[petsc-users] Question on Hypre customization within a split

[Matthew Knepley]

On Sun, Nov 20, 2022 at 5:21 AM Edoardo alinovi <edoardo.alinovi at gmail.com>
wrote:

> Hello Barry/Matt/Jed,
>
> I am going on with testing and now the field split works great. Thanks a
> lot for the support!
>
> I have a question today about Hypre customization for a target split.
> let's say that my split 1 use hypre: * -UPfieldsplit_1_pc_type hypre *(this
> works ok)
>
> How can I then customize Hypre parameters for that split? I have tried
> something like:
>
>  *-**UPfieldsplit_1_pc_hypre_boomeramg_coarsen_type something*
>
> But it does not look to work. What am I missing?
>

This should work. The right way to debug this stuff is to first use

  -ksp_view, or maybe -UPksp_view

if that is your prefix. In that output, all objects have their prefix
stated, so it should be easy to see what to use,
and also to see the values.

  Thanks,

     Matt


> Thank you!
>


-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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