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A measure of graceful degradation in parallel-computer systems

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1 Author(s)
Cherkassky, V. ; Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN

Gracefully-degrading multiprocessor systems are studied using a multistage interconnection-network-based parallel computer as an example. A measure of graceful degradation, system functionality, is used and analyzed; it is proportional to the number of data-flow paths in a system in the presence of faults. Each path consists of a processor, switches, and a memory. Under this approach, graceful degradation of a multiprocessor system can be evaluated as a combination of individual degradations in each of the processor, memory, and network subsystems. A detailed evaluation of graceful degradation of tightly coupled multiprocessor systems (of large size) based on multistage interconnection networks is given

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Reliability, IEEE Transactions on  (Volume:38 ,  Issue: 1 )