[petsc-users] CUDA with complex number

[recrusader]

Dear Paul,

Please find the changelog in the following link for CUSP 0.2.0
http://code.google.com/p/cusp-library/source/browse/CHANGELOG

They has added cusp:complex class to support complex number-based operation.

does it not work for PETSc?

Thanks a lot,
Yujie


On Mon, Jan 23, 2012 at 3:28 PM, Paul Mullowney <paulm at txcorp.com> wrote:

> I would claim that Petsc does not support GPU capabilities for complex
> numbers right now.
>
> The CUSP library is templated over the scalar type (i.e. float or double),
> however I don't think it supports complex numbers. Although, I could be
> wrong on this.
>
> It could be somewhat straightforward to move from CUSP to CUSPARSE (yes,
> these are different Nvidia libraries). I believe CUSPARSE supports SpMV for
> complex types. It also supports triangular solve for complex types.
>
> -Paul
>
>
>      This is an installation issue, please send all installation issues to
>> petsc-maint at mcs.anl.gov with the entire configure.log
>>
>>
>>
>>
>>    You can try editing config/PETSc/packages/cuda.py and removing the two
>> lines
>>
>>     if self.scalartypes.scalartype == 'complex':
>>       raise RuntimeError('Must use real numbers with CUDA')
>>
>>    As it says we have never tested for complex so I do not know how far
>> it is from working.
>>
>>     Barry
>>
>> On Jan 23, 2012, at 1:24 PM, recrusader wrote:
>>
>>  Dear PETSc Developers,
>>>
>>> I am compiling PETSc-dev using GPU in complex number mode.
>>> However, when I configure PETSc-dev, I get the following errors
>>> "
>>> ****************************************************************
>>> *******************
>>>         UNABLE to CONFIGURE with GIVEN OPTIONS    (see configure.log
>>> for details):
>>> ------------------------------**------------------------------**
>>> -------------------
>>> Cannot use cuda with complex numbers it is not coded for this capability
>>> ****************************************************************
>>> *******************
>>> "
>>> I have checked CUSP. The latest version can support complex number.
>>> What should I do for CUDA?
>>> Thank you very much.
>>>
>>> Best,
>>> Yujie
>>>
>>
>
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