Issue No. 10 - October (1983 vol. 32)
A. Pedar , Systems Engineering Division, National Aeronautical Laboratory
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.
shared resources computing system, Architecture optimization, computation reliability, fault-tolerant computing, replicated resources computing system
V. Sarma and A. Pedar, "Architecture Optimization of Aerospace Computing Systems," in IEEE Transactions on Computers, vol. 32, no. , pp. 911-922, 1983.