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Tips and tricks: Difference between revisions
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→Changing BLAS: Should not write as if all Linux workstations used apt-get
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===Changing BLAS=== | ===Changing BLAS=== | ||
Many Octave functions are wrappers to optimized numerical libraries, notably BLAS and ATLAS. It is possible to achieve impressive performance gains by simply using a library tuned to your platform. One example is using OpenBLAS to replace the default BLAS implementation ([http://www.stat.cmu.edu/~nmv/2013/07/09/for-faster-r-use-openblas-instead-better-than-atlas-trivial-to-switch-to-on-ubuntu/ further details]). | Many Octave functions are wrappers to optimized numerical libraries, notably BLAS and ATLAS. It is possible to achieve impressive performance gains by simply using a library tuned to your platform. One example is using OpenBLAS to replace the default BLAS implementation ([http://www.stat.cmu.edu/~nmv/2013/07/09/for-faster-r-use-openblas-instead-better-than-atlas-trivial-to-switch-to-on-ubuntu/ further details]). | ||
On Linux, this just takes a few commands | On some Linux distributions, this just takes a few commands. For instance, on Ubuntu, it usually suffices to run | ||
sudo apt-get install libopenblas-base libatlas3gf-base | sudo apt-get install libopenblas-base libatlas3gf-base | ||
followed by | |||
sudo update-alternatives --config libblas.so.3 | sudo update-alternatives --config libblas.so.3 | ||
and | and then selecting the openblas option. | ||