+COLL_APPLY(action, COLL_REDUCE_SCATTER_SIG, ompi_ring) COLL_sep \
+COLL_APPLY(action, COLL_REDUCE_SCATTER_SIG, mpich) COLL_sep \
+COLL_APPLY(action, COLL_REDUCE_SCATTER_SIG, mpich_pair) COLL_sep \
+COLL_APPLY(action, COLL_REDUCE_SCATTER_SIG, mpich_rdb) COLL_sep \
+COLL_APPLY(action, COLL_REDUCE_SCATTER_SIG, mpich_noncomm) COLL_sep \
+COLL_APPLY(action, COLL_REDUCE_SCATTER_SIG, automatic)
+
+