybrid</it> switching. Hybrid switching dynamically combines both virtual cut-through and wormhole switching to provide higher achievable throughput than wormhole alone, while significantly reducing the buffer space required at intermediate nodes when compared to virtual cut-through. This scheme is motivated by a comparison of virtual cut-through and wormhole switching through cycle-level simulations, and then evaluated using the same methods. To show the feasibility of hybrid switching, as well as to provide a common base for simulating and implementing a variety of routing and switching schemes, we have designed SPIDER, a communication adapter built around a custom ASIC called the <it>Programmable Routing Controller</it> (PRC).</p>
Virtual cut-through switching, wormhole routing, hybrid switching, routing controllers, parallel and distributed multicomputers.

K. G. Shin and S. W. Daniel, "Analysis and Implementation of Hybrid Switching," in IEEE Transactions on Computers, vol. 45, no. , pp. 684-692, 1996.
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