topic Thank you. I am able to in Software Tuning, Performance Optimization & Platform Monitoring

MKL Library: AVX vs SSE

Animesh_J_ — Mon, 18 Apr 2016 21:43:58 GMT

Hi,

I want to measure the performance difference between SSE2 and AVX implementations for a neural network application. I am using Intel MKL to perform the BLAS calculations so that I have the most optimized implementation.

Is there anyway to instruct the MKL to release only SSE2 code even if machine supports AVX2. I know AVX2 will mostly perform better than SSE2. But I want to quantify that difference.

Regards,

Animesh Jain

Mkl conditional numerical

TimP — Wed, 20 Apr 2016 14:43:43 GMT

Mkl conditional numerical reproducibility offers options which should take care of this. It has been discussed several times on mkl forum.

Thank you. I am able to

Animesh_J_ — Wed, 20 Apr 2016 15:46:00 GMT

Thank you. I am able to dispatch code variants with different SIMD extensions by using the following environment variables - MKL_CBWR, MKL_NUM_THREADS.