Joe Georger writes: > I have a couple of questions regarding the use of GSL with ATLAS. I am > working on a dual Opteron running Suse 9.3 Pro. I installed GSL v1.6.5 > from the Suse dvd. I downloaded and installed ATLAS 3.7.11. I wrote a > test code to do a QR decompostion with N=1000.
Hello, I don't know what options SUSE uses for building GSL but it sounds like they are good ones (perhaps there is some way to find out by installing the source rpm?) . Maybe they use -msse2 -mfpmath. To make use of BLAS in the QR decomposition you will need to build the library itself with CFLAGS=".... -DUSE_BLAS" (look in linalg/householder.c to see why) The USE_BLAS is not documented (sorry) -- right now not all of the library is using BLAS. Where there was existing non-BLAS code with "for" loops which were working it was a case of "if it ain't broke, don't fix it". I will change USE_BLAS to be the default next time. There are other routines which also need to be blas-ified. -- Brian Gough Network Theory Ltd, Publishing Free Software Manuals --- http://www.network-theory.co.uk/ _______________________________________________ Help-gsl mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-gsl
