[Rtk-users] CUFFT error

[Simon Rit]

Then I don't see what else could be the problem. If it's a GPU memory
issue, you'll see it by adding the following command

{

    size_t free, used, total;
    cudaMemGetInfo(&free, &total);
    used = total - free;

    std::cout << std::endl;
    std::cout << "------------- Device memory usage ------------" <<
std::endl;
    std::cout << "Total memory = " << total << " bytes" << std::endl;
    std::cout << "Free memory = " << free << " bytes" << std::endl;
    std::cout << "Used memory = " << used << " bytes" << std::endl;
    std::cout << "Used memory = " << (used * 100.0 / total) << "%" <<
std::endl;
    std::cout << "----------------------------------------------" <<
std::endl;
    std::cout << std::endl;
  }

before the crashing command. If the memory is the issue, then I'm not sure
I understand why either, I quite agree with your comments. If it's not a
memory issue, then I don't know what's the problem...
Simon

On Tue, Aug 4, 2015 at 1:05 PM, ghostcz <ghostcz at hotmail.com> wrote:

> Thank you.
> I kept the dimension to the same value. I think reducing the spacing will
> need less rows in the projections, because the physical length will reduce
> with the spacing.
> Interestingly, it also works if I use 0.0462 instead of 0.04623 as spacing.
> Yes, I use –subsetsize=1 and –division=2 while –lowmem enabled. The origin
> is always updated with –0.5*spacing*(size-1);
>
> Best regards,
> Louie
>
> *From:* Simon Rit <simon.rit at creatis.insa-lyon.fr>
> *Sent:* Tuesday, August 04, 2015 12:09 PM
> *To:* ghostcz <ghostcz at hotmail.com>
> *Cc:* rtk-users at public.kitware.com
> *Subject:* Re: [Rtk-users] CUFFT error
>
> Hi,
> From this page, 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
>>
>> _______________________________________________
>> Rtk-users mailing list
>> Rtk-users at public.kitware.com
>> http://public.kitware.com/mailman/listinfo/rtk-users
>>
>>
>
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