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Re: question about CUDA

• To: mathgroup at smc.vnet.net
• Subject: [mg115681] Re: question about CUDA
• From: Patrick Scheibe <pscheibe at trm.uni-leipzig.de>
• Date: Tue, 18 Jan 2011 05:50:07 -0500 (EST)

Sorry,

I'm not up-to-date with the currently used methods. You'll have to check
the literature about that.

Cheers
Patrick

On Mon, 2011-01-17 at 19:12 +0300, Ivan Smirnov wrote:
> Can you see then any ways to boost performance with CUDA for searching
> of possible solutions of any diophantine equations with powers?
> 
> 2011/1/17 Patrick Scheibe <pscheibe at trm.uni-leipzig.de>
>         Hi,
>         
>         this is not possible for one obvious and several other
>         reasons.
>         The obvious one is, that it is not implemented and *maybe*
>         will never be
>         for several reasons.
>         You cannot think of CUDA as some kind of extension which
>         allows you to
>         run Mathematica code on the faster graphics card. Every
>         function has to
>         be separately implemented for CUDA.
>         
>         The version 8 Mathematica has several function which use CUDA,
>         mainly
>         for image processing and for matrix operations. Find an
>         overview in the
>         doc-center here
>         
>         CUDALink/guide/CUDALink
>         
>         CUDA is best used for highly "data-parallel" algorithms [1]
>         which is, as
>         far as I can say, not the case for Solve.
>         
>         Cheers
>         Patrick
>         
>         [1] http://en.wikipedia.org/wiki/Data_parallelism
>         
>         
>         
>         On Mon, 2011-01-17 at 18:56 +0300, Ivan Smirnov wrote:
>         > Patrick, thanks for answer. I have such thoughts.
>         > Can you say, what additional code is needed to run Solve
>         command in
>         > Mathematica 8 with CUDA?
>         >
>         > 2011/1/17 Patrick Scheibe <pscheibe at trm.uni-leipzig.de>
>         >         Hi,
>         >
>         >         no, this is not true. You can use CUDA enabled cards
>         for
>         >         computations
>         >         even if this is the only card in the system. It
>         should be
>         >         clear, that
>         >         then some resources of your graphics card may be
>         used by other
>         >         applications currently running. Another thing is
>         that your
>         >         CUDA program
>         >         may use too much memory or has too many bugs and
>         crashes your
>         >         system..
>         >         this is the point where a second card become handy.
>         For now,
>         >         leave it
>         >         like that and start playing with CUDA. The
>         specification of
>         >         your card
>         >         here
>         >
>         >
>         http://www.nvidia.com/object/product_geforce_8800_gt_us.html
>         >
>         >         shows that you have 112 CUDA Cores and 512 MB Ram,
>         which is
>         >         fine to see
>         >         the magic.
>         >
>         >         Cheers
>         >         Patrick
>         >
>         >
>         >
>         >         On Mon, 2011-01-17 at 05:36 -0500, Ivan Smirnov
>         wrote:
>         >         > Hello.
>         >         > I'm planning to start using CUDA.
>         >         > If I have 8800GT card (it supports CUDA), can I
>         start use
>         >         CUDA computations
>         >         > in Mathematica 8 with just this card or I need
>         install one
>         >         more card in that
>         >         > PC? (I heard that one man said that supposedly
>         there are
>         >         needed 2 or more
>         >         > cards as CUDA are parallel computations - is it
>         true?).
>         >         >
>         >         > Ivan Smirnov
>         >         >
>         >         >
>         >
>         >
>         >
>         >
>         
>         
>