A multiprocessor computer system which provides fault tolerance includes a number of processing sets. At least one of the processing sets is operable asynchronously of a second processing set. A monitor is connected to receive I/O operations output from the processing sets for identifying faulty operation...http://www.google.de/patents/US7155704?utm_source=gb-gplus-sharePatent US7155704 - Determinism in a multiprocessor computer system and monitor and processor therefor
