Intel® oneAPI Math Kernel Library
Ask questions and share information with other developers who use Intel® Math Kernel Library.
6998 Discussions

MKL DftiComputeBackwards with DFTI_NUMBER_OF_TRANSFORMS > 1 can produce different results

swalker
Employee
317 Views

I have a testcase that demonstrates DftiComputeBackwards producing slightly different results when calling in a loop vs setting DFTI_NUMBER_OF_TRANSFORMS to do multiple transforms in 1 pass. This is causing unexpected results for our use of MKL. For some reason the problem disappears when AVX512 mode is enabled. See reproducer testcase for details.

0 Kudos
1 Reply
VarshaS_Intel
Moderator
239 Views

Hi,


Thanks for posting in Intel Communities.


Based on this, and our discussion about creating a priority ticket if needed, I am going ahead and closing this case for now.

Please feel free to contact us further if you need any assistance from our side. 


Thanks & Regards,

Varsha


0 Kudos
Reply