Access Restriction

Author Coffman, E. G.
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Copyright Year ©1969
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Abstract Properly scheduling the usage of input output devices is an important aspect of the design of modern multiprogramming systems featuring a paged environment. In this paper magnetic drums in the role of auxiliary memories are studied in the context of these systems. It is the nature of the drum, its usage by the system, and the organization of information on the drum are discussed in the light of current system designs. Mathematical models are then defined such that two extremes in scheduling disciplines are represented in a system in which page requests are assumed to arrive singly and at random. The analysis leads to results for a measure of drum utilization, a generating function for the queue length probabilities in equilibrium, the mean queue length, and the mean waiting time. Finally, the significance of the results is discussed along with some examples.
ISSN 00045411
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1969-01-01
Publisher Place New York
e-ISSN 1557735X
Journal Journal of the ACM (JACM)
Volume Number 16
Issue Number 1
Page Count 18
Starting Page 73
Ending Page 90

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Source: ACM Digital Library