Open, Closed, and Mixed Networks of Queues with Different Classes of Customers
Journal of the ACM (JACM)
Mean-Value Analysis of Closed Multichain Queuing Networks
Journal of the ACM (JACM)
The Operational Analysis of Queueing Network Models
ACM Computing Surveys (CSUR)
A model of shared DASD and multipathing
Communications of the ACM
Computational algorithms for product form queueing networks
Communications of the ACM
Memory management and response time
Communications of the ACM
Aspects of software design analysis: Concurrency and blocking
PERFORMANCE '80 Proceedings of the 1980 international symposium on Computer performance modelling, measurement and evaluation
On approximate solution techniques for queueing network models of computer systems
On approximate solution techniques for queueing network models of computer systems
The approximate solution of large queueing network models
The approximate solution of large queueing network models
Parameter interdependencies of file placement models in a Unix system
SIGMETRICS '84 Proceedings of the 1984 ACM SIGMETRICS conference on Measurement and modeling of computer systems
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The performance of a computer system depends upon the efficiency of its swapping mechanisms. The swapping efficiency is a complex function of many variables. The degree of multiprogramming, the relative loading on the swapping devices, and the speed of the swapping devices are all interdependent variables that affect swapping performance. In this paper, a model of swapping behavior is given. The interdependencies between the degree of multiprogramming, the swapping devices' loadings, and the swapping devices' speeds are modeled using an iterative scheme. The validation of a model is its predictive capability. The given swapping model was applied to a Univac 1100/42 system to predict the effect of moving the swapping activity from drums to discs. When the swapping activity was actually moved, throughput increased by 20%. The model accurately predicted this improvement. Subtopics discussed include: 1) the modeling of blocked and overlapped disc seek activity, 2) the usefulness of empirical formulae, and 3) the calibration of unmeasurable parameters. Extensions and further applications of the model are given.