[petsc-dev] Preconditioners for GPU

[Paul Mullowney]

Hi Andrea,

The matrix type, aijcusparse has an ILU(n) (and ICC(n) for symmetric 
problems) preconditioner. The factorization is done on the CPU. The 
solves are done on the GPU via the cusparse library.

In the configure, do --download-txpetscgpu=yes

I would also look at:

http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MATSEQAIJCUSPARSE.html

for information on the aijcusparse class.

-Paul

> On Sun, May 5, 2013 at 4:26 PM, Andrea Lani <andrea.lani at gmail.com 
> <mailto:andrea.lani at gmail.com>> wrote:
>
>     Thanks, Matt! Let me re-iterate on the question... are there other
>     available preconditioners already ported to GPU, which are not
>     based on AMG (which is typically not suitable for my
>     convection-dominated CFD problems) and apart from BICGSTABCUSP?
>
>
> I believe that the txpetscgpu package has triangular solves for the GPU.
>
> BiCGStab is a Krylov method.
>
>    Matt
>
>     Andrea
>
>
>     On May 5, 2013, at 9:53 PM, Matthew Knepley <knepley at gmail.com
>     <mailto:knepley at gmail.com>> wrote:
>
>>     On Sun, May 5, 2013 at 2:48 PM, Andrea Lani
>>     <andrea.lani at gmail.com <mailto:andrea.lani at gmail.com>> wrote:
>>
>>         Dear Developers,
>>
>>         Could you please tell me the list of preconditioners for
>>         non-symmetric systems fully ported to multi-GPU and available
>>         in the current development version?
>>
>>
>>     In my opinion, there are no truly multi-GPU preconditioners
>>     anywhere. We can imagine them, like AMG with Chebychev smoothers, but
>>     I have not really seen any of them reliably work. The CUSP SA-AMG
>>     is the closest one in this category, and Steve Dalton is working on
>>     it this summer at ANL.
>>
>>       Matt
>>
>>         Thanks in advance
>>
>>         Andrea
>>
>>
>>
>>
>>     -- 
>>     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
>
>
>
>
> -- 
> 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

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