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ParaTAXIS

PARAllel Tracer for Arbitrary X-ray Interaction and Scattering

This is a simulation framework for X-Ray Tracing with libPMacc. The code structure is almost identical to PIConGPU (https://github.com/ComputationalRadiationPhysics/picongpu) so most of the wiki entries apply here too.

The code uses C++11 and CUDA, so you need conforming compilers.

##Quickstart:

The code can be configured and compiled as it is and will run a basic example. But you mainly want to configure it yourself. This can be done by creating or modifying *.param files. Those are located in include/simulation_defines/param. You could modify those directly but it is better to use the override mechanism provided by the project. This allows you to create a folder where you place the param-files that will be used instead of the original ones:

  • Use one of the examples in the examples folder as a starting point or create a new folder to start from scratch. Create a folder include/simulation_defines/param inside it, and copy the param-files you want to modify from the main repository.
  • Adjust the parameters to your requirements. Everything must be valid C++ but often you only need to change numbers or assignments as documented inside the files.
  • Call ./compileExampleSet.sh <src_dir> <dest_dir> to configure, compile and install your configuration into <dest_dir>. This will also copy all the unchanged simulation_defines files into that folder for later reference
  • Now change into that folder (cd <dest_dir>) and execute PIConGPUs tbg tool (best to have it in your PATH) like tbg -s bash -c submit/0001gpus.cfg -t submit/bash/bash_mpirun.tpl <runOutputDir> to run it. You may also want to adjust the cfg-file to use the correct runtime parameters. Note: You can copy on of the cfg.in from on of the examples into your example folder and adjust it just like the param-files.

Compile suite

There is an automated compile suite that can be used to compile one or multiple examples. Compiling all examples can help to verify that a change does not break existing code. Please refer to the help text of each individual script (-h or --help) for detailed explanations of the options

  • buildSystem/runTests.py: Main script for running test cases
    Usage: buildSystem/runTests.py -e <src_dir> -o <dest_dir> [other options]
    For running all tests of all examples use for example: TBG_SUBMIT=qsub TBG_TPLFILE=submit/hypnos-hzdr/k20_profile.tpl buildSystem/runTests.py -e ./examples -o $HOME/buildTest --all
    Note: You can limit this to to compile-tests only (no runtime tests) with --compile-only. The script requires Python3 and YAML support. Some of the test-cases additionally need HDF5 and NumPy libraries.

  • configureExample.sh: Configures an example into a build directory
    Usage: ./configureExample.sh <src_dir> <dest_dir>
    You can use -t <num> to use pre-defined cmake flags and/or -c <flag> to define additional ones

  • compileExampleSet.sh: Executes configureExample.sh and also calls make install from withing the build directory
    Usage: Same as configureExample.sh

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