コンピュータ・システム性能評価シミューレータPACSS

概要

論文の詳細を見る
This paper presents a model of computer systems, called CS model, and proposes a simulator based on this model for evaluating perfomance of computer systems,named PACSS (Program And Computer System Simulator). It is shown that the action of a computer system can be modelled by mutual actions of message transactions,process transactions, activators and resources in, the CS model. Also, user behaviours, user program characteristics and the operating system function of the systemi can respectively be represented by job generations, job processes and an activity block network of the CS model. It is presented that the job generations and job processes are represented in Markov chains of command sequences and those of SVC sequences respectively. The activity block network can be described with twentyfive standard activity blocks provided by PACSS.It is also shown that PACSS can produce detailed and flexible statistics on cpu utilizations, other resource utilizations, response times, queues and other variables of the models. In addition, the structure and simulation mechanism of PACSS are briefly described. Finally, discussions on advantageous features of PACSS are given in comparison with functions of GPSS.
一般社団法人情報処理学会の論文
1971-01-15