how to use parallel FFT verison with MKL

[afd_lml]

Hi, all,

I have a workstation with 24 cores, and Iwant toperformFFT in paralle with MKL.

Would anyone like to give me some help on how to do it ? thank you !

[Filippo_Spiga]

Quoting - afd.lml

Hi, all,

I have a workstation with 24 cores, and Iwant toperformFFT in paralle with MKL.

Would anyone like to give me some help on how to do it ? thank you !

Do you want to try the Cluster FFT set of routines or the multi-thread ones?

I'm in trouble with MKL parallel FFT routines because it seems that they don't work. I have posted yesterday about my problem (with a sample code extracted from the MKL manpages) and I'm waiting an answer. You can start to try with it (if it's work, obviously) ...

Cheers!

[Dmitry_B_Intel · Accepted solution]

Hi,

MKL does internal threading of FFTs automatically, where it can. You can limit the number of threads alloted for this by setting relevant environment variables (e.g. MKL_NUM_THREADS)or by calling specific functions (e.g. MKL_Set_Num_Threads). Details can be found in MKL User's Guide and MKL Reference Manual.

Thanks
Dima

[afd_lml]

Quoting - Dmitry Baksheev (Intel)

Hi,

MKL does internal threading of FFTs automatically, where it can. You can limit the number of threads alloted for this by setting relevant environment variables (e.g. MKL_NUM_THREADS)or by calling specific functions (e.g. MKL_Set_Num_Threads). Details can be found in MKL User's Guide and MKL Reference Manual.

Thanks
Dima

Thank you for your reply ! I will try.