dgemm_ vs. cblas_dgemm

dgemm_ vs. cblas_dgemm


I'm doing some performance benchmarks on Intel's mkl right now and I noticed some unexpected issues. When using dgemm_() function instead of cblas_dgemm() on the same matrix I get around 4 times fewer Gflop/s. It's the same either with the non-parallel and parallel version.

Did someone experience similiar things or could probably point me to a possible failure?


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