parallel processing - Scattered indices in MPI -


i'm trying divide array between processors such each 1 takes points different parts in array. example, if

a = {1, 2, 3, 4, 5, 6, 7, 8}

and i'm using 2 processors, want p1 handle {1, 3, 5, 7}, , p2 handle {2, 4, 6, 8}.

when scaling large numbers of points (millions) , processors (128), tricky. in previous versions of function, gave p1 first chunk of points, p2 next chunk, , on (which easy mpi_gatherv).

is there way use mpi_gatherv make work, or way use mpi_send , mpi_receive achieve it? trouble mpi_gatherv while can specify indices processors send to, still puts of p1 before p2 before p3 etc.


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