Hi Sergey: I recently ran into similar problems with ACML.
See an original bug report (https://github.com/numpy/numpy/issues/2728) & documentation fix (https://github.com/numpy/numpy/pull/2809). Personally, I ended up using a patch similar to https://github.com/numpy/numpy/pull/2751 to force NumPy to respect site.cfg (so that I could put the libacml in the [blas_opt] & [lapack_opt] sections). But this seems unlikely to get merged into NumPy as it changes the behavior of site.cfg. Instead I think we should discuss adding a "have cblas" flag of some sort to the [blas] section so that the user can still get _dotblas to compile. -Brad On Friday, December 14, 2012 at 1:17 AM, Sergey Bartunov wrote: > Hi. I'm trying to build numpy (1.6.2 and master from git) with > OpenBLAS on Ubuntu server 11.10. > > I succeed with this just once and performance boost was really big for > me, but unfortunately something went wrong with my application and I > had to reinstall numpy. After that I couldn't reproduce this result > and even just perform faster than default numpy installation with no > external libraries anyhow. > > Now things went even worse. I assume that numpy built with BLAS and > LAPACK should do dot operation faster than "clean" installation on > relatively large matirces (say 2000 x 2000). Here I don't use OpenBLAS > anyway. > > I install libblas-dev and liblapack-dev by apt-get and after that > build numpy from sources / by pip (that doesn't matter for the > result). Building tool reports that BLAS and LAPACK are detected on my > system, so says "numpy.distutils.system_info" after installation. But > matrix multiplication by dot takes the same time as clean installation > (12 s vs 0.16 s with OpenBLAS). That's the first thing I'm wondering > about. > > Nevertheless I tried to compile numpy with OpenBLAS only. I have > forced this by setting ATLAS="" BLAS=/usr/lib/libopenblas.a > LAPACK=/usr/lib/libopenblas.a as I saw somewhere in the internet. I > had installed numpy exactly this way at the first time when I was > lucky. But now it doesn't work for me. I tryied installing OpenBLAS > from sources and as libopenblas-dev ubuntu package. > > So how can I fix this? Many thanks in advance. > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org (mailto:NumPy-Discussion@scipy.org) > http://mail.scipy.org/mailman/listinfo/numpy-discussion _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion