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Design of a high-speed optical interconnect for scalable shared-memory multiprocessors

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2 Author(s)
Avinash Karanth Kodi ; Arizona Univ., Tucson, AZ, USA ; Louri, A.

Large-scale distributed shared-memory multiprocessors (DSMs) provide a shared address space by physically distributing the memory among different processors. A fundamental DSM communication problem that significantly affects scalability is an increase in remote memory latency as the number of system nodes increases. Remote memory latency, caused by accessing a memory location in a processor other than the one originating the request, includes both communication latency and remote memory access latency over I/O and memory buses. The proposed architecture reduces remote memory access latency by increasing connectivity and maximizing channel availability for remote communication. It also provides efficient and fast unicast, multicast, and broadcast capabilities, using a combination of aggressively designed multiplexing techniques. Simulations show that this architecture provides excellent interconnect support for a highly scalable, high-bandwidth, low-latency network.

Published in:

Micro, IEEE  (Volume:25 ,  Issue: 1 )