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This paper discusses the problem of reliable benchmarking of non-blocking MPI communications, both non-blocking point-to-point and non-blocking MPI-3 collective operations. The problem of accurate and practical estimating the level of calculation/communication overlapping (communication hiding efficiency) is discussed. Authors propose the efficiency estimation approach and methodology which is different from previous well-known works. The new IMB-ASYNC benchmark design is proposed. Some practical tests were made on Lomonosov-2 supercomputer using widely used Intel MPI 2017 Update 1 MPI implementation. The results of the tests are discussed, and the future work on IMB-ASYNC testing and development is outlined.

Towards Benchmarking the Asynchronous Progress of Non-Blocking MPI Operations