Re: Tochnog now with LAPACK band solver- Works with 64-bit systems

On Tue, 2010-09-28 at 08:25 -0500, [email protected]
wrote:
> Dear Tochnogers, After continuing frustration over the inability of
> adjusting Superlu to work in a 64-bit environment, I started looking
> for options and found that both BLAS and LAPACK are included or are
> available for most modern 64-bit systems. So I tried to incorporate
> the ability of using a fast 64-bit library with Tochnog, and got it to
> work!!!! Atached are the standard Tochnog files with the modifications
> necesary to use the LAPACK band solver dgbsv. I have also included the
> OSX version of Tochnog which uses the Accelerate Framework which
> contains BLAS and LAPACK. IF YOU ARE BUILDING FOR OTHER SYSTEM, PLEASE
> MODIFY THE MAKEFILE AND ADJUST IT TO INCLUDE THE LOCATION OF BLAS AND
> LAPACK FOR YOUR SYSTEM. I have tested and it is significantly faster
> than the biconjugate solver which is the default solver. 

Hi Fernando,
I have built the new version, but have not been able to see much of a
difference. My platform is 64 bit Ubuntu-lucid 8 GB ram 4 cores. I do
see time improvements when run with multiple cores but not with lapack
solver. Maybe the atlas libs (from ubuntu) are not optimized. I'll
experiment a bit and report on my findings. 

Regards,
-osman


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