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Performance evaluation of computer systems in terms of time delay, throughput, and throughput per unit of cost : single processor system, multiple processor network system, and uniprocessor with time sharing capacity Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_projects/br86bc01s

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  • The information processing industry is one of the fastest growing, and most dynamic industries on the scientific as well as business scene, today. Progress in designing and applying computing systems has out raced progress in evaluating their performance. In order to circumvent this trend, there should be a simultaneous development of guidelines for measuring the perfor­mance of a computing system. These guidelines are called measures of performance. The two basic measures of performance are turnaround time (time delay), and throughput. Turnaround time is defined as the delay between the presentation of input to a system and the receipt of output from it. Through­put is defined as the steady state work capacity of the system. Both through­put and turnaround time depend on internal CPU speed, and each is dependent on the other. It is often possible to increase throughput at the expense of turnaround time or to decrease turnaround time at the expense of throughput. From these two basic measures of performance stem another measure of perfor­mance called throughput per unit of cost. Throughput per unit of cost is found by dividing the throughput by the cost of the system. This paper chooses three types of systems and evaluates their performance in terms of turnaround time (time delay), throughput, and throughput per unit of cost. The three types of systems are single processor system (SP), multiple processor network system (MPN), and uniprocessor with time sharing capacity (UPTS). The significance of choosing these three systems is to study the improve­ment of time delay and throughput in a multiple processor network system and uniprocessor system with time sharing capacity over single processor centralized system. Queuing Theory techniques are used to determine time delay and through­put. The single processor system is modelled in terms of M/M/1. Multiple server network system is modelled in terms of M/M/K queuing discipline. Uniprocessor system with time sharing capacity is modelled in terms of Round-Robin queuing discipline. At the end a cost function equation is developed for each system and throughput per unit of cost is determined for MPN and UPTS.
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