[Rtk-users] SLAB SIZE and performance improvements

[Gabriele Belotti]

Dear all,

I'm testing an inline implementation using RTK vs the offline rtkfdk.
Has anyone else experienced an unexpected reduction in recon/computation
time using a batch reconstruction approach with N projections being
processed together rather than processing every projection at collection?

As in, for a slab size of 16 I would expect the processing time to be at
most 16x faster than backprojecting a single projection and passing to the
next.

Do you think this is only due to memory transfer bottleneck in cpu to gpu,
or could there be other reasons? Some tuning done in the filters maybe?

Best,
Gabriele
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