Wrapped DGEMM

This code sample is calling DGEMM and there is no dependency on the LIBXSMM API as it only relies on LAPACK/BLAS interface. Two variants are linked when building the source code: (1) code which is dynamically linked against LAPACK/BLAS, (2) code which is linked using --wrap=symbol as possible when using a GNU GCC compatible tool chain. For more information, see the Call Wrapper section of the reference documentation.

The same (source-)code will execute in three flavors when running dgemm-test.sh: (1) code variant which is dynamically linked against the originally supplied LAPACK/BLAS library, (2) code variant which is linked using the wrapper mechanism of the GNU GCC tool chain, and (3) the first code but using the LD_PRELOAD mechanism (available under Linux).

Command Line Interface (CLI)

Optionally takes the number of repeated DGEMM calls
Shows the performance of the workload (wall time)