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mkl_cbwr_set() not working as expected in 2020.1.217

Matthew_G_Intel1
Employee
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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!

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



Gennady_F_Intel
Moderator
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The thread is closing and we will no longer respond to this thread. If you require additional assistance from Intel, please start a new thread. Any further interaction in this thread will be considered community only.



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Matthew_G_Intel1
Employee
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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.

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