A processing apparatus, comprising at least a first processing unit and a second processing unit, is proposed. The first processing unit comprises a set of first stateful elements, the second processing unit comprises a set of second stateful elements. A set of synchronization data lines may connect the first stateful elements to the second stateful elements in a pairwise manner. A control unit may control the first processing unit, the second processing unit and the synchronization data lines so as to copy the states of the first stateful elements in parallel via the synchronization data lines to the second stateful elements in response to a synchronization request. A method of synchronizing the processing units is also proposed.
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