REPORT DOCUMENTATION PAGEForm Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503 AGENCY USE ONLY (Leave blank)2. REPORT DATE APRIL 2006 REPORT TYPE AND DATES COVEREDFinal Sep 02 -Sep 04 TITLE AND SUBTITLE JOINT EXPERIMENTATION ON SCALABLE PARALLEL PROCESSORS (JESPP) AUTHOR(S)Dan M. Davis, Robert F. Lucas, Ke-Thia Yao, Gene Wagenbreth FUNDING NUMBERSC -F30602-02-C-0213 PE -N/A PR -JESP TA -PS WU -02 PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)University of Southern California 4647 Admiralty Way Marina Del Rey, California 90292-6695 PERFORMING ORGANIZATION REPORT NUMBERN/A SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)Air 12b. DISTRIBUTION CODE ABSTRACT (Maximum 200 Words)The Joint Experimentation on Scalable Parallel Processors (JESPP) project exemplified the accessibility and the utility of High Performance Computing for large-scale simulations. In order to simulate the future battlespace, the US Joint Forces Command's (USJFCOM) Experimentation Directorate (J9) required expansion of its joint semi-automated forces (JSAF) code capabilities; including number of entities, behavior complexity, terrain resolution, infrastructure features, environmental realism, and analytical potential. The USJFCOM J9 was charged with developing a very large-scale simulation capability of future combat environments, particularly urban areas, with more than one million civilian simulated entities. Synthetic forces have long run in parallel on networked computers. The JESPP strategy exploited the scalable parallel processors (SPPs) of the High Performance Computing Modernization Program (HPCMP). SPPs provide a large number of processors, interconnected with a high performance switch and a collective job management framework. To achieve the goal of simulating one million entities, software routers were developed that replaced multicast with point-to-point transmission of interest-managed packets. This final report lays out that design and development. It also details several experimentation events that have simulated up to one million clutter entities, which were "fought" from Suffolk, VA. NUMBER OF PAGES 105 SUBJECT TERMSLarge scale simulation, semi-automated force simulation, distributed supercomputer, software routers, scalable parallel processor supercomputing List of Figures Executive SummaryThe Joint Experimentation on Scalable Parallel Processors (JESPP) project exemplified the a...