December 10th 2021

Last meeting: October 6th 2021

Outline

1. XRD-CT / ID15A updates
2. Full-field updates

Re-work the integrator software for distributing azimuthal integration.

• Improve usability
• Re-work output files layout to fit ID15A needs
• Automatic re-allocation of SLURM resources
• Tested on large collection of datasets

Some issues still to be addressed.

• Reading data is done at 1.1 GB/s
  • For ID15A pilatus detector (1475x1679), this means 110 frames per second
  • Bottleneck is LZ4 decompression - can certainly be sped up (up to a factor 2)
• Performing azimuthal integration is done at
  • 40-70 FPS for using CPU (10 cores/worker)
  • 300 FPS using GPU

So for now, we should target computing resources able to reach 110 FPS.

Updates on the nabu processing software

• Some fixes in the full-field pipeline (thanks Ludovic Broche, Benoit Cordonnier)
• Add support for tiff3D ("big tiff")
• Make nabu work on new gpid16axni machines (add support for Cuda 11)
• New sitching method for half-tomography
  • Ongoing quality assessment of this new method

Known issues

• Abysmal performances for loading EDF datasets. Tried with silx and fabio

Work in progress

• Helical tomography pipeline (Alessandro)