File README.HPC.SUSE of Package openblas

openSUSE specific packaging
===========================

OpenBLAS provides optimized implementations of BLAS and LAPACK.
openSUSE provides two variants:
 * With OpenMP support
 * With threading support
The serial variant has been dropped. To run a program
which requires the serial version (ie. because it is
multi-threaded itself), either specify the environment
variable OMP_NUM_THREADS=1 or place a call to
  void openblas_set_num_threads(int num_threads);
in your program to limit the number of threads this library
uses to 1.

On x86 systems OpenBLAS uses dynamic architectures support, 
so it contains all CPU-related optimizations.

How to switch between the various BLAS/LAPACK implementations
=============================================================

The openmp and threaded variants may be installed in parallel.
To select which one to use please use the 'modules' command.