Re: [Help-gsl] Parallelization of GSL CBLAS implementation with OpenMP?

[John Chludzinski]

Just got finished last night building GotoBLAS on a Windows 7 box using
MinGW.  Besides having to download wget and build and install it, the make
proceeded rather painlessly (wget is used to download LAPACK).  All I can
say is remember to use the -lgfortran directive when linking against the
GotoBLAS static library, which also contains the LAPACK routines.  BTW, it
took a while to find an LAPACK solution that would work with MinGW.

---John

2011/1/6 José Luis García Pallero <address@hidden>

> El día 6 de enero de 2011 21:15, Rhys Ulerich <address@hidden>
> escribió:
> >> I think that using OpenMP in GSL CBLAS would improve the speed of the
> >> standard GSL distribution and it wouldn't suppose a big effort of
> >> programming.
> >
> > Adding OpenMP threading to GSL's CBLAS may improve the speed.
> > However, it would be a serious programming effort to write a
> > multithreaded CBLAS implementation from scratch that performed
> > reasonably on many platforms.  Why not directly use a BLAS that's
> > optimized (e.g. ATLAS, GotoBLAS, MKL, ESSL, ...)?
>
> Yes, you are right. In my first mail I pointed this issue:
>
> "
> Is clear that who needs powerful must use an optimised CBLAS
> implementation as ATLAS or GotoBLAS (now free software under the BSD
> license: http://www.tacc.utexas.edu/tacc-projects/gotoblas2/) but I
> think that using OpenMP in GSL CBLAS would improve the speed of the
> standard GSL distribution and it wouldn't suppose a big effort of
> programming.
> "
>
> > GSL allows linking a non-GSL BLAS specifically because vendor-provided
> > BLAS libraries do things like cache management and threading so well.
> > See
> http://www.gnu.org/software/gsl/manual/html_node/Linking-with-an-alternative-BLAS-library.html
> >
> > - Rhys
> >
>
>
>
> --
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> José Luis García Pallero
> address@hidden
> (o<
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