Orders-of-magnitude speedup with DEVS representation and high-performance simulation

Research in the use of DEVS (discrete event system specification) based representation of large models on massively parallel platforms is summarized here. We show that parallel DEVS-representation of large scale models can achieve several orders of magnitude speedup. When mapped onto distributed memory multicomputer systems, additional speedup is obtained. An example of a watershed simulation is presented which has been executed in the DEVS-C++/MPI environment working on the CM-5 an IBM SP2 massively parallel systems.