Computer Network Research.
Semiannual technical rept. 1 Jul-31 Dec 75,
CALIFORNIA UNIV LOS ANGELES SCHOOL OF ENGINEERING AND APPLIED SCIENCE
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Queueing network models are used for performance studies of computer systems. The basic model under consideration is a closed network representing N terminal users competing for the use of a set of processing resources. With the assumption that all users are statistically identical, asymptotic expressions are derived for performance measures such as resource utilization and mean response time when N is large. These expressions characterize the behavior of the system as N increases. They have the important advantages that 1 they are simple functions of the model parameters, and 2 they apply to models that do not yield to exact analysis. For the basic model, formal definitions are also given to terms like limiting resource, system saturation, and system balance. A limited memory model is then used to study the effect of memory limitations on the asymptotic properties of resource utilization and mean response time.
- Computer Hardware
- Computer Systems