child_vrank       610 ompi/mca/coll/portals4/coll_portals4_gather.c         int child_vrank = VRANK(bmtree->tree_next[i], request->u.gather.root_rank, request->u.gather.size);
child_vrank       611 ompi/mca/coll/portals4/coll_portals4_gather.c         int sub_tree_size = get_tree_numdescendants_of(comm, child_vrank) + 1;