Method and circuit device for synchronizing redundant processing units

摘要

Method for operation of a redundant system comprising a multiplicity of identical processor boards operating in lockstep mode. According to the method transactions that originate outside the system are processed at the same time by parallel processing units, whether they are synchronously or asynchronously clocked, by use of hardware delay units that serve to delay the processors as necessary until they have all reached the same current transaction. An Independent claim is made for an arrangement for synchronizing processing of external transactions by a processors in a redundant processing system that incorporates hardware delay units assigned to each processor that serve to prevent processing of a transaction until all processors have reached the same stage in program execution.