From: Vladimir Yushutin <vyushut@clemson.edu>
Date: Mon, 3 Jun 2024 16:32:07 +0000 (-0400)
Subject: The regression test shows that step-9 converges in 1046 (not the expected 1049) itera... 
X-Git-Tag: v9.6.0-rc1~212^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F17099%2Fhead;p=dealii.git

The regression test shows that step-9 converges in 1046 (not the expected 1049) iterations for the refinement level 5. The method check_solver_within_range is used now with the 335 (corresponds to refinement level 1) to the 1050 range of accepted results.
---

diff --git a/tests/examples/step-9.diff b/tests/examples/step-9.diff
index 9d35d72c6c..4f4c15a979 100644
--- a/tests/examples/step-9.diff
+++ b/tests/examples/step-9.diff
@@ -1,8 +1,28 @@
-850c850
+49a49
+> #include "../example_test.h"
+762c762,766
+<     solver.solve(system_matrix, solution, system_rhs, preconditioner);
+---
+>     check_solver_within_range(std::cout,
+> 			   solver.solve(system_matrix, solution, system_rhs, preconditioner),
+> 			   solver_control.last_step(),
+> 			   335,
+> 			   1050);
+766,769c770,773
+<     std::cout << "   Iterations required for convergence: "
+<               << solver_control.last_step() << '\n'
+<               << "   Norm of residual at convergence:     "
+<               << solver_control.last_value() << '\n';
+---
+>     //std::cout << "   Iterations required for convergence: "
+>     //          << solver_control.last_step() << '\n'
+>     //          << "   Norm of residual at convergence:     "
+>     //          << solver_control.last_value() << '\n';
+850c854
 <     for (unsigned int cycle = 0; cycle < 10; ++cycle)
 ---
 >     for (unsigned int cycle = 0; cycle < 5; ++cycle)
-875c875
+875c879
 <         output_results(cycle);
 ---
 >       //output_results(cycle);
diff --git a/tests/examples/step-9.output b/tests/examples/step-9.output
index 88a8d98f9b..7e36a62fba 100644
--- a/tests/examples/step-9.output
+++ b/tests/examples/step-9.output
@@ -1,25 +1,20 @@
 Cycle 0:
    Number of active cells:              64
    Number of degrees of freedom:        1681
-   Iterations required for convergence: 338
-   Norm of residual at convergence:     2.91757e-11
+Solver stopped within 335 - 1050 iterations
 Cycle 1:
    Number of active cells:              121
    Number of degrees of freedom:        3436
-   Iterations required for convergence: 448
-   Norm of residual at convergence:     2.40051e-11
+Solver stopped within 335 - 1050 iterations
 Cycle 2:
    Number of active cells:              238
    Number of degrees of freedom:        6487
-   Iterations required for convergence: 535
-   Norm of residual at convergence:     2.06943e-11
+Solver stopped within 335 - 1050 iterations
 Cycle 3:
    Number of active cells:              481
    Number of degrees of freedom:        13510
-   Iterations required for convergence: 669
-   Norm of residual at convergence:     1.39588e-11
+Solver stopped within 335 - 1050 iterations
 Cycle 4:
    Number of active cells:              958
    Number of degrees of freedom:        26137
-   Iterations required for convergence: 1049
-   Norm of residual at convergence:     1.19601e-11
+Solver stopped within 335 - 1050 iterations