This paper describes the Aggregate Remote Memory Copy Interface (ARMCI), a portable high performance remote memory access communication interface, developed originally under the U.S. Department of Energy (DOE) Advanced Computational Testing and Simulation Toolkit project and currently used and advanced as a part of the run-time layer of the DOE project, Programming Models for Scalable Parallel Computing. The paper discusses the model, addresses challenges of portable implementations, and

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... rates that ARMCI delivers high performance on a variety of platforms. Special emphasis is placed on the latency hiding mechanisms and ability to optimize noncontiguous data transfers.