面向全分布式VLIW结构的部分互连研究

随着VLSI技术的发展，传统的采用了全互连网络的全分布式超长指令字结构的功能单元通信开销，成为制约着处理器频率增加和规模扩大的瓶颈.在分析应用程序特征的基础上，利用定义的5种通信模式提出了多种全分布式超长指令字部分互连结构，分析了由全互连结构变为部分互连结构通信方式上的改变，并完成了功能单元指派和通信调度等相关的编译调整.模型分析和实验数据表明，相比全互连结构，部分互连结构在程序性能些微降低的情况下，面积、功耗等资源开销大幅减少，并呈现出良好的可扩展性.

Research on Partial-connected Crossbar for Full-distributed VLIW Architecture

With the development of VLSI technology, the communication overhead of functional units of the full-connected network for full-distributed VLIW has become a bottleneck restricting the increase in processor frequency and scale. Based on the analysis on the characteristics of the application and 5 defined communication models, a variety of partial-connected architectures for fully-distributed VLIW were presented. The difference between partial-connected and full-connected architectures was analyzed and the related compilation modulation was accomplished, especially function unit designation and communication scheduling. Model analysis and experimental data show that, compared with full-connected architecture, partial-connected architecture can substantially reduce area and power consumption and resource overhead, and gain considerable scalability, while program performance is slightly lower.