mkl_cbwr_set() not working as expected in 2020.1.217

[Matthew_G_Intel1]

In my code, I set ::mkl_cbwr_set(MKL_CBWR_AVX);

With MKL 2020.1.217, I found that MKL FFTs produce different results on CoffeeLake and RocketLake CPUs.

I do not see this issue with MKL 2021.3.0.

Question 1: Is this a known issue in MKL 2020.1.217?

Question 2: What version of MKL did this issue first occur in?

Question 3: What version of MKL was it fixed in?

Thanks!

[Gennady_F_Intel]

Matt, the problem has been fixed in MKL 2020 update 4.

[Gennady_F_Intel]

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[Matthew_G_Intel1]

Just as reference to anybody looking at this topic, we found these inconsistent CNR results on IceLake & RocketLake CPUs, but not on SkyLake, KabyLake, or CoffeeLake.

Affected MKL versions seem to start with 2020 Gold, and was fixed in 2020u4 as Gennady mentioned above.