INTEGRATING CONCURRENT AND CONSERVATIVE DISTRIBUTED DISCRETE-EVENT SIMULATORS

There have been many attempts to apply parallel computers to discrete- event simulation. These may be divided into two main approaches, distr ibuted simulation and concurrent simulation. Distributed simulation re lies on a spatial decomposition and partitions the simulation model in to components that can be executed on different processors. Concurrent simulation is based on a temporal decomposition. This paper focuses o n the integration of these two approaches; we call our result an integ rated conservative distributed concurrent simulator This is a distribu ted simulator with concurrency added to each model component. To do so , a shared-memory environment was used, and both approaches were unifi ed to an event-centered view. We also partitioned the global concurren t pending-event set of the concurrent simulator and provided each mode l component in the distributed simulator with a local concurrent pendi ng-event set, allowing us to add concurrency to each model component.