一、引言 CRAY—1S系列计算机系统是以一台处理速度很高、功能很强的通用中央处理机(CPU)为基础建立起来的。它所以有这样高的速度,是因为在中央处理机内兼有标量和向量计算能力,并且中央处理机与一个大容量的、高速的双极型集成电路存貯器相接。向量处理即对成组的有序数据进行重复运算的性能,所得结果的速率大大超过通常的标量处理速率。为了解决不适合向量技术求解的问题,标量运算弥补了向量运算的能力。表1—1列出了S系列计算机系统中现有的型号。这些型号将在以后更详细地介 I. INTRODUCTION The CRAY-1S series computer system is based on a general-purpose central processing unit (CPU) with high processing speed and powerful functions. So it is so high because of the scalar and vector computational capabilities of the central processing unit and the central processing unit to a large, high speed, bipolar integrated circuit memory. Vector processing is the performance of repeated operations on a group of ordered data, yielding results at rates well beyond the usual scalar processing rates. In order to solve the problem of unsuitable vectors, scalar operations make up for the ability of vector operations. Table 1-1 lists the existing models in S Series computer systems. These models will be introduced in more detail later