How do I make MATLAB use the "MKL_CBWR" environment variable as the CNR branch?

I would like to change the CNR branch from "AVX2" to "COMPATIBLE". I set a new environment variable as such:

MKL_CBWR = COMPATIBLE

This environment variable is detected by MATLAB, which is confirmed with the following command:

>> getenv('MKL_CBWR')

ans =  'COMPATIBLE'

However, the CNR branch is not changed, which is confirmed by this command:

>> version -blas

ans =  'Intel(R) oneAPI Math Kernel Library Version 2021.3-Product Build 20220428 for Intel(R) 64 architecture applications (CNR branch AVX2)'

How do I make MATLAB use the "MKL_CBWR" environment variable as the CNR branch?

Answer 1

[MathWorks Support Team]

MATLAB does not use the "MKL_CBWR" environment variable unless "MATLAB_DISABLE_CBWR" is also set to 1.

Therefore, create another environment variables as such:

MATLAB_DISABLE_CBWR = 1

Then, restart MATLAB.