[Rtk-users] [EXTERNAL] Help with CudaForwardProjectionImageFilter

[Rahman, Obaid]

Hi Simon,

I have installed the latest openRTK, and the problem has been resolved.
I can reconstruct volumes of 1200X1200X1200 which is more than 2^31-1.

Do you know what is the max recon size I can get?
Thanks.

Best,
Obaid

> On Apr 29, 2024, at 1:50 PM, Rahman, Obaid <rahmano at ornl.gov> wrote:
> 
> Hi Simon,
> 
> Thank you again for the prompt reply and for catching the issue.
> I have opened a new issue <https://github.com/RTKConsortium/RTK/issues/594> on Github.
> Thanks!
> 
> Best,
> Obaid
> 
>> On Apr 29, 2024, at 11:40 AM, Simon Rit <simon.rit at creatis.insa-lyon.fr> wrote:
>> 
>> Thanks. I think I understood the issue. Your code indicates this line for the initial error:
>> https://github.com/SimonRit/RTK/blob/86d1e83d5341a6a7a85400d550d4759b46653522/src/rtkCudaUtilities.cu#L115 <https://urldefense.us/v2/url?u=https-3A__github.com_SimonRit_RTK_blob_86d1e83d5341a6a7a85400d550d4759b46653522_src_rtkCudaUtilities.cu-23L115&d=DwMFaQ&c=v4IIwRuZAmwupIjowmMWUmLasxPEgYsgNI-O7C4ViYc&r=J7uT21mkGp7aMwIrHQkTLGwy72wKx_bOB0IkoGp__bQ&m=dX-bgc0aI76oeRMh3MT7_0hyVzTmxOdz7j3ilY3C85ebAPukM8PNxaaKOMC36gHw&s=lQAUBe9IGLcHtcPqqiWGjq1BYkPWmQBQsyqrbZGZssA&e=>
>> The numel variable two lines above is computed as an int, which max value (2^31-1=2147483647) is below 1264*1356*1356=2324162304. Larger GPU memory comes with new bugs! Can you report your issue on github and I'll fix this quickly?
>> Thanks in advance,
>> Simon
> 

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