A Hierarchical Hybrid Optical-Electronic Network-on-Chip
A Hierarchical Hybrid Optical-Electronic Network-on-Chip
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DOI：
10.1109/isvlsi.2010.17
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发表时间：
2010-07
期刊：
影响因子：
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通讯作者：
M. K. Hung;Yaoyao Ye;Xiaowen Wu;Wei Zhang-;Weichen Liu;Jiang Xu
中科院分区：
文献类型：
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作者：
M. K. Hung;Yaoyao Ye;Xiaowen Wu;Wei Zhang-;Weichen Liu;Jiang Xu
片上网络（NoC）可以提高多处理器片上系统（MPSoC）的性能、能效和可扩展性。然而，在不久的将来，使用金属互连的传统noc需要消耗大量的功率来提供更高的通信带宽。光学noc基于cmos兼容的光波导和微谐振器，具有显著的带宽和功耗优势。在本文中，我们提出了一种混合光学网格NoC， HOME，它以分层的方式利用光波导和金属互连。HOME采用了一组新的协议来提高网络吞吐量和延迟。我们使用SPICE仿真和我们的周期精确多目标NoC仿真平台MoLab，将HOME与45纳米64核MPSoC的匹配光网格NoC进行了比较。与光网NoC相比，HOME使用的光/电子接口和激光二极管减少了75%。仿真结果表明，HOME的吞吐量提高了17%，延迟减少了40%，功耗降低了42%。
Network-on-chip (NoC) can improve the performance, power efficiency, and scalability of multiprocessor system-on-chip (MPSoC). However, traditional NoCs using metallic interconnects consume significant amount of power to deliver even higher communication bandwidth required in the near future. Optical NoCs are based on CMOS-compatible optical waveguides and micro resonators, and promise significant bandwidth and power advantages. In this paper, we propose a hybrid optical mesh NoC, HOME, which utilizes optical waveguides as well as metallic interconnects in a hierarchical manner. HOME employs a new set of protocols to improve the network throughput and latency. We compared HOME with a matched optical mesh NoC for a 64-core MPSoC in 45nm, using SPICE simulations and our cycle-accurate multi-objective NoC simulation platform, MoLab. Comparing with the optical mesh NoC, HOME uses 75% less optical/electronic interfaces and laser diodes. Simulation results show that HOME achieves 17% higher throughput and 40% less latency while consuming 42% less power.