Efficient Communications in Parallel Loop Distribution

International audienceIn this paper, we present original techniques for the generation and the efficient execution of communication code for parallel loop nests, in the framework of the compilation of HPFf-like languages on distributed memory parallel computers. The problem is studied through its two components: on one hand, the generation of a fast description of communication sets by the compiler and, on the other hand, the implementation of efficient transfers at run-time. Both take into account the characteristics of the distributed array management, notably the memory contiguity