From: Daniel Arndt <arndtd@ornl.gov>
Date: Wed, 5 May 2021 19:37:20 +0000 (-0400)
Subject: Fix base/aligned_vector_replicate_03.mpirun=3.release
X-Git-Tag: v9.3.0-rc1~128^2~1
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1c94a4ab97e77d7b1ebb8422b4386780f1f4419a;p=dealii.git

Fix base/aligned_vector_replicate_03.mpirun=3.release
---

diff --git a/include/deal.II/base/aligned_vector.h b/include/deal.II/base/aligned_vector.h
index 96c0199537..6f0eddc8b0 100644
--- a/include/deal.II/base/aligned_vector.h
+++ b/include/deal.II/base/aligned_vector.h
@@ -1553,6 +1553,10 @@ AlignedVector<T>::replicate_across_communicator(const MPI_Comm &   communicator,
   used_elements_end      = elements.get() + array_size;
   allocated_elements_end = used_elements_end;
 
+  // Make sure that the shared memory host has copied the data before we try to
+  // access it.
+  MPI_Barrier(shmem_group_communicator);
+
   // **** Consistency check ****
   // At this point, each process should have a copy of the data.
   // Verify this in some sort of round-about way