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SOME-Bus-NOW: a Network of Wrkstations with broadcast

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2 Author(s)
Katsinis, C. ; Dept. of Electr. & Comput. Eng., Drexel Univ., Philadelphia, PA, USA ; Hecht, D.

Networks of Workstations have been mostly designed using switch-based architectures and programming based on message passing. This paper describes a network of workstations based on the Simultaneous Optical Multiprocessor Exchange Bus (SOME-Bits) which is a low-latency, high-bandwidth interconnection network that directly links arbitrary pairs of processor nodes without contention, and can efficiently interconnect several hundred nodes. Each node has a dedicated output channel and an array of receivers, with one receiver dedicated to every other node's output channel. The SOME-Bus eliminates the need for global arbitration and provides bandwidth that scales directly with the number of nodes in the system. Under the Distributed Shared Memory (DSM) paradigm, the SOME-bus allows strong integration of the transmitter, receiver and cache controller hardware to produce a highly integrated system-wide cache coherence mechanism. This paper examines switch-based networks that maintain high performance under varying degrees of application locality, and compares them to the SOME-Bus, in terms of latency and processor utilization.

Published in:

Network Computing and Applications, 2003. NCA 2003. Second IEEE International Symposium on

Date of Conference:

16-18 April 2003

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