Unfortunately, ILU(3) is not something that runs well on GPUs so ideally,
we should find a preconditioner that works well in terms of iteration count but
also runs well on GPUs. You can start by saying a bit about the nature of your
problem. Is it a PDE? What type of discretization?
Barry
> On Nov 8, 2023, at 9:53 AM, Ramoni Z. Sedano Azevedo
> <[email protected]> wrote:
>
>
> Hey!
>
> I am using PETSC in Fortran code and we apply the MPI process to parallelize
> the code.
>
> At the moment, the options that have been used are
> -ksp_monitor_true_residual
> -ksp_type bcgs
> -pc_type bjacobi
> -sub_pc_type ilu
> -sub_pc_factor_levels 3
> -sub_pc_factor_fill 6
>
> Now, we want to use multiple GPUs and I would like to know if there is a
> better solver and preconditioner pair to apply in this case.
>
> Yours sincerely,
> Ramoni Z. S . Azevedo
>
>
