if(comm->get_leaders_comm()==MPI_COMM_NULL){
comm->init_smp();
}
mpi_errno = MPIR_Reduce_two_level_helper_MV2(sendbuf, recvbuf, count,
datatype, op, root, comm);
if(comm->get_leaders_comm()==MPI_COMM_NULL){
comm->init_smp();
}
mpi_errno = MPIR_Reduce_two_level_helper_MV2(sendbuf, recvbuf, count,
datatype, op, root, comm);