[petsc-users] SuperLU options database

[Patrick Sanan]

More things you can do to avoid typing the arguments over and over are:
 - Use a file to specify options (PetscInitialize takes an argument for this file, which by default is ~/.petscrc ) 
- Set runtime options from within your code using PetscOptionsSetValue 
- Write a own shell script or makefile with a special target to run the executable with the options you'd like appended

On Jul 15, 2013, at 3:15 PM, Hong Zhang wrote:

> Su :
> We provide these via runtime options. With the latest petsc release (v3.4),
> you can get
> petsc/src/ksp/ksp/examples/tutorials/ex2.c: 
> ./ex2 -pc_type ilu -pc_factor_mat_solver_package superlu -hels |grep superlu
> ...
>   -mat_superlu_ilu_droptol <0.0001>: ILU_DropTol (None)
>   -mat_superlu_ilu_filltol <0.01>: ILU_FillTol (None)
>   -mat_superlu_ilu_fillfactor <10>: ILU_FillFactor (None)
>   -mat_superlu_ilu_droprull <9>: ILU_DropRule (None)
>   -mat_superlu_ilu_norm <2>: ILU_Norm (None)
>   -mat_superlu_ilu_milu <0>: ILU_MILU (None)
> 
> i.e., you can set/change your own options at runtime.
> 
> Hong
> 
> Hi, I am trying to use the external package SuperLU to solve a linear equation with ILUTP preconditioner. But the current PETSc only provides one option interface which is MatSuperluSetILUDropTol. There are actually many other options as suggested on the manual page of MATSOLVERSUPERLU, such as:
> 
> -mat_superlu_equil
> -mat_superlu_ilu_filltol
> -mat_superlu_ilu_fillfactor
> 
> etc. However, they all need to be invoked via command line.
> 
> Is there any way to set up other options for SuperLU in the code instead of using the command line? Because it's not so convenient to type in all those runtime commands every time you run a code. 
> 
> Thanks a lot.
> 
> Su
> 
> 

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