+COLL_APPLY(action, COLL_ALLTOALLV_SIG, pair) COLL_sep \
+COLL_APPLY(action, COLL_ALLTOALLV_SIG, pair_light_barrier) COLL_sep \
+COLL_APPLY(action, COLL_ALLTOALLV_SIG, pair_mpi_barrier) COLL_sep \
+COLL_APPLY(action, COLL_ALLTOALLV_SIG, pair_one_barrier) COLL_sep \