Abstract:

The optimistic time synchronization mechanism can dramatically improve the parallel simulation performance,but the optimistic time advancement will lead to causality error,which needsthe event rollback according to the saved state,therefore the state saving mechanism is an important factor impactingthe optimistic time advancement performance.In this paper,we first introduce the logic process execution procedure of the parallel simulation and discuss the state saving and event rollback mechanism for the optimistic time advancement;then we model and theoretically analyze the copy state saving technique,and test its performance through experiment tovalidatethe correctness of our theoretical analysis.

Key words: parallel simulation;rollback mechanism;copy state saving;performance analysis