Questions about Blas

[Barry Smith]

    Since you are using a fill factor of 2, I assume that you are  
multiplying sparse matrices? In this case the BLAS are not used since  
they are only for dense matrix computations.

    If you use Emacs take a look at the Emacs Users section in the  
users manual. It will tell you a simple way to find all the  
MatMatMult_*** functions. Essentially in Emacs just use
esc . MatMatMult_ then esc 0 esc . to find the next use.

    Barry

On Sep 16, 2009, at 10:38 AM, Rodrigo Araujo wrote:

> Hi All,
>
> I am multiplying matrices using this line of code:
>
> ierr = MatMatMult(A, B, MAT_INITIAL_MATRIX, ((PetscReal) 2.0),  
> &C);CHKERRQ(ierr);
>
> But I need to see the source code of the file which has this  
> function, because I´d want to see how the functions from BLAS is  
> being used. Is that possible? If yes, could somebody tell me how.
>
> Thaks very much,
>
> Regards.
>
>
>
> -- 
> Rodrigo W. Pimentel Araujo
> Engenharia da Computação
> UFPE