On 05/08/2017 01:52 AM, Jan Engelhardt wrote:

On Sunday 2017-05-07 21:22, auxsvr wrote:

...

There are several options to licence Intel MKL (free or community licence) , which makes including it in the OBS easier. If this is not allowed, what is the best way to package packages depending on it, e.g. numpy or pytorch?

The best is not to think about it --- because we already have a python-numpy package.

The python-numpy we have already is obviously not what he wants ... @Peter I don't think Intel MKL is allowed on OBS. If you are able to build numpy against MKL locally then you could download openSUSE's source rpm of python-numpy and change the spec file so that it builds with MKL. On the other hand you may already see quite good numpy performance if you install openblas. openblas as well as intel MKL provide optimized libblas.so and liblapack.so implementations which may speed-up numpy dramatically even without rebuild. Just make sure that numpy uses the libs from openblas or MKL at run time. Though to use some of the extra MKL functionality beyond lapack you may need to have it at build time. cu, Rudi -- To unsubscribe, e-mail: opensuse-packaging+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-packaging+owner@opensuse.org

It might be simpler for users to use MKL if numpy is built against lapack/blas. A user just need to install MKL and add MKL to the libblas.so.3 and liblapack.so.3 groups. Also, openblas itself has 3 different flavors and it seems that numpy is linked to libopenblas_pthreads.so.0 and it cannot be changed using "update-alternatives" because only "libopenblas.so.0" can be configured by "update-alternatives" by default. If we want to ship an optimized numpy , is it them same if we build numpy against lapack/blas and put a "Requires: openblas" in the .spec file? Installing openblas itself will update the links to the libblas.so.3 and liblapack.so.3, right? Sincerely yours Xing On 05/08/2017 11:15 AM, Todd Rme wrote:

On Mon, May 8, 2017 at 11:01 AM, Xing wrote:

...

On 05/07/2017 03:22 PM, auxsvr wrote:

...

Hi,

There are several options to licence Intel MKL (free or community licence) , which makes including it in the OBS easier. If this is not allowed, what is the best way to package packages depending on it, e.g. numpy or pytorch? The current numpy/scipy requires openblas. But I think it might be better to compile numpy/scipy against the standard "unoptimized" lapack/blas and the uses can switch to other optimized lapack/blas such as openblas/mkl at runtime using "update-alternatives"?

Sincerely yours Xing We can't support MKL using update-alternatives because it isn't open-source. The rules of OBS forbid us from distributing it. So there are really only two choices, an unoptimized version using lapack and an optimized version using openblas. I don't see an advantage to shipping the unoptimized version.

-- To unsubscribe, e-mail: opensuse-packaging+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-packaging+owner@opensuse.org

Thanks! Now I did recall that I have to hack some files in numpy in order to switch the LAPACK/BLAS implementations at runtime when numpy was built against the unoptimzed LAPACK/BLAS. But that patch no longer works (an no longer needed) after numpy-1.10 or so. It seems that if someone need to use mkl, they do need to install MKL first and then compile numpy from source. Sincerely yours Xing On 05/08/2017 11:57 AM, Todd Rme wrote:

On Mon, May 8, 2017 at 11:36 AM, Xing wrote:

...

On 05/08/2017 11:15 AM, Todd Rme wrote:

...

On Mon, May 8, 2017 at 11:01 AM, Xing wrote:

...

...

Hi,

There are several options to licence Intel MKL (free or community licence) , which makes including it in the OBS easier. If this is not allowed, what is the best way to package packages depending on it, e.g. numpy or pytorch? The current numpy/scipy requires openblas. But I think it might be better to compile numpy/scipy against the standard "unoptimized" lapack/blas and

On 05/07/2017 03:22 PM, auxsvr wrote: the uses can switch to other optimized lapack/blas such as openblas/mkl at runtime using "update-alternatives"?

Sincerely yours Xing We can't support MKL using update-alternatives because it isn't open-source. The rules of OBS forbid us from distributing it. So there are really only two choices, an unoptimized version using lapack and an optimized version using openblas. I don't see an advantage to shipping the unoptimized version. It might be simpler for users to use MKL if numpy is built against lapack/blas. A user just need to install MKL and add MKL to the libblas.so.3 and liblapack.so.3 groups.

Also, openblas itself has 3 different flavors and it seems that numpy is linked to libopenblas_pthreads.so.0 and it cannot be changed using "update-alternatives" because only "libopenblas.so.0" can be configured by "update-alternatives" by default.

If we want to ship an optimized numpy , is it them same if we build numpy against lapack/blas and put a "Requires: openblas" in the .spec file? Installing openblas itself will update the links to the libblas.so.3 and liblapack.so.3, right? That depends on whether there are compile-time optimizations. Considering that numpy has a compile-time switch for the library you want to build against rather than just using whatever is available and changing at runtime, and that specific changes needed to be made to numpy to support openblas, I would think that runtime switching is different than choosing a target at compile time.

-- To unsubscribe, e-mail: opensuse-packaging+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-packaging+owner@opensuse.org