From: Daniel Arndt <arndtd@ornl.gov>
Date: Wed, 28 Dec 2022 21:43:50 +0000 (+0100)
Subject: Don't initialize Views
X-Git-Tag: v9.5.0-rc1~697^2~12
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ebf370595254ffb6b21d92bf5bfac0e97b2a6c2b;p=dealii.git

Don't initialize Views
---

diff --git a/include/deal.II/lac/la_parallel_vector.templates.h b/include/deal.II/lac/la_parallel_vector.templates.h
index f5ec0ad5ff..756b2d92b8 100644
--- a/include/deal.II/lac/la_parallel_vector.templates.h
+++ b/include/deal.II/lac/la_parallel_vector.templates.h
@@ -385,8 +385,9 @@ namespace LinearAlgebra
           const IndexSet &                  v_stored = V.get_stored_elements();
           const size_type                   n_elements = v_stored.n_elements();
           Kokkos::DefaultHostExecutionSpace host_exec;
-          Kokkos::View<size_type *, Kokkos::HostSpace> indices("indices",
-                                                               n_elements);
+          Kokkos::View<size_type *, Kokkos::HostSpace> indices(
+            Kokkos::view_alloc(Kokkos::WithoutInitializing, "indices"),
+            n_elements);
           Kokkos::parallel_for(
             "import_elements: fill indices",
             Kokkos::RangePolicy<Kokkos::DefaultHostExecutionSpace>(host_exec,
@@ -400,11 +401,8 @@ namespace LinearAlgebra
 
           // Move the indices to the device
           ::dealii::MemorySpace::Default::kokkos_space::execution_space exec;
-          Kokkos::View<size_type *,
-                       ::dealii::MemorySpace::Default::kokkos_space>
-            indices_dev("indices_dev", n_elements);
-          Kokkos::deep_copy(exec, indices_dev, indices);
-          exec.fence();
+          auto indices_dev = Kokkos::create_mirror_view_and_copy(
+            ::dealii::MemorySpace::Default::kokkos_space{}, indices);
 
           // Move the data to the device
           Kokkos::View<Number *, ::dealii::MemorySpace::Default::kokkos_space>