The report presents a comprehensive set of hierarchically organized modular analytical models developed for the performance evaluation of multiprogrammed virtual-memory time-shared computer systems using demand paging. The hierarchy of models contains a user behavior model, a secondary memory model, a program behavior model, a processor model, and a total system model. This thesis is particularly concerned with the last three models. The program behavior model developed in this thesis permits one to estimate the frequency of paging expected on a given processing system. The processor model enables one to evaluate the throughput of a given multi-processor multi-memory processing system under multiprogramming. Finally, the total system model allows us to derive the response time distribution of an entire computer system under study. The report includes two PL/I programs. (Author).

Performance evaluation is not just determining whether or not a system meets certain objectives; it is also understanding if and how system performance can be improved. A computer system analyst must master a number of techniques to ascertain important factors and their effect on system performance. The purpose of this book is to develop a better understanding of the problem of performance evaluation and to analyze available techniques within this concept. Directed to present and future computer analysts and designers, readers should be familiar with concepts of hardware organization, system architecture, and operating systems.

These proceedings consist of papers presented at the International Workshop organized by the Commission of the European Communities, Joint Research Centre, Ispra Establishment, Department A, in Ispra (Varese) Italy, October 4-6, 1976. Topics addressed in this conference include probabilistic modeling of computer systems, analysis of schedules of computations and tasks, queueing networks, and simulation models. Applications include program behavior measurements and models, scheduling of multiprocessor systems, and reliable processing in the presence of system failures.