Hello, Yes, you can use the "libMesh Performance" output to see how long each type of solve took. To get an RB solve time I would normally do an "online stage" solve and look at the timing info for "rb_solve". To get an FE solve time, you can look at the average time of a truth_solve, that should be fine.
Note that the speedup you observe generally depends a lot on the details of the problem, and is generally larger for problems with large FE meshes (especially in 3D). Best, David On Fri, Jun 8, 2018 at 1:18 AM, <[email protected]> wrote: > Hello, all. > > > > I want to compare the computation time between FE and RB methods, so I > looked at "libMesh Performance." > > Here, I used the "Avg Time with Sub" of "truth_solve()" as the FE solve > time > in the RB offline stage. > > And as the RB solve time, I used the "Avg Time with Sub" of "rb_solve()" in > the RB online stage. > > But I don't know if these are right ways to compare computation times. > > > > Please tell me which values are generally used to compare computation times > between FE and RB methods. > > > > For reference, results of "libMesh Performance" in my codes are as follows. > > (Offline stage) > > > > libMesh Performance: Alive time=1702.12, Active time=1692.06 > > ------------------------------------------------------------ > ---------------- > ----------------------------------- > > | Event nCalls > Total Time Avg Time Total Time Avg Time > % of Active Time | > > | > w/o Sub w/o Sub With Sub With Sub w/o S > With S | > > ------------------------------------------------------------ > ---------------- > ----------------------------------- > > . > | > > (skip) > | > > . > | > > | RBConstruction > | > > | add_scaled_matrix_and_vector() 63 16.6728 > 0.264648 37.1072 0.589003 0.99 2.19 > | > > | clear() 1 > 0.0356 0.035607 0.0356 0.035607 > 0.00 0.00 | > > | compute_Fq_representor_innerprods() 1 0.0161 > 0.016134 2.9970 2.997019 0.00 0.18 > | > > | compute_max_error_bound() 17 0.0722 > 0.004249 201.1186 11.830503 0.00 11.89 > | > > | enrich_RB_space() 16 0.6050 > 0.037811 0.6050 0.037811 0.04 0.04 > | > > | train_reduced_basis() 1 0.0032 > 0.003184 1661.9738 1661.973753 0.00 98.22 > | > > | truth_assembly() 16 > 40.6187 2.538670 40.6187 2.538670 > 2.40 2.40 | > > | truth_solve() 16 > 0.0534 0.003335 92.7523 5.797018 > 0.00 5.48 | > > | update_RB_system_matrices() 16 41.3210 > 2.582562 41.3210 2.582562 2.44 2.44 > | > > | update_residual_terms() 16 1222.1235 > 76.382721 1323.1667 82.697919 72.23 78.20 > | > > . > | > > (skip) > | > > . > | > > ------------------------------------------------------------ > ---------------- > ----------------------------------- > > (Online stage) > > > > libMesh Performance: Alive time=3.62904, Active time=2.99889 > > ------------------------------------------------------------ > ---------------- > ----------------------------------- > > | Event nCalls > Total Time Avg Time Total Time Avg Time > % of Active Time | > > | > w/o Sub w/o Sub With Sub With Sub w/o S > With S | > > ------------------------------------------------------------ > ---------------- > ----------------------------------- > > . > | > > (skip) > | > > . > | > > | RBEvaluation > | > > | clear() 1 > 0.0002 0.000194 0.0002 0.000194 > 0.01 0.01 | > > | compute_residual_dual_norm() 1 0.1543 > 0.154302 0.1543 0.154302 5.15 5.15 > | > > | legacy_read_offline_data_from_files() 1 0.0218 > 0.021824 0.0247 0.024672 0.73 0.82 > | > > | rb_solve() 1 > 0.0002 0.000175 0.1545 0.154478 > 0.01 5.15 | > > | read_in_basis_functions() 1 0.0000 > 0.000005 0.3755 0.375475 0.00 12.52 > | > > | read_in_vectors_from_multiple_files() 1 0.0706 > 0.070551 0.3755 0.375469 2.35 12.52 > | > > | resize_data_structures() 1 0.0028 > 0.002847 0.0028 0.002847 0.09 0.09 > | > > . > | > > (skip) > | > > . > | > > ------------------------------------------------------------ > ---------------- > ----------------------------------- > > > > I look forward to your reply. > > > > Thank you. > > > > Regards, > > SKang > > > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Libmesh-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/libmesh-users > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
