MPI_Type_create_struct(3, blks, disps, types, &stype);
MPI_Type_commit(&stype);
err = MPI_Sendrecv((const void *) &foo, 1, stype, 0, 0,
MPI_Type_create_struct(3, blks, disps, types, &stype);
MPI_Type_commit(&stype);
err = MPI_Sendrecv((const void *) &foo, 1, stype, 0, 0,