[Rtk-users] No Performance Change After Modifying RTK_CUDA_PROJECTIONS_SLAB_SIZE

[Anshika G]

Hi everyone,

While going through the RTK installation documentation, I came across the
RTK_CUDA_PROJECTIONS_SLAB_SIZE parameter, which can be configured during the
CMake process. This parameter defines the number of projections processed
simultaneously during CUDA processing, with the default value set to 16.

My understanding is that increasing this value should, in theory, reduce the
overall runtime of the FDK reconstruction when using CUDA. However, I tried
increasing it to 32 and 64, but observed no noticeable improvement in
runtime. I'm using an NVIDIA Quadro RTX 6000 GPU.

 

Has anyone else experimented with this parameter or can provide insight into
why changing the value doesn't seem to affect performance? 

Any suggestions or guidance would be appreciated!

 

Thank you!

 

 

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