coll_allreduce_init_module  702 ompi/mca/coll/coll.h     mca_coll_base_module_2_3_0_t *coll_allreduce_init_module;
coll_allreduce_init_module  120 ompi/mpiext/pcollreq/c/allreduce_init.c                                             op, comm, info, request, comm->c_coll->coll_allreduce_init_module);