[Rtk-users] CUFFT error

[Simon Rit]

Hi,
>From this page <CUFFT_ALLOC_FAILED = 2, // cuFFT failed to allocate GPU or
CPU memory Read more at:
http://docs.nvidia.com/cuda/cufft/index.html#ixzz3hq6CLu9v Follow us:
@GPUComputing on Twitter | NVIDIA on Facebook>, you have

CUFFT_ALLOC_FAILED   = 2,  //  cuFFT failed to allocate GPU or CPU memory

This is not suprising that you have a GPU memory issue when decreasing the
spacing because a finer volume spacing might require  more rows of the
projections for the reconstruction and therefore you can end up with being
out of memory. Try processing one projection at a time with --subsetsize 1.
If it's still too large, you'll have to change your --dimension to process
a smaller volume in the y direction.
Simon

On Tue, Aug 4, 2015 at 10:49 AM, ghostcz <ghostcz at hotmail.com> wrote:

> Dear rtk users/developers,
>
> I was testing the rtkfdk.exe application.
> The program ran into an error and caught an exception saying:
> “
> itk::ExceptionObject (00000000002EEA60)
> Location: "unknown"
> File: C:/Users/liy/root/RTK/code/rtkCudaFFTRampImageFilter.cu
> Line: 97
> Description: itk::ERROR: CUFFT ERROR #2”
> To save you a trip to the documentation, Line: 97 is here:
> “
> if(fftDimension.z==1)
>     result = cufftPlan2d(&fftFwd, inputDimension.y, inputDimension.x,
> CUFFT_R2C);
>   else
>     result = cufftPlan3d(&fftFwd, inputDimension.z, inputDimension.y,
> inputDimension.x, CUFFT_R2C);
>   CUFFT_CHECK_ERROR(result);
> “
>
> This occurred when --spacing=0.04623, while the program works just fine if
> I use --spacing=0.05.
> Is there anyone can help me with this?
>
> Best regards,
> Louie
>
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>
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