nchilds_max       486 ompi/mca/coll/base/coll_base_topo.c     int nchilds_max = (radix - 1) * log_radix;
nchilds_max       489 ompi/mca/coll/base/coll_base_topo.c     ompi_coll_tree_t *kmtree = malloc(COLL_TREE_SIZE(nchilds_max));