blas/lapack parallelism

[Patrick Dupre]

Hello,

Are blas/lapack running in parallel by default?
I have openmp installed
Do I need to recompile ?

Thanks

===========================================================================
 Patrick DUPRÉ                                 | | email: [e-mail]
 Laboratoire interdisciplinaire Carnot de Bourgogne
 9 Avenue Alain Savary, BP 47870, 21078 DIJON Cedex FRANCE
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[George N. White III]

On Fri, 28 May 2021 at 12:30, Patrick Dupre  wrote:
> Hello,
>
> Are blas/lapack running in parallel by default?
> I have openmp installed
> Do I need to recompile ?

I assume you want to improve performance of some computation.  Many
computational packages have been developed and testing with a
particular BLAS implementation but may only document the Debian/Ubuntu
alternatives mechanism.

"dnf seach blas" will show you many options, including openblas and blis.
The flexiblas package should allow you to change the choice of BLAS
library at run time <
https://fedoraproject.org/wiki/Changes/FlexiBLAS_as_BLAS/LAPACK_manager%3E

https://loveshack.fedorapeople.org/blas-subversion.html is old, but does
mention some of the issues.