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An important service in distributed systems, as multiprocessors, is the ability to transmit multicast messages. Cache coherence protocols and parallel algorithms are examples of applications requiring multicast messages. To transmit a multicast message to n targets, in networks-on-chip without multicast service, the source router must transmit n identical messages. Few works in the literature describe multicasting in oCs. The goal of this work is to implement a deadlock free routing algorithm for wormhole-switched mesh oCs, enabling to transmit simultaneous multicast messages. The dual-path multicast algorithm, used in multicomputers, is adapted to oCs in this work.
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