- redbcast: reduce then broadcast, using default or tuned algorithms if specified
- ompi_ring_segmented: ring algorithm used by OpenMPI
- mvapich2_rs: rdb for small messages, reduce-scatter then allgather else
- redbcast: reduce then broadcast, using default or tuned algorithms if specified
- ompi_ring_segmented: ring algorithm used by OpenMPI
- mvapich2_rs: rdb for small messages, reduce-scatter then allgather else