摘要： 多个ＲＩＳＣＭ处理器构成的对称多处理器系统正在成为多机并行系统的主流产品。在对称多处理器系统中，所有处理器的地位都是相同的，所有的系统资源都具有相同的可访问性，系统依据仲裁算法自动调度处理器访问控制权。通过分析当前多处理器系统的代表机型Ｓｐａｒｃ２０的加电自检程序，对多机系统的处理器转换机制进行了研究，给出了其切换时机和实现过程的算法描述。

关键词: 多处理器转换, Sparc体系结构, 加电自检

Abstract: Consisting of a set of RISC microprocessors. the symmetrical multiprocessing is the most common example of parallel organization today. In a SMP system, all processors share access system resources. A mechanism is provided to arbitrate processors competing requests for system control. As a result of analysing the power-on self test programs of Spare20 workstation, a representative of multiprocessing system. this paper depicts the mechanism of CPUs alternating, including its opportunity and implement scheme.

中图分类号: 

• TP332