previous_alltoallw_module 136 ompi/mca/coll/hcoll/coll_hcoll.h mca_coll_base_module_t *previous_alltoallw_module; previous_alltoallw_module 75 ompi/mca/coll/hcoll/coll_hcoll_module.c hcoll_module->previous_alltoallw_module = NULL;