[Scilab-users] ?==?utf-8?q? Use of optimized ATLAS binary with Scilab (on?==?utf-8?q? linux)

[Clément David]

Hello Antoine, Nikolay,

The selection of a much performant BLAS / LAPACK implementation is very system-dependent and I don't
want to maintain something not standard / widely deployed on Linux distributions. As a reference,
the current Fedora status is to link against the library used at build-time [1]. Nicolay pointed on
a similar link for Debian which use /etc/alternatives to let the user select a library.

Currently, it is still possible to enforce a specific BLAS/LAPACK library using LD_PRELOAD
(LD_PRELOAD=/usr/lib64/libopenblaso.so.0 bin/scilab for example). However it could not be enforced
within Scilab stock version even it is known [2] that Atlas or OpenBLAS will slightly improve Scilab
speed as it is highly system / user dependent choice.

[1]: https://pagure.io/packaging-committee/issue/588
[2]: https://wiki.scilab.org/Linalg%20performances

Thanks,

--
Clément

Le mardi 11 avril 2017 à 14:34 +0200, Antoine Monmayrant a écrit :
> Hello Nikolay,
> 
> Thanks for the tip.
> Saddly, the version in the repositories are too old for me.
> I assume that using update-alternatives on libblas & others will not change my problem of scilab
> not finding the installed libraries.
> There might be a LD_LIBRARY_PATH to set somewhere....
> 
> Thanks anyway,
> 
> Antoine
> 
> 
> Le Mardi, Avril 11, 2017 14:22 CEST, Nikolay Strelkov <n.strelkov at gmail.com> a écrit: 
>  
> > Dear Antoine!
> > 
> > On Ubuntu and Debian you can install Scilab from official repositories and
> > then switch libblas or liblapack to ATLAS with
> > update-alternatives (see
> > https://wiki.debian.org/DebianScience/LinearAlgebraLibraries).
> > Hope this helps.
> > 
> > --
> > 
> > *With best regards,Ph.D., *
> > 
> > 
> > *associate professor at MPEI
> > <http://mpei.ru/lang/en/Pages/default.aspx>,IEEE member,maintainer
> > of Mathieu functions toolbox for Scilab
> > <http://atoms.scilab.org/toolboxes/Mathieu/>,**Nikolay Strelkov.*
> > 
> > 11 апр. 2017 г. 14:59 пользователь "Antoine Monmayrant" <
> > antoine.monmayrant at laas.fr> написал:
> > 
> > > Hi all,
> > > 
> > > I wonder whether any of you has tried to use optimized ATLAS binary
> > > instead of the default one provided by Scilab (in the SCI/lib/thirdparty).
> > > I read that it can greatly increase Scilab speed for some linear algebra
> > > computations (see Programming in Scilab by Michaël Baudin, p135, available
> > > here: http://forge.scilab.org/index.php/p/docprogscilab/downloads/).
> > > I tried to remove libblas from the SCI subfolders, but then it seems that
> > > Scilab fails to find the library installed on my machine.
> > > Any tips?
> > > 
> > > Antoine
> > > 
> > > _______________________________________________
> > > users mailing list
> > > users at lists.scilab.org
> > > http://lists.scilab.org/mailman/listinfo/users
> > > 
> 
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