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<p>An improved implementation of clock synchronization of multiprocessor systems in the presence of malicious faults is proposed. The proposed hardware implementation for the reference clock selection has a lower gate complexity, smaller time delay, and greater flexibility than the previously published implementation. The improvement is achieved by replacing the sorter with a counting encoder and comparators and by introducing threshold generation logic with programmable registers. The scheme has a gate complexity of O(n) and a delay of O(log n), where n is the total number of inputs to a particular clock, and is programmable for different values of n and m, the maximum number of faults.</p>
fault-tolerant clock synchronization algorithm; large multiprocessor systems; malicious faults; reference clock selection; lower gate complexity; smaller time delay; sorter; counting encoder; threshold generation logic; programmable registers; gate complexity; fault tolerant computing; multiprocessing systems; synchronisation.

B. Choi, M. Kim and K. Park, "An Improved Hardware Implementation of the Fault-Tolerant Clock Synchronization Algorithm for Large Multiprocessor Systems," in IEEE Transactions on Computers, vol. 39, no. , pp. 404-407, 1990.
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