han: explicitly exclude sm/tuned when splitting communicator for tune…

…d/sm
wenduwan · Jul 14, 2023 · 0d10025 · 0d10025
1 parent 5403341
commit 0d10025
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/ompi/mca/coll/han/coll_han_subcomms.c b/ompi/mca/coll/han/coll_han_subcomms.c
@@ -276,10 +276,10 @@ int mca_coll_han_comm_create(struct ompi_communicator_t *comm,
     OBJ_CONSTRUCT(&comm_info, opal_info_t);
 
     /*
-     * Upgrade sm module priority to set up low_comms[0] with sm module
+     * Upgrade tuned module priority to set up low_comms[0] with tuned module
      * This sub-communicator contains the ranks that share my node.
      */
-    opal_info_set(&comm_info, "ompi_comm_coll_preference", "tuned,^han");
+    opal_info_set(&comm_info, "ompi_comm_coll_preference", "tuned,^han,^sm");
     ompi_comm_split_type(comm, MPI_COMM_TYPE_SHARED, 0,
                          &comm_info, &(low_comms[0]));
 
@@ -290,10 +290,10 @@ int mca_coll_han_comm_create(struct ompi_communicator_t *comm,
     low_rank = ompi_comm_rank(low_comms[0]);
 
     /*
-     * Upgrade shared module priority to set up low_comms[1] with shared module
+     * Upgrade sm module priority to set up low_comms[1] with sm module
      * This sub-communicator contains the ranks that share my node.
      */
-    opal_info_set(&comm_info, "ompi_comm_coll_preference", "sm,^han");
+    opal_info_set(&comm_info, "ompi_comm_coll_preference", "sm,^han,^tuned");
     ompi_comm_split_type(comm, MPI_COMM_TYPE_SHARED, 0,
                          &comm_info, &(low_comms[1]));