Architecture Optimization of Aerospace Computing Systems

Authors:
A. Pedar;V. V. S. Sarma
Affiliations:
Systems Engineering Division, National Aeronautical Laboratory;-
Venue:
IEEE Transactions on Computers
Year:
1983

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Abstract

Simultaneous consideration of both performance and reliability issues is important in the choice of computer architectures for real-time aerospace applications. One of the requirements for such a fault-tolerant computer system is the characteristic of graceful degradation. A shared and replicated resources computing system represents such an architecture. In this paper, a combinatorial model is used for the evaluation of the instruction execution rate of a degradable, replicated resources computing system such as a modular multiprocessor system. Next, a method is presented to evaluate the computation reliability of such a system utilizing a reliability graph model and the instruction execution rate. Finally, this computation reliability measure, which simultaneously describes both performance and reliability, is applied as a constraint in an architecture optimization model for such computing systems.