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Issue No.05 - May (1972 vol.21)
pp: 446-454
E.G. Mallach , Emulation Department, Honeywell Information Systems Inc.
ABSTRACT
An aerospace guidance computer organization, consisting of multiple processors and memory units attached to a central time-multiplexed data bus, is described. A job mix for this type of computer is obtained by analysis of Apollo mission programs. Multiprocessor performance is then analyzed using: 1) queuing theory, under certain "limiting case" assumptions; 2) Markov process methods; and 3) system simulation. Results of the analyses indicate: 1) Markov process analysis is a useful and efficient predictor of simulation results; 2) efficient job execution is not seriously impaired even when the system is so overloaded that new jobs are inordinately delayed in starting; 3) job scheduling is significant in determining system performance; and 4) a system having many slow processors may or may not perform better than a system of equal power having few fast processors, but will not perform significantly worse.
INDEX TERMS
Aerospace applications, computer system simulation, guidance computers, Markov processes, multiprocessors, queuing theory.
CITATION
E.G. Mallach, "Job-Mix Modeling and System Analysis of an Aerospace Multiprocessor", IEEE Transactions on Computers, vol.21, no. 5, pp. 446-454, May 1972, doi:10.1109/T-C.1972.223540
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