From: Martin Kronbichler <kronbichler@lnm.mw.tum.de>
Date: Mon, 5 Oct 2020 07:44:27 +0000 (+0200)
Subject: Disable compression in MPI::some_to_some
X-Git-Tag: v9.3.0-rc1~1036^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F11001%2Fhead;p=dealii.git

Disable compression in MPI::some_to_some
---

diff --git a/include/deal.II/base/mpi.h b/include/deal.II/base/mpi.h
index dd886eecf7..19ae43725f 100644
--- a/include/deal.II/base/mpi.h
+++ b/include/deal.II/base/mpi.h
@@ -1160,7 +1160,8 @@ namespace Utilities
           if (rank_obj.first != my_proc)
             {
               const auto &rank   = rank_obj.first;
-              buffers_to_send[i] = Utilities::pack(rank_obj.second);
+              buffers_to_send[i] = Utilities::pack(rank_obj.second,
+                                                   /*allow_compression=*/false);
               const int ierr     = MPI_Isend(buffers_to_send[i].data(),
                                          buffers_to_send[i].size(),
                                          MPI_CHAR,
@@ -1205,7 +1206,9 @@ namespace Utilities
             Assert(received_objects.find(rank) == received_objects.end(),
                    ExcInternalError(
                      "I should not receive again from this rank"));
-            received_objects[rank] = Utilities::unpack<T>(buffer);
+            received_objects[rank] =
+              Utilities::unpack<T>(buffer,
+                                   /*allow_compression=*/false);
           }
       }