function fft() sometimes fails to calculate result

[ellocco]

Dear Sir or Madam!

Please have a look at:

https://github.com/oneapi-src/oneMKL/issues/222#issuecomment-1231785743

Regards,

Stefan

[ShanmukhS_Intel]

Hi Stefan,

Thank you for posting on Intel Communities.

We would like to request you kindly post your query details here so that it would be helpful for other users with a similar issue.

Best Regards,

Shanmukh.SS

[ellocco]

Hi Shanmukh,

thanks for your response all the details are given in the thread above.

It took me quite some time and a couple of e-mails to find this forum here.

Beside the link above you might also check:
JuliaMath/FFTW.jl#250
and
https://discourse.julialang.org/t/comparison-of-different-fft-implementations/86021/2

Problem:

At least with 47499754 points the function fft() fails.

Kindest regards,

Stefan

[ShanmukhS_Intel]

Hi,

We are looking into the details in the links shared by you. In the meantime, it would be good if you could share with us a sample reproducer and steps(if any) so that we could guide you in getting the issue resolved.

Best Regards,

Shanmukh.SS

[ellocco]

Hi Shanmukh!

Sample reproducing code is given in the links I posted here.

Best Regards,

Stefan

[ShanmukhS_Intel]

Hi,

Could you please share let us know your oneAPI environment details?

Best Regards,

Shanmukh.SS

[ellocco]

Hi Shanmukh!

Thanks for your kind reply! Have you checked the links that I have provided?

To be honest, I do not know what is still unknown. Do you have a more specific question?

What do you mean by "oneAPI environment"?

Kind regards,

Stefan

[Hsbsh]

Interesting that "If I use rfft() instead of fft() the fft-algorithm can handle 47499754 points, even if I turn on the MKL".

[ShanmukhS_Intel]

Hi Ellocco,

Apologies for the delay in response. We have gone through the links shared. However, we are facing issues while running the code. Attached the screenshot for your reference. 

Could you please let us know if any dependencies need to be installed?  and we would like to request you share the steps in code execution, as it helps reproduce the issue and address the same.

Best regards,

Shanmukh.SS

[ellocco]

Dear Shanmukh,

using PlotlyJs

is a part of a Julia script.

If you do not want to plot you can skip the plot function.

Packages under Julia can be installed via Pkg.

Best regards,

Stefan

[Hsbsh]

https://www.google.com/search?q=plotlyjs

[ShanmukhS_Intel]

Hi Stefan,

Thank you for sharing the details.

It took me a while in getting the dependencies installed and set up the environment to reproduce the issue. We are able to reproduce your issue at our end and we have informed the development team regarding the same.

Best Regards,

Shanmukh.SS

[ShanmukhS_Intel]

Hi,

Thank you for your patience. The issue raised by you has been targeted to be fixed in version 2024.1 and will be released in the coming months. If the issue persists with the new release, please start a new discussion thread in the community forum and we’ll investigate it further. Please check the release notes for upcoming features and bug fixes.

Best Regards,

Shanmukh.SS