Questions about BLAS

[Matthew Knepley]

On Thu, Aug 27, 2009 at 1:35 PM, Rodrigo Araujo <rodrigowpa at gmail.com>wrote:

> Matt,
>
> Thank you for answering. Another question. Which functions does the PETSc
> call the BLAS routines to multiply those matrices?


Only the DENSE amtrix type uses BLAS.

  Matt


>
> Thanks.
>
> 2009/8/27 Matthew Knepley <knepley at gmail.com>
>
>> On Thu, Aug 27, 2009 at 12:15 PM, Rodrigo Araujo <rodrigowpa at gmail.com>wrote:
>>
>>> Good afternoon,
>>>
>>> I am multiplying two matrices using the function
>>> MatMatMult_MPIAIJ_MPIAIJ, but I'd like to know if this function calls the
>>> BLAS routine that multiply matrices, and if yes ,where.
>>
>>
>> No, this is for sparse matrices.
>>
>>  Matt
>>
>>
>>>
>>> Best Regards.
>>>
>>> --
>>> Rodrigo W. Pimentel Araujo
>>> Engenharia da Computação
>>> UFPE
>>>
>>
>>
>>
>> --
>> 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
>>
>
>
>
> --
> Rodrigo W. Pimentel Araujo
> Engenharia da Computação
> UFPE
>



-- 
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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