Abstract
Most previous work on fault-tolerant (FT) multiprocessor design has concentrated on deterministic k-fault-tolerant (k-FT) designs in which exactly k spare processors and some spare switches and links are added to construct multiprocessors that can tolerate any k processor faults. However, after k faults are reconfigured around, much of the extra links and switches can remain unutilized. We show how to use the node-covering principle of Dutt and Hayes (1992) and error correcting codes in order to construct probabilistic designs with very high average fault tolerance but low wiring and switch overhead. This design methodology is applicable to any multiprocessor interconnection topology. We also obtain the deterministic fault tolerance for these designs and develop efficient layout strategies for them. >
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