solving linear equation

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solving linear equation

Postby plutomars » Fri Nov 08, 2013 3:13 pm

HI All,

I need to solve a dense set of linear equations; Ax =b with A of size ~4000x4000.
Using degsv of lapack I can solve it with one core in 18 seconds. My computer has however 4 cores. I was wondering if scalapack has a similar function which is parallel and could speed up my problem.

regards,

Pluto mars
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Re: solving linear equation

Postby admin » Tue Nov 26, 2013 1:07 pm

Hi, Just use a multi-threaded blas, with lapack that will give you better performance.
Your matrix size is quiet small, so LAPACK should do a good job.
If you are looking at a multithreaded library, you can check out the plasma library: http://icl.cs.utk.edu/plasma/
Hope it helps
Julie
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