From f05a1e81b8b740d299ae76b360f5e5630750d04b Mon Sep 17 00:00:00 2001
From: Martin Kronbichler <martin.kronbichler@uni-a.de>
Date: Thu, 19 May 2022 22:37:50 +0200
Subject: [PATCH] Improve robustness of two tests

---
 tests/matrix_free/parallel_multigrid_interleave.cc    | 11 ++++++++++-
 .../parallel_multigrid_interleave_renumber.cc         | 11 ++++++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/tests/matrix_free/parallel_multigrid_interleave.cc b/tests/matrix_free/parallel_multigrid_interleave.cc
index c189eff703..dc2e5b651a 100644
--- a/tests/matrix_free/parallel_multigrid_interleave.cc
+++ b/tests/matrix_free/parallel_multigrid_interleave.cc
@@ -60,7 +60,8 @@ public:
     : n_calls_vmult(0)
   {}
 
-  ~LaplaceOperator()
+  void
+  print_n_calls_special()
   {
     // round number of calls to make test more robust
     if (n_calls_vmult > 0)
@@ -430,6 +431,14 @@ do_test(const DoFHandler<dim> &dof)
     SolverCG<LinearAlgebra::distributed::Vector<double>> solver(control);
     solver.solve(fine_matrix, sol, in, preconditioner);
   }
+
+  // Print statistics
+  for (unsigned int level = 0;
+       level < dof.get_triangulation().n_global_levels();
+       ++level)
+    mg_matrices[level].print_n_calls_special();
+
+  fine_matrix.print_n_calls_special();
 }
 
 
diff --git a/tests/matrix_free/parallel_multigrid_interleave_renumber.cc b/tests/matrix_free/parallel_multigrid_interleave_renumber.cc
index 9084cd849e..9e5c95d9c2 100644
--- a/tests/matrix_free/parallel_multigrid_interleave_renumber.cc
+++ b/tests/matrix_free/parallel_multigrid_interleave_renumber.cc
@@ -61,7 +61,8 @@ public:
     : n_calls_vmult(0)
   {}
 
-  ~LaplaceOperator()
+  void
+  print_n_calls_special()
   {
     // round number of calls to make test more robust
     if (n_calls_vmult > 0)
@@ -471,6 +472,14 @@ do_test(DoFHandler<dim> &dof)
     SolverCG<LinearAlgebra::distributed::Vector<double>> solver(control);
     solver.solve(fine_matrix, sol, in, preconditioner);
   }
+
+  // Print statistics
+  for (unsigned int level = 0;
+       level < dof.get_triangulation().n_global_levels();
+       ++level)
+    mg_matrices[level].print_n_calls_special();
+
+  fine_matrix.print_n_calls_special();
 }
 
 
-- 
2.39.5