Longer [Computing Jacobian................] time than before

[Bearunner]

Dear all,

I use the [Porous flow] module to simulate thermal-hydraulic processes in porous media.

However, using the same inputs (input files and meshes, etc.) we created last year, the updated MOOSE version needs longer [Computing Jacobian................] time than the old version.

[old version MOOSE]: faster [Computing Jacobian................]
Framework Information:
MOOSE Version: git commit 2d9ac4d on 2023-03-29
LibMesh Version:
PETSc Version: 3.16.6
SLEPc Version: 3.16.2
Current Time: Wed Sep 13 00:25:15 2023
Executable Timestamp: Thu May 25 16:15:28 2023

[Newversion MOOSE]: slower [Computing Jacobian................]
Framework Information:
MOOSE Version: git commit 0b297bb on 2024-02-15
LibMesh Version:
PETSc Version: 3.20.3
SLEPc Version: 3.20.1
Current Time: Wed May 15 14:47:54 2024
Executable Timestamp: Tue May 14 19:25:11 2024

Here is the log of the current version.

Time Step 1, time = 1, dt = 1

0 Nonlinear |R| = 1.579338e+00

Computing Jacobian................
  Computing DiracKernels                                                             **[  9.30 s]** [  488 MB]
Finished Computing Jacobian                                                          **[ 97.48 s]** [  499 MB]

  0 Linear |R| = 1.579338e+00
  1 Linear |R| = 1.186822e-01
  2 Linear |R| = 9.897281e-02
  3 Linear |R| = 9.131680e-02
  4 Linear |R| = 2.607287e-02
  5 Linear |R| = 1.666023e-02
  6 Linear |R| = 1.267173e-02
  7 Linear |R| = 1.101330e-02
  8 Linear |R| = 3.424740e-03
  9 Linear |R| = 1.840177e-03
 10 Linear |R| = 9.638534e-05
 11 Linear |R| = 3.917202e-05
 12 Linear |R| = 1.628395e-05
 13 Linear |R| = 1.828763e-06
 14 Linear |R| = 1.241097e-06
 15 Linear |R| = 2.503577e-07
 16 Linear |R| = 2.143965e-08
 17 Linear |R| = 3.366161e-10
 18 Linear |R| = 1.418001e-11
 19 Linear |R| = 3.183701e-13

1 Nonlinear |R| = 9.684284e-04
Computing Jacobian................. [ 96.20 s] [ 755 MB]
0 Linear |R| = 9.684284e-04
1 Linear |R| = 2.467006e-06
2 Linear |R| = 2.153255e-06
3 Linear |R| = 1.582451e-06
4 Linear |R| = 2.866890e-07
5 Linear |R| = 2.420947e-07
6 Linear |R| = 2.013037e-07
7 Linear |R| = 1.693336e-07
8 Linear |R| = 1.184412e-08
9 Linear |R| = 5.044444e-09
10 Linear |R| = 1.785820e-09
11 Linear |R| = 7.671236e-10
12 Linear |R| = 2.124358e-10
13 Linear |R| = 1.320051e-11
14 Linear |R| = 5.053740e-12
15 Linear |R| = 2.289863e-12
16 Linear |R| = 2.860599e-13
17 Linear |R| = 5.967287e-15
18 Linear |R| = 1.015925e-16

2 Nonlinear |R| = 3.515348e-11

Solve Converged!

Finished Solving [207.61 s] [ 539 MB]

Outlier Variable Residual Norms:
porepressure: 2.350344e-11
temperature: 2.573907e-11

Could you please help me with this? Thanks!

J

[GiudGiud]

Hello

We cant know which change over a year may have slowed it down. It could be anything.
I would recommend profiling
https://mooseframework.inl.gov/application_development/profiling.html

and trying to make the current version faster by proposing changes in the hot spots of the code
Guillaume