Development of parallel applications using DVM-system

DVM-system was designed to create parallel programs of scientific-technical computations in C-DVMH and Fortran-DVMH languages. These languages use the same model of parallel programming (DVMH-model) and are the extensions of standard C and Fortran languages by parallelism specifications, implemented as compiler directives. DVMH-model allows creating efficient parallel programs for heterogeneous computational clusters, the nodes of which use as computing devices not only universal multi-core processors but also can use attached accelerators (GPUs or Intel Xeon Phi coprocessors). This article describes the experience of parallelizing various application programs using DVM-system. The method of incremental or partial parallelization, the system's capabilities for working with unstructured grids, new tools for mapping MPI-programs to multi-core processors and accelerators are considered. The efficiency of parallel DVMH-programs on heterogeneous computing clusters K-10, K-100, Lomonosov and MVS-10P is investigated. The main advantages of DVM-approach for the development of parallel programs are described. The main features of DVM-system tools for performance analysis and functional debugging of parallel programs are presented. The directions for further development of DVM-system are determined.