Linking simulation model specification and parallel execution through UNITY

Presents the results of an attempt to bridge the gap between the requirements and philosophy of parallel programming (attention being focused on crucial efficiency-related implementation details) and the requirements and philosophy of a simulation model specification (attention being focused on correctly and simply describing the model behavior). K.M. Chandry and J. Misra´s (1988) UNITY system is found to offer (or be amenable to) many of the features required to bridge this gap. UNITY can handle both a state-transition-based specification, which is a conventional parallel simulation program, and a data-flow-based specification. For the G/G/1 problem, the data-flow view leads to a more efficient solution