A Fast Pessimistic Diagnosis Algorithm for Hypercube-Like Networks under the Comparison Model
Liang-Cheng Ye, Jiarong Liang, Hai Xiang Lin · IEEE Transactions on Computers · 2015
Diagnosis by comparison is a realistic approach to detect faults of multiprocessor systems. This paper considers a pessimistic diagnostic strategy for hypercube-like multiprocessor systems under the comparison model. The pessimistic strategy is a diagnostic process whereby all faulty nodes can be correctly identified and at most one fault-free node may be misjudged as a faulty node. We propose a pessimistic diagnosis algorithm based on the largest component in the faulty system. For a system with$N=2^n$nodes and$n\ge 5$, when the number of faulty nodes is bounded by$2n-2$, the algorithm can correctly identify all nodes except at most one node left undiagnosed. The time complexity of the algorithm is$O(Nlog_2N)$.