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Published October 1978 | public
Journal Article

Models for parallel processing within programs: application to CPU: I/O and I/O: I/O overlap

Abstract

Approximate queueing models for internal parallel processing by individual programs in a multiprogrammed system are developed in this paper. The solution technique is developed by network decomposition. The models are formulated in terms of CPU:I/O and I/O:I/O overlap and applied to the analysis of these problems. The percentage performance improvement from CPU:I/O overlap is found to be greatest for systems which are in approximate CPU:I/O utilization balance and for low degrees of multiprogramming. The percentage improvement from I/O:I/O overlap is found to be greatest for systems in which the I/O system is more utilized than the CPU.

Additional Information

© 1978 ACM. Received January 1977; revised January 1978.

Additional details

Created:
August 19, 2023
Modified:
October 20, 2023