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Dynamically-allocated multi-queue buffers for VLSI communication switches

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2 Author(s)
Tamir, Y. ; Dept. of Comput. Sci., California Univ., Los Angeles, CA, USA ; Frazier, G.L.

Small n×n switches are key components of interconnection networks used in multiprocessors and multicomputers. The architecture of these n×n switches, particularly their internal buffers, is critical for achieving high-throughput low-latency communication with cost-effective implementations. Several buffer structures are discussed and compared in terms of implementation complexity, inter-switch handshaking requirements, and their ability to deal with variations in traffic patterns and message lengths. A design for buffers that provide non-FIFO message handling and efficient storage allocation for variable size packets using linked lists managed by a simple on-chip controller is presented. The new buffer design is evaluated by comparing it to several alternative designs in the context of a multistage interconnection network. The modeling and simulation show that the new buffer outperforms alternative buffers and can thus be used to improve the performance of a wide variety of systems currently using less efficient buffers

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Computers, IEEE Transactions on  (Volume:41 ,  Issue: 6 )