Simulation of dispatching algorithms in a multiprogramming environment

  • Authors:
  • N. S. Losapio;William G. Bulgren

  • Affiliations:
  • -;-

  • Venue:
  • ACM '72 Proceedings of the ACM annual conference - Volume 2
  • Year:
  • 1972

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Abstract

CPU scheduling or dispatching in computer systems is surveyed. In order to study and evaluate a dispatching algorithm, a simulation model of a dispatching algorithm for multiprogramming operating system has been devised and programmed. Essential elements which have been included are the job environment, the computer system environment, and the user environment. The model is patterned basically after GECOS III, on the H-600 line computer. Some results of the investigation are presented, such as lengths of various queues, I/O time, processor utilization, expected time in various queues, throughput and flexibility.