int nary_tree_bcast(void *buf, int count, MPI_Datatype datatype, int root, MPI_Comm comm,int arity);
int nary_tree_barrier( MPI_Comm comm, int arity );
+int smpi_coll_tuned_alltoall_bruck(void *sbuf, int scount, MPI_Datatype sdtype,
+ void* rbuf, int rcount, MPI_Datatype rdtype,
+ MPI_Comm comm);
+
+int smpi_coll_tuned_alltoall_pairwise (void *sendbuf, int sendcount, MPI_Datatype datatype,
+ void* recvbuf, int recvcount, MPI_Datatype recvdatatype,
+ MPI_Comm comm);
+