A technique is described for detecting and diagnosing faults at the processor level in a multiprocessor system. In this method, a process is assigned whenever possible to two processors: the processor that it would normally be assigned to (primary) and an additional processor which would otherwise be idle (secondary). Two strategies will be described and analyzed: one which is preemptive and another which is non-preemptive. It is shown that for moderately loaded systems, a sufficient percentage of processes can be performed redundantly using the system's spare capacity to provide a basis for fault detection and diagnosis with virtually no degradation of response time.
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Performance analysis of a fault detection scheme in multiprocessor systems
Dahbura, Anton T.; Sabnani, Krishan K.; Hery, William J.
Follow ACM SIGMETRICS Performance Evaluation Review
, Volume 15 (1)
Association for Computing Machinery – May 1, 1987
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