Fast collective communication by packets in the postal model

Journal Article


Collective communication operations play an important role in message‐passing systems and have been extensively investigated. We study two widely used collective communication operations: gossiping and all‐to‐all personalized communication. We assume the multiport postal model of communication that seems particularly suited for developing fast and portable algorithms on current technology parallel computers. Unlike most of the previous work on the subject, we assume that processors communicate by sending messages of limited size. Indeed, when the maximum size of a message is fixed, the number of rounds required by a communication algorithm gives a realistic measure of the performance of the algorithm. We provide an optimal algorithm for the gossiping operation and an almost‐optimal algorithm for the all‐to‐all personalized communication operation. © 1998 John Wiley & Sons, Inc. Networks 31:67–79, 1998

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