PS: can you suggest any example to assemble an approximation for Schur? I
am doing incompressible NS here, not really "sure" on how to deal with it
and something to start would be useful!
Matt I messed up a bit the things as I sent you the number of sub iters
done with preonly. It looks to be faster but outer iters goes up from 4
(with gmres as sub ksp) to 399, while run time goes from 37s to 10s. I
manage to drop a bit the run time by dropping the relative tolerance
Looking at the
On Sun, Feb 5, 2023 at 3:56 PM Edoardo alinovi
wrote:
> Maybe I managed to find out the number of iters of the field split by
> adding: fieldsplit_u_ksp_converged_reason.
>
You also want -fieldsplit_p_ksp_converged_reason so we can see the iterates
for the Schur complement.
> This gets printed
Maybe I managed to find out the number of iters of the field split by
adding: fieldsplit_u_ksp_converged_reason.
This gets printed 268 times:
Linear UPeqn_fieldsplit_u_ solve converged due to CONVERGED_ITS
iterations 1
1. You are using A11 as the preconditioning matrix for the Schur
complement.
Hi Matt,
Thanks for your feedback! Would you suggest me the command line to get the
number of sub iterations?
Il Dom 5 Feb 2023, 20:14 Matthew Knepley ha scritto:
> On Sun, Feb 5, 2023 at 1:26 PM Edoardo alinovi
> wrote:
>
>> Hello Petsc's crew,
>>
>> I would like to ask for some support in se
On Sun, Feb 5, 2023 at 1:26 PM Edoardo alinovi
wrote:
> Hello Petsc's crew,
>
> I would like to ask for some support in setting up the fieldsplit
> preconditioner in order to obtain better performance. I have already found
> some posts on the topic and keep experimenting, but I would like to hear
Hello Petsc's crew,
I would like to ask for some support in setting up the fieldsplit
preconditioner in order to obtain better performance. I have already found
some posts on the topic and keep experimenting, but I would like to hear
your opinion as experts :)
I have my fancy CFD pressure based
