[petsc-users] Doubt about PCILU

[Ahmed Mansur]

Thanks a lot.

El jue., 3 de noviembre de 2022 10:22 a. m., Zhang, Hong <hzhang at mcs.anl.gov>
escribió:

> PETSc does not support 'ilutp' . Sequential superlu supports it. You can
> install petsc with superlu, then use runtime options to activate 'ilutp' ,
> e.g.,
> petsc/src/ksp/ksp/tutorials
> ./ex2 -ksp_view -pc_type ilu -pc_factor_mat_solver_type superlu -help
> |grep superlu
> ...
>   -mat_superlu_replacetinypivot: <FALSE : FALSE> ReplaceTinyPivot (None)
>   ...
>   -mat_superlu_ilu_droptol <0.0001 : 0.0001>: ILU_DropTol (None)
>   -mat_superlu_ilu_filltol <0.01 : 0.01>: ILU_FillTol (None)
>   -mat_superlu_ilu_fillfactor <10. : 10.>: ILU_FillFactor (None)
>   -mat_superlu_ilu_droprull <now 9 : formerly 9>: ILU_DropRule (None)
>
> Hong
> ------------------------------
> *From:* petsc-users <petsc-users-bounces at mcs.anl.gov> on behalf of Ahmed
> Mansur <ahmedlp9 at gmail.com>
> *Sent:* Thursday, November 3, 2022 8:49 AM
> *To:* petsc-users <petsc-users at mcs.anl.gov>
> *Subject:* [petsc-users] Doubt about PCILU
>
> Hi, I'm trying to use ILU as GMRES preconditioner (using PCILU), my
> question is how use ILU as 'ilutp' type like MATLAB ( ILU factorization
> with threshold and pivoting.  )
> Thanks. Regards
>
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