MPI_Reduce_scatter_block 41 ompi/mpi/c/reduce_scatter_block.c #define MPI_Reduce_scatter_block PMPI_Reduce_scatter_block MPI_Reduce_scatter_block 47 ompi/mpi/c/reduce_scatter_block.c int MPI_Reduce_scatter_block(const void *sendbuf, void *recvbuf, int recvcount,