Clock event suppression algorithm of VELVET and its application to S-820 development

Y. Takamine, Shunsuke Miyamoto, Shigeo Nagashima, Masayuki Miyoshi, S. Kawabe
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引用次数: 7

Abstract

An advanced clock event suppression algorithm for high-speed logic simulation is described. A signal value, Cn, and a current clock (CC), which indicates the current status of clock signals, has been introduced to realize this algorithm. This algorithm suppresses about 60% of the total events, and eliminates 40% of CPU time. No overhead is needed to incorporate this algorithm using hardware support of VELVET (vectorized processing system for logic verification). Hitachi's latest supercomputer S-820 has been developed using VELVET. The development period has been shortened to 3/4 that of the S-810.<>
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天鹅绒时钟事件抑制算法及其在S-820开发中的应用
介绍了一种用于高速逻辑仿真的时钟事件抑制算法。为了实现该算法,引入了信号值Cn和表示时钟信号当前状态的当前时钟CC。该算法抑制了大约60%的总事件,并减少了40%的CPU时间。使用硬件支持VELVET(用于逻辑验证的矢量化处理系统)合并该算法不需要任何开销。日立最新的超级计算机S-820就是用VELVET开发的。开发周期缩短至S-810.>的3/4
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