FLEXBAR: A crossbar switching fabric with improved performance and utilization

Proceedings of the IEEE 2002 Custom Integrated Circuits Conference (Cat. No.02CH37285) Pub Date : 2002-08-07 DOI:10.1109/CICC.2002.1012857

J. Chang, S. Ravi, A. Raghunathan

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引用次数: 12

Abstract

Crossbar based switching fabrics form a critical component of many modern high-performance electronic systems, including network routers and switches, multi-processor computing systems, and high-end application-specific integrated circuits (ASICs). This paper describes a simple, yet effective, hardware modification to enhance the performance and utilization of a generic crossbar. The proposed structure, called FLEXBAR, is based on the addition of lightweight, configurable, input and output hardware layers that exploit unutilized switching paths to provide additional data transfer capability for highly loaded paths. FLEXBAR has been implemented and evaluated as a network switch fabric. Extensive system simulations under various traffic scenarios indicate that latency reduces by up to 70%, and peak throughput of highly loaded ports can increase by over 100%. A full-custom design of FLEXBAR in 0.35 micron technology requires marginal area and performance overheads (4.47% and 8.23%, respectively, for a typical configuration) compared to a conventional crossbar.

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FLEXBAR:一种提高性能和利用率的横杆交换织物

基于横杆的交换结构构成了许多现代高性能电子系统的关键组件，包括网络路由器和交换机、多处理器计算系统和高端专用集成电路(asic)。本文介绍了一种简单而有效的硬件改进方法，以提高通用横杆的性能和利用率。所提出的结构称为FLEXBAR，是基于添加轻量级、可配置的输入和输出硬件层，利用未利用的交换路径为高负载路径提供额外的数据传输能力。FLEXBAR已经作为一种网络交换结构被实施和评估。在各种流量场景下的大量系统模拟表明，延迟最多可降低70%，高负载端口的峰值吞吐量可提高100%以上。与传统的横杆相比，采用0.35微米技术的FLEXBAR完全定制设计需要边际面积和性能开销(典型配置分别为4.47%和8.23%)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the IEEE 2002 Custom Integrated Circuits Conference (Cat. No.02CH37285)

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