A SIMULATION TESTBED BASED ON LIGHTWEIGHT PROCESSES

The Si lightweight-process based system for simulating process interac tions is an enhancement to the C programming language in the form of l ibrary primitives with sets of predefined data structures. The Si syst em encapsulates an existing lightweight-process library to provide a d iscrete-event simulation environment supporting the process view. It w as developed as a research testbed for investigating methods which sup port simulations efficiently. Easy extensions and modifications to the Si system are a major design objective, accomplished through modulari ty and layering. This paper describes the system, our experiences with its implementation, and its applicability to simulation modeling. We report on performance measurements of different implementations of the simulation scheduler, and of different algorithms for simulating serv ice disciplines.