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LU for large band matrices

PostPosted: Mon Aug 06, 2012 12:50 am
by henrikandresen
Hi All

I need a solver for a bandmatrix with a band of approx. 1000. There is only 1 solution required, so LU or direct solution are both almost identical in performance.

The tricky part is that the matrix is too large to fit in the memory of a single GPU, so I need some sort of data streaming between the system memory and GPU memory.

Is this something that can be done using CULA?

Best regards

Henrik Andresen

Re: LU for large band matrices

PostPosted: Mon Aug 06, 2012 11:04 am
by john
This might not be an easy fit for CULA. What is the long dimension of the matrix?

Re: LU for large band matrices

PostPosted: Mon Aug 06, 2012 11:11 pm
by henrikandresen
The long dimension will be something in the 10^5 to 10^6.

Cheers

Henrik Andresen

Re: LU for large band matrices

PostPosted: Fri Aug 10, 2012 8:56 am
by john
That's a tricky one since it's just over the size of GPU memory. We tend to call this "out of core" operation, which is unfortunately not something that's slated for the banded solvers any time soon.