https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/DFT-FORWARD-SCALE-do-not-work/m-p/1186027#M29596 <P>Hi,&nbsp;</P><P>I am using MKL DTFI APIs to do the FFT and&nbsp; I find the DftiSetValue API have some bugs on x64 system when I want to config the FFT scale. It does work well when I set the platform to the x86.</P><P>On the x64 system,&nbsp; I use&nbsp;DftiSetValue&nbsp; to config the DTFI_FORWARD_SCALE, and use&nbsp;DftiGetValue to read back the settings. I find the value which I read back is always very small, very close to 0. And the FFT result is wrong, the result is all 0. To config DFTI_BACKWARD_SCALE have the same problem.</P><P>If I don't set the&nbsp;DTFI_FORWARD_SCALE, the default value is 1, and everything is OK.</P><P>This only happens on the x64 platform. When I compile the same code on the x86, it is no error.</P><P>Do anyone have some suggestions?</P> Tue, 09 Jun 2020 10:59:03 GMT yu__yiming 2020-06-09T10:59:03Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/DFT-FORWARD-SCALE-do-not-work/m-p/1186027#M29596 <P>Hi,&nbsp;</P><P>I am using MKL DTFI APIs to do the FFT and&nbsp; I find the DftiSetValue API have some bugs on x64 system when I want to config the FFT scale. It does work well when I set the platform to the x86.</P><P>On the x64 system,&nbsp; I use&nbsp;DftiSetValue&nbsp; to config the DTFI_FORWARD_SCALE, and use&nbsp;DftiGetValue to read back the settings. I find the value which I read back is always very small, very close to 0. And the FFT result is wrong, the result is all 0. To config DFTI_BACKWARD_SCALE have the same problem.</P><P>If I don't set the&nbsp;DTFI_FORWARD_SCALE, the default value is 1, and everything is OK.</P><P>This only happens on the x64 platform. When I compile the same code on the x86, it is no error.</P><P>Do anyone have some suggestions?</P> Tue, 09 Jun 2020 10:59:03 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/DFT-FORWARD-SCALE-do-not-work/m-p/1186027#M29596 yu__yiming 2020-06-09T10:59:03Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/DFT-FORWARD-SCALE-do-not-work/m-p/1190308#M29703 <P>we are sorry, we missed this topic due to some problems caused by migration to the new platform.</P><P>this is not an expected issue and if you will give us the reproduced, we will check the cause of the issue.</P><P><BR /></P><BR /> Tue, 07 Jul 2020 15:41:55 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/DFT-FORWARD-SCALE-do-not-work/m-p/1190308#M29703 Gennady_F_Intel 2020-07-07T15:41:55Z