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An abstract of the thesis of Andreas Bernhard Georg Eberhart for the Master of Science in Computer Science presented May 10, 1996. Title: Contention-Free Scheduling of Communication Induced by Array Operations on 2D Meshes Whole array operations and array section operations are important features of many data-parallel languages. Efficient implementation of these operations on distributed-memory multicomputers is critical to the scalability and high-performance of data-parallel programs. This thesis presents an approach for analyzing communication patterns induced by array operations and for using run-time information to schedule the message flow. The distributed, dynamic scheduling algorithms guarantee link-contention-free data transfer and utilize network resources almost optimally. They incur little overhead, which is important in order not to reduce the speedup gained by the parallel execution. The algorithms can be used by compilers for the generation of efficient code for array operations. Implemented in a runtime library, they can derive a schedule depending on parameters passed by the parallel application. Simulation results demonstrate the algorithms' superiority to the asynchronous transfer mode that is commonly used for this type of communication. CONTENTION-FREE SCHEDULING OF COMMUNICATION INDUCED BY ARRAY OPERATIONS ON 2D MESHES by ANDREAS BERNHARD GEORG EBERHART A thesis submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE 1n COMPUTERSCIBNCE Portland State University 1996

Contention-free Scheduling of Communication Induced by Array Operations on 2D Meshes