[petsc-users] PCGASMSetLocalSubdomains

[Hui Zhang]

On May 22, 2012, at 8:14 PM, Dmitry Karpeev wrote:

> It sounds like you need to write a new PC implementation, possibly reusing pieces of PCASM.

Thanks! But then it will be too much work, I think, and what I tried to avoid.

> Then you have control of what is being set up and when. Otherwise you are essentially hacking
> PCASM and using its internal subsolvers, which are only available after PCSetUp().

Yes. Maybe I should follow your advice. Thanks again!

>  PCCOMPOSITE doesn't look like the right framework for this.
> 
> Dmitry.
> 
> On Tue, May 22, 2012 at 5:23 AM, Hui Zhang <mike.hui.zhang at hotmail.com> wrote:
> Hi,
> 
> I have got a new question.  I'm now constructing a PCComposite from PCASM and another PCKSP (coarse
> problem). And construction of PCKSP needs to use the subksp's of PCASM. So I need to PCSetUp on the
> PCASM, right?  But the KSP using PCComposite would setup PCASM again.  How can I avoid twice setup
> of PCASM ?
> 
> Thanks,
> Hui
> 
> 
> 

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