RE: Updated: octave-2.1.71-2

[Billings, Paul]

I apologize, I was completely in error.  I mixed up which screen I was
looking at.  The octave-2.1.71-2 build you just put out was fast for matrix
ops as well.  The octave_config_info reflects both FFTW and lapack/blas
libs.

So sorry for the bad report!

Paul


> -----Original Message-----
> From: Paul Billings [mailto:address@hidden
> Sent: Monday, August 15, 2005 10:23 AM
> To: address@hidden
> Cc: address@hidden; address@hidden
> Subject: RE: Updated: octave-2.1.71-2
>
>
> James,
>
> Good job on the FFTW packaging.  I can confirm identical FFT
> speeds with a version that I had explicitly built to work with FFTW.
>
> On the down side, however: matrix operations are slower.  Almost
> 70% slower for the 256x256 matrix multiply I just tested.
> octave_config_info('BLAS_LIBS') returns a blank string, whereas
> the previous build had returned "-llapack -lblas".  I didn't
> build these libraries, so they must be coming from Cygwin.
> Perhaps they should be added to the dependency tree for octave?
>
> Incidentally, your long-term goal of getting ATLAS into the
> build/installation procedure will be well worth it.  The matrix
> multiply when using the above mentioned libblas is almost a
> factor of 10 slower than when using ATLAS.
>
> Paul
>
>
> > -----Original Message-----
> > From: James R. Phillips [mailto:address@hidden
> > Sent: Monday, August 15, 2005 3:10 AM
> > To: address@hidden
> > Cc: address@hidden; address@hidden
> > Subject: Updated: octave-2.1.71-2
> >
> >
> > INFO
> > ====
> > The cygwin octave package has been updated to release 2.1.71-2.
> >
> > Changes:
> >
> >  +Rebuilt to link against fftw3 libraries, for faster fft operations.
> >  +Links with --enable-auto-image-base flag to reduce need for
> > rebasing dlls.
> >  +Fixed packaging error related to /usr/share/info/dir
> >
> > More information in the octave-2.1.71.README file.
> >
> > GNU Octave is a (mostly Matlab (R) compatible) high-level
> > language, primarily
> > intended for numerical computations.  It provides a convenient
> > command-line
> > interface for solving linear and nonlinear problems numerically.
> >
> > Octave Home Page: http://www.octave.org
> >
> > UPDATE
> > ======
> >
> > To update your installation, click on the "Install Cygwin now"
> link on the
> > http://cygwin.com/ web page.  This downloads setup.exe to your
> > system.  Save it
> > and run setup, answer the questions and pick up 'octave' from the 'Math'
> > category. Then click on the 'skip' field next to 'octave' until
> > '2.1.71-2' is
> > displayed.
> >
> > DOWNLOAD:
> > =========
> > Note that downloads from sources.redhat.com (aka cygwin.com)
> > aren't allowed due
> > to bandwidth limitations.  This means that you will need to find
> > a mirror which
> > has this update, please choose the one nearest to you:
> >
> > http://cygwin.com/mirrors.html
> >
> >
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