Bcast Hierarchical Functions #6620
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Pull Request Description
Implemented bcast_intra_hierarchical which currently operates the same as bcast_intra_smp. subgroup versions for bcast_intra_binomial_tree and bcast_intra_scatter_ring_allgather were added which take in an array of ranks and bcasts across those ranks. Added MPII_Scatter_for_bcast_group in bcast_utils.c which functions the same way as MPII_Scatter_for_bcast except it is for subgroups. Added find_local_rank_linear function which is used in subgroup bcast functions to map a rank to its local rank within the subgroup.