Wait for communication to finish.

dealii · Jun 16, 2023 · 139257d · 139257d
1 parent 1f266e5
commit 139257d
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/source/grid/grid_tools.cc b/source/grid/grid_tools.cc
@@ -3665,6 +3665,11 @@ namespace GridTools
         AssertThrowMPI(ierr);
       }
 
+    // At this point, wait for all of the isend operations to finish:
+    MPI_Waitall(first_requests.size(),
+                first_requests.data(),
+                MPI_STATUSES_IGNORE);
+
 
     // Send second message
     std::vector<std::vector<char>> cellids_send_buffers(
@@ -3775,6 +3780,12 @@ namespace GridTools
       }
 #endif
 
+    // At this point, wait for all of the isend operations of the second round
+    // to finish:
+    MPI_Waitall(second_requests.size(),
+                second_requests.data(),
+                MPI_STATUSES_IGNORE);
+
     return local_to_global_vertex_index;
   }