A distributed software runtime environment to support testbed experimentation using ADL/ADS

ADL/ADS is a testbed user interface tool for experimentation with critical research and design issues associated with distributed processing. One significant class of problems well-suited for investigation in a testbed are data engineering concepts. ADL/ADS provides a graphics interface for expressing a candidate distributed architecture at the Processor-Memory-Switch (PMS) level of hardware detail and the task-message-file level of software detail. Then the ADL/ADS support software is used to construct an existing model of the described architecture and to execute and monitor the model on the testbed. The testbed software runtime environment to support the execution of the model is described in this paper.