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Ublas : |
From: pipehappy (pipehappy_at_[hidden])
Date: 2008-01-11 16:13:59
On 1/11/08, nisha kannookadan <nishak44_at_[hidden]> wrote:
>
> Hi
>
> The feedback was real helpful.
>
> > As others members of this list have suggested, you can use the BLAS
> > bindings of ublas to link an optimized version of BLAS like ATLAS,
> > gotoblas, Intel MKL, AMD ACML, etc.
>
> As far I understood are bindings only useful for things like computation
> of the eigenvalue etc, but for the basic things like I do, its not helpful.
> For me, its not clear, how to use this bindings and were to find it.
>
The following link may be helpful for using the bindings.
http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?Linear_Algebra_With_UBLAS
> > Another solution is to use sparse storage, if your matrix sparse.
> > According to my experience with ublas and linear solvers, sparse storage
> > may be faster than dense storage even for small sizes (n=20) and low
> > percentage of non-zeros (60%). In my simulation software based on ublas,
> > sparse computations run 10-100 times faster than Matlab sparse
> > computations.
>
> I tried to use sparse matrix, but it made it for some reason even slower, so
> I discarded it. ANd I guess the vectors are the problem, which are quite full
> anyways.
>
> Thank you so much
> Nisha K
>
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