From: Martin Kronbichler <kronbichler@lnm.mw.tum.de>
Date: Thu, 17 Aug 2017 15:20:26 +0000 (+0200)
Subject: Fix tensor product matrix test case in float mode.
X-Git-Tag: v9.0.0-rc1~1222^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6dbc23076bfd2b0c24470ca1cc4921d5951fd720;p=dealii.git

Fix tensor product matrix test case in float mode.
---

diff --git a/tests/lac/tensor_product_matrix_03.cc b/tests/lac/tensor_product_matrix_03.cc
index 3967ffc812..61056a97d0 100644
--- a/tests/lac/tensor_product_matrix_03.cc
+++ b/tests/lac/tensor_product_matrix_03.cc
@@ -51,7 +51,11 @@ void do_test()
   mat.vmult(v2, v1);
   mat.apply_inverse(v3, v2);
   v3 -= v1;
-  deallog << "Verification of vmult and inverse: " << (double)v3.linfty_norm() << std::endl;
+  // add tolerance to account for different BLAS/LAPACK combinations. Float is
+  // too inaccurate so numdiff does not work...
+  double norm = v3.linfty_norm();
+  deallog << "Verification of vmult and inverse: "
+          << (norm < 1e-3 ? 0. : norm)  << std::endl;
 
   FullMatrix<float> full(v1.size(), v1.size());
   for (unsigned int i=0, c=0; i<(dim>2?size:1); ++i)
@@ -69,13 +73,16 @@ void do_test()
                              + laplace(i,ii)*mass(j,jj)*mass(k,kk);
   full.vmult(v3, v1);
   v3 -= v2;
-  deallog << "Verifiction of vmult: " << (double)v3.linfty_norm() << std::endl;
+
+  norm = v3.linfty_norm();
+  deallog << "Verifiction of vmult: " << (norm < 1e-4 ? 0. : norm) << std::endl;
 
   full.gauss_jordan();
   full.vmult(v3, v1);
   mat.apply_inverse(v2, v1);
   v3 -= v2;
-  deallog << "Verification of inverse: " << (double)v3.linfty_norm() << std::endl;
+  norm = v3.linfty_norm();
+  deallog << "Verification of inverse: " << (norm < 5e-3 ? 0. : norm) << std::endl;
 }
 
 
diff --git a/tests/lac/tensor_product_matrix_03.with_lapack=true.output b/tests/lac/tensor_product_matrix_03.with_lapack=true.output
index 4c0d769fc7..2fc78058b3 100644
--- a/tests/lac/tensor_product_matrix_03.with_lapack=true.output
+++ b/tests/lac/tensor_product_matrix_03.with_lapack=true.output
@@ -1,45 +1,45 @@
 
 DEAL::Testing dim=1, degree=1
-DEAL::Verification of vmult and inverse: 1.19209e-07
+DEAL::Verification of vmult and inverse: 0.00000
 DEAL::Verifiction of vmult: 0.00000
-DEAL::Verification of inverse: 5.96046e-08
+DEAL::Verification of inverse: 0.00000
 DEAL::Testing dim=1, degree=2
-DEAL::Verification of vmult and inverse: 1.19209e-07
+DEAL::Verification of vmult and inverse: 0.00000
 DEAL::Verifiction of vmult: 0.00000
-DEAL::Verification of inverse: 2.38419e-07
+DEAL::Verification of inverse: 0.00000
 DEAL::Testing dim=1, degree=5
-DEAL::Verification of vmult and inverse: 9.53674e-06
+DEAL::Verification of vmult and inverse: 0.00000
 DEAL::Verifiction of vmult: 0.00000
-DEAL::Verification of inverse: 4.19617e-05
+DEAL::Verification of inverse: 0.00000
 DEAL::Testing dim=2, degree=1
-DEAL::Verification of vmult and inverse: 2.38419e-07
+DEAL::Verification of vmult and inverse: 0.00000
 DEAL::Verifiction of vmult: 0.00000
-DEAL::Verification of inverse: 1.19209e-07
+DEAL::Verification of inverse: 0.00000
 DEAL::Testing dim=2, degree=2
-DEAL::Verification of vmult and inverse: 9.53674e-07
-DEAL::Verifiction of vmult: 1.90735e-06
-DEAL::Verification of inverse: 3.57628e-07
+DEAL::Verification of vmult and inverse: 0.00000
+DEAL::Verifiction of vmult: 0.00000
+DEAL::Verification of inverse: 0.00000
 DEAL::Testing dim=2, degree=5
-DEAL::Verification of vmult and inverse: 2.47955e-05
-DEAL::Verifiction of vmult: 3.81470e-06
-DEAL::Verification of inverse: 5.14984e-05
+DEAL::Verification of vmult and inverse: 0.00000
+DEAL::Verifiction of vmult: 0.00000
+DEAL::Verification of inverse: 0.00000
 DEAL::Testing dim=2, degree=11
-DEAL::Verification of vmult and inverse: 7.67708e-05
-DEAL::Verifiction of vmult: 5.72205e-06
-DEAL::Verification of inverse: 0.000236511
+DEAL::Verification of vmult and inverse: 0.00000
+DEAL::Verifiction of vmult: 0.00000
+DEAL::Verification of inverse: 0.00000
 DEAL::Testing dim=3, degree=1
-DEAL::Verification of vmult and inverse: 2.38419e-07
+DEAL::Verification of vmult and inverse: 0.00000
 DEAL::Verifiction of vmult: 0.00000
-DEAL::Verification of inverse: 8.94070e-08
+DEAL::Verification of inverse: 0.00000
 DEAL::Testing dim=3, degree=2
-DEAL::Verification of vmult and inverse: 1.90735e-06
-DEAL::Verifiction of vmult: 3.81470e-06
-DEAL::Verification of inverse: 9.53674e-07
+DEAL::Verification of vmult and inverse: 0.00000
+DEAL::Verifiction of vmult: 0.00000
+DEAL::Verification of inverse: 0.00000
 DEAL::Testing dim=3, degree=3
-DEAL::Verification of vmult and inverse: 1.71661e-05
-DEAL::Verifiction of vmult: 1.14441e-05
-DEAL::Verification of inverse: 1.04904e-05
+DEAL::Verification of vmult and inverse: 0.00000
+DEAL::Verifiction of vmult: 0.00000
+DEAL::Verification of inverse: 0.00000
 DEAL::Testing dim=3, degree=7
-DEAL::Verification of vmult and inverse: 0.000104904
-DEAL::Verifiction of vmult: 1.14441e-05
-DEAL::Verification of inverse: 0.000228882
+DEAL::Verification of vmult and inverse: 0.00000
+DEAL::Verifiction of vmult: 0.00000
+DEAL::Verification of inverse: 0.00000