From be036d6fc41a9352d1e4df3774ea67566cdc28fd Mon Sep 17 00:00:00 2001 From: bangerth Date: Thu, 20 Mar 2008 13:29:54 +0000 Subject: [PATCH] Add results for cycle 5. git-svn-id: https://svn.dealii.org/trunk@15919 0785d39b-7218-0410-832d-ea1e28bc413d --- deal.II/examples/step-22/doc/results.dox | 60 ++++++++++++++---------- 1 file changed, 35 insertions(+), 25 deletions(-) diff --git a/deal.II/examples/step-22/doc/results.dox b/deal.II/examples/step-22/doc/results.dox index 49ec193049..2950444f10 100644 --- a/deal.II/examples/step-22/doc/results.dox +++ b/deal.II/examples/step-22/doc/results.dox @@ -695,53 +695,63 @@ The picture of course changes in 3D: @code Refinement cycle 0 Number of active cells: 32 - Number of degrees of freedom: 1356 (1275+81) [0.13498 s] - Assembling... [0.081987 s] - Computing preconditioner... [0.056992 s] + Number of degrees of freedom: 1356 (1275+81) [0.336021 s] + Assembling... [0.204013 s] + Computing preconditioner... [0.128008 s] Solving... - Schur complement: 13 outer CG iterations for p [0.334949 s] - Block Schur preconditioner: 23 GMRES iterations [0.051992 s] + Schur complement: 13 outer CG iterations for p [0.552034 s] + Block Schur preconditioner: 23 GMRES iterations [0.072005 s] difference l_infty between solution vectors: 1.11101e-05 Refinement cycle 1 Number of active cells: 144 - Number of degrees of freedom: 5088 (4827+261) [0.739887 s] - Assembling... [0.39494 s] - Computing preconditioner... [0.310953 s] + Number of degrees of freedom: 5088 (4827+261) [0.79605 s] + Assembling... [0.428026 s] + Computing preconditioner... [0.30802 s] Solving... - Schur complement: 14 outer CG iterations for p [2.74158 s] - Block Schur preconditioner: 41 GMRES iterations [0.451931 s] + Schur complement: 14 outer CG iterations for p [4.01625 s] + Block Schur preconditioner: 41 GMRES iterations [0.632039 s] difference l_infty between solution vectors: 2.36202e-05 Refinement cycle 2 Number of active cells: 704 - Number of degrees of freedom: 22406 (21351+1055) [3.90041 s] - Assembling... [1.9877 s] - Computing preconditioner... [1.67175 s] + Number of degrees of freedom: 22406 (21351+1055) [4.12826 s] + Assembling... [2.15614 s] + Computing preconditioner... [1.6721 s] Solving... - Schur complement: 14 outer CG iterations for p [21.7047 s] - Block Schur preconditioner: 75 GMRES iterations [4.6303 s] + Schur complement: 14 outer CG iterations for p [30.6179 s] + Block Schur preconditioner: 75 GMRES iterations [6.01638 s] difference l_infty between solution vectors: 3.86168e-05 Refinement cycle 3 Number of active cells: 3168 - Number of degrees of freedom: 93176 (89043+4133) [17.3564 s] - Assembling... [8.67068 s] - Computing preconditioner... [7.41487 s] + Number of degrees of freedom: 93176 (89043+4133) [18.8452 s] + Assembling... [9.47659 s] + Computing preconditioner... [7.47647 s] Solving... - Schur complement: 15 outer CG iterations for p [253.15 s] - Block Schur preconditioner: 159 GMRES iterations [54.0888 s] + Schur complement: 15 outer CG iterations for p [228.366 s] + Block Schur preconditioner: 159 GMRES iterations [62.6799 s] difference l_infty between solution vectors: 7.34297e-05 Refinement cycle 4 Number of active cells: 11456 - Number of degrees of freedom: 327808 (313659+14149) [73.0609 s] - Assembling... [31.9341 s] - Computing preconditioner... [27.6778 s] + Number of degrees of freedom: 327808 (313659+14149) [81.1891 s] + Assembling... [34.9702 s] + Computing preconditioner... [29.5338 s] Solving... - Schur complement: 15 outer CG iterations for p [1190.48 s] - Block Schur preconditioner: 292 GMRES iterations [416.802 s] + Schur complement: 15 outer CG iterations for p [1224.65 s] + Block Schur preconditioner: 292 GMRES iterations [462.001 s] difference l_infty between solution vectors: 0.00019614 + +Refinement cycle 5 + Number of active cells: 45056 + Number of degrees of freedom: 1254464 (1201371+53093) [520.285 s] + Assembling... [136.909 s] + Computing preconditioner... [115.455 s] + Solving... + Schur complement: 14 outer CG iterations for p [6556.39 s] + Block Schur preconditioner: 590 GMRES iterations [3906.06 s] + difference l_infty between solution vectors: 0.000428885 @endcode Here, the block preconditioned solver is clearly superior to the Schur -- 2.39.5