[petsc-users] How to force the code run with a given number of iterations?

[Jed Brown]

Fande Kong <fd.kong at siat.ac.cn> writes:

> Hi all,
>
> How to force the code run with a given number of iterations?
>
> I use the following script to run code, but the code stop after doing
> *two*iterations:
>
> * mpirun -n 2 ./linearElasticity  -ksp_type gmres -pc_type asm
> -pc_asm_overlap 1 -sub_pc_type ilu -sub_pc_factor_levels 2 -sub_ksp_type
> preonly -sub_pc_factor_mat_ordering_type rcm -ksp_view - -ksp_rtol 1e-5
> -ksp_max_it 500 -ksp_monitor -ksp_monitor_singular_value*
>
> The residual history is listed as follows:
>
> *  0 KSP Residual norm 9.732477596672e+31
>   0 KSP Residual norm 9.732477596672e+31 % max 1.000000000000e+00 min
> 1.000000000000e+00 max/min 1.000000000000e+00
>   1 KSP Residual norm 8.532845325800e+31
>   1 KSP Residual norm 8.532845325800e+31 % max 4.821161757157e+55 min
> 4.821161757157e+55 max/min 1.000000000000e+00
>   2 KSP Residual norm 3.648279603061e+23
>   2 KSP Residual norm 3.648279603061e+23 % max 1.234581012401e+79 min
> 2.318814661396e+55 max/min 5.324190125905e+23
> *
>  The residual is not small enough to stop.

-ksp_converged_reason will tell you why it exited early.
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