The Comparison Approach to Multiprocessor Fault Diagnosis
IEEE Transactions on Computers
A comparison connection assignment for diagnosis of multiprocessor systems
ISCA '80 Proceedings of the 7th annual symposium on Computer Architecture
Location of a Faulty Module in a Computing System
IEEE Transactions on Computers
Free performance and fault tolerance (extended abstract): using system idle capacity efficiently
Proceedings of the 1995 ACM SIGMETRICS joint international conference on Measurement and modeling of computer systems
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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.