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<p><b>Abstract</b>—Wormhole routing is widely employed in current generation multicomputers and the design of deadlock-free wormhole routing algorithms is an important problem. In this note, we prove a tight lower bound on the number of channels required by a broad class of deadlock-free wormhole routing algorithms. This result has applications in proving that certain topologies do not admit deadlock-free wormhole routing algorithms, as well as applications in the design and analysis of fault-tolerant wormhole routing algorithms.</p>
Wormhole routing, deadlock-free routing algorithms, fault tolerance.

R. Libeskind-Hadas, "A Tight Lower Bound on the Number of Channels Required for Deadlock-Free Wormhole Routing," in IEEE Transactions on Computers, vol. 47, no. , pp. 1158-1160, 1998.
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