efficient small matrix solver

Barry Smith bsmith at mcs.anl.gov
Thu Jan 26 10:45:49 CST 2006


   You can the routines in src/mat/impls/baij/seq/dgefa*.c see also
src/inline/ilu.c  See also src/mat/impls/baij/seq/baijfact12.c where
there are some factorizations specifically for the Intel SSE.


On Thu, 26 Jan 2006, Matt wrote:

> Hi,
> We use PETSc and noticed on the web site that you built (from linpack)
> some routines to factor/solve small dense matrices efficiently. What
> are those routines? I'd like to get the bottom level routines as I want
> to modify them just a bit more. (I want to set the matrix size as a
> constant to help the compiler, and possibly add some pragmas to help
> the compiler.)
> Thanks,
> Matt

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