[Rtk-users] CUDA displaced detector filter failure

[Simon Rit]

Hi Chao,
Thanks for the report, it's new so  we might have left special cases
behind... sorry. Is this something that occurs when launching rtkfdk,
rtkwangdisplaceddetectorweighting or one of your own applications?
It would be very useful if you could manage to reproduce this with a set of
command lines that would simulate data first and then apply the weighting,
similar to what's here <http://wiki.openrtk.org/index.php/RTK/Scripts/FDK>
for example.
Regards,
Simon

On Fri, Oct 10, 2014 at 10:58 AM, Chao Wu <wuchao04 at gmail.com> wrote:

> Hi all,
>
> I am trying the new cuda displaced detector filter but
> got cudaErrorLaunchFailure. This error was returned by cudaFree(dev_geom)
> at the end of the code, but since this error type is not registered with
> cudaFree(), it would be from previous, asynchronous launches. By
> using cudaDeviceSynchronize() I found the error coming after calling
> kernel_displaced_weight<<<...>>>(...).
>
> One interesting thing is that when the error occurs depends on the number
> of projections processed at once (controlled by the --subset=N option of
> rtkfdk.exe for example). If I use subset=1 then it fails right with the
> first projection; if subset=2 it fails at the 16th run when processing the
> 31st and 32nd projections; if subset=4, at the 14th run; if subset=16
> (default), at the 6th run; and so on.
>
> The input region of each projection is about 1944x200 (the 2nd dimension
> differs a little bit of course) and the output region is then about
> 3888x200. A GTX580 card is used.
>
> Any suggestions and comments on this? Thanks.
>
> Regards,
> Chao
>
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