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Architecture Optimization of Aerospace Computing Systems

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2 Author(s)
Pedar, A. ; Systems Engineering Division, National Aeronautical Laboratory ; Sarma, V.V.S.

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.

Published in:

Computers, IEEE Transactions on  (Volume:C-32 ,  Issue: 10 )