龙芯2号同时多线程处理器的软硬件接口设计  

Hardware/Software Interface Design of Godson-2 Simultaneous Multithreading Processor

作　　者：李祖松[1,2] 许先超[1,2] 胡伟武[1] 唐志敏[1] 

机构地区：[1]中国科学院计算技术研究所 [2]中国科学院研究生院,北京100049

出　　处：《软件学报》2007年第7期1806-1817,共12页Journal of Software

基　　金：国家杰出青年基金No.60325205;国家高技术研究发展计划(863)Nos.2002AA110010;2005AA110010;2005AA119020;国家重点基础研究发展计划(973)No.2005CB321601;中国科学院知识创新工程No.KGCX2-109;中国科学院计算技术研究所基础研究基金No.20056020~~

摘　　要：随着生产工艺的提高,芯片上能集成越来越多的晶体管,多线程技术也逐步成为一种主流的处理器体系结构技术,而多线程处理器的软硬件接口也就成为急需解决的问题.在分析同时多线程的软件需求的基础上,提出龙芯2号同时多线程处理器的软硬件接口协同设计解决方案,给出相应的操作系统实现方案.同时,在Linux2.4.20的基础上实现了龙芯2号同时多线程处理器相应的操作系统.通过运行SPEC CPU2000等测试程序进行性能评测,充分说明实现软硬件接口的龙芯2号同时多线程处理器极大地提高了多进程负载的性能.分析和设计方案不仅适用于同时多线程处理器,而且对于片内多核处理器的设计也有借鉴作用.With the development of VLSI （very large scale integrated circuit） technology, a single chip can contain over one billion transistor. Multithreading technique is the developing trend of high performance processor in the future. How to design hardware/software interface has become a major problem for multithreading processor. According to simultaneous multithreading processor requirement and the original Godson-2 architecture, the hardware/software interface for Godson-2 simultaneous multithreading processor is advanced and defined. Based on this interface, the corresponding Linux for Godson-2 SMT （simultaneous multithreading） processor is designed and implemented on Linux 2.4.20. The SPEC CPU2000 and some other benchmark programs are used to compare the performance of Godson-2 SMT processor with the superscalar processor. The results show that the Godson-2 SMT processor designed with the interface can get a much better performance. The hardware/software interface and operating system design in this paper are also very useful for the multi-core processor design.

关 键 词：龙芯2号 同时多线程 微体系结构 LINUX操作系统 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]