- mvapich2: use mvapich2 selector for the alltoall operations
- impi: use intel mpi selector for the alltoall operations
- automatic (experimental): use an automatic self-benchmarking algorithm
- mvapich2: use mvapich2 selector for the alltoall operations
- impi: use intel mpi selector for the alltoall operations
- automatic (experimental): use an automatic self-benchmarking algorithm