An extension of SHMEM library with original synchronization schemes and active messages is considered. The new library is called SHMEM+. The basic SHMEM library and the programming style imposed by it are described. The modification details of the OpenMP NPB UA benchmark version for the SHMEM and SHMEM+ libraries implemented by the author for the Blue Gene/P and Lomonosov supercomputers are discussed.

Keywords: NPB UA benchmark, PGAS paradigm, SHMEM, unstructured adaptive, OpenMP extension, Lomonosov supercomputer, Blue Gene/P, active messages, parallel programming

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