How to use Intel MKL libraries with Octave in Manjaro?

I have installed the intel-mkl package in Manjaro, but it did not seem to speed up diagonalization of a 1000x1000 matrix in GNU Octave (I measured with tic; toc). Probably Octave is using the default blas package.

  1. How to know which blas package Octave is Using?
  2. How to make Octave use Intel MKL libraries?

I am using fully updated version of Manjaro KDE.

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