Accelerating RTL Simulation by Several Orders of Magnitude Using Clock Suppression

In recent years designers of embedded computer systems face a tremendous growth in complexity of their systems. This, together with the fact that the used system clock frequencies rise and that the real time required to see features start up and work correctly in an embedded system also increases, let skyrocket the simulation times of event based simulation engines. Performing these simulations on register transfer level (RTL), however, is crucial to achieve functional verification of embedded computer systems. The acceleration of such event based simulations thus is the aim of the work presented in this paper. To this end a methodology called clock suppression is presented and thoroughly discussed. To underpin the feasibility and performance of this approach, evaluation results of simulation experiments for several designs will be shown