How to switch between the BLAS/LAPACK implementation and OpenBLAS/GotoBLAS optimized version =============================================================================== BLAS: update-alternatives --config libblas.so.3 LAPACK: update-alternatives --config liblapack.so.3 More information are available here: http://wiki.debian.org/DebianScience/LinearAlgebraLibraries Building Optimized OpenBLAS Packages on your ARCH ================================================= Building your own optimized packages of OpenBLAS is straightforward. Just get the sources of the package: # apt-get source openblas and type # fakeroot debian/rules custom it should produce a package called: # ../libopenblas-base_*.deb which should be optimized for the architecture OpenBLAS has been built on. All dependencies can be installed with the following command: # aptitude install build-essential dpkg-dev cdbs devscripts patch Please note that, since version openblas 0.1alpha1-5, libopenblas-base provides a multiple architecture library. All kernel will be included in the library and dynamically switched the best architecutre at run time. -- Sylvestre Ledru Tue, 31 May 2011 13:56:22 +0200