Parallel implementations of Shallow Water Equations based on the teaching code(https://github.com/TUM-I5/SWE).

The documentation is available in the Wiki

• CMake >= 3.10
• NetCDF
• OpenMP
• HPX >= 1.4 (https://github.com/STEllAR-GROUP/hpx)
• Charm++ (https://github.com/UIUC-PPL/charm)
• UPC++ >= 2020.3.0 (https://bitbucket.org/berkeleylab/upcxx)
• ASAGI (only required for usage with geographic scenarios) (https://github.com/TUM-I5/ASAGI)
• Chameleon (https://github.com/chameleon-hpc/chameleon)

1. Clone the repository with following command:
   git clone --recursive
2. Checkout the sc_paw-atm_workshop :
   git checkout tags/sc_paw-atm_workshop -b master

1. Create build directory
   mkdir build && cd build
2. Set necessary environment variables
   UPC++:
   export UPCXX_PATH=\path\to\upcxx
   Chameleon:
   export CHAMELEON_PATH=\path\to\chameleon HPX:
   export HPX_PATH=\path\to\hpx\
3. Specify cmake targets and compile options
   cmake -DBUILD_SWE_MPIOVERDECOMP=On\ -DBUILD_SWE_MPIOVERDECOMPTASKING=On\ \-DBUILD_SWE_MPI=On \-DBUILD_SWE_UPCXX=On \-DBUILD_SWE_CHAMELEON=On \-DBUILD_SWE_HPX=On ..
   For a complete list of configurable options call
   cmake -LAH ..
4. Compile targets
   make or cmake --build . --target swe_benchmark_<target>

Unfortunately Charm++ still requires the old scons build system.

1. Set environment variable
   export CHARM_PATH=\path\to\charm
2. Compile using scons
   scons writeNetCDF=True compiler=intel solver=hybrid openmp=false parallelization=charm asagi=false copyenv=true vectorize=true

Note, that the below provided examples may vary depending on the system architecture and configuration of the frameworks. The examples execute the compiled scenario with a 2048x2048 cell resolution,80 seconds simulation duration, 20 checkpoints, global time stepping and file output enabled.

• MPI:
  mpirun -np 56 ./build/swe_benchmark_mpi --simulation-duration 80 --checkpoint-count 20 --resolution-horizontal 2048 --resolution-vertical 2048 --output-basepath ./output/mpi_gts --local-timestepping 0 --write 1
• UPC++:
  $UPCXX_PATH/bin/upcxx-run -np 56 ./build/swe_benchmark_upcxx --simulation-duration 80 --checkpoint-count 20 --resolution-horizontal 2048 --resolution-vertical 2048 --output-basepath ./output/upcxx_gts --local-timestepping 0 --write 1
• Charm++:
  $CHARM_PATH/bin/charmrun +p56 ./build/SWE_intel_release_charm_hybrid_vec --simulation-duration 80 --checkpoint-count 20 --resolution-horizontal 2048 --resolution-vertical 2048 --output-basepath ./output/charm_gts --local-timestepping 0 --write 1 --chares 56
• Chameleon:
  I_MPI_PIN=1 I_MPI_PIN_DOMAIN=auto OMP_NUM_THREADS=27 OMP_PLACES=cores OMP_PROC_BIND=close mpirun -np 56 ./build/swe_benchmark_upcxx --simulation-duration 80 --checkpoint-count 20 --resolution-horizontal 2048 --resolution-vertical 2048 --output-basepath ./output/chameleon_gts --local-timestepping 0 --write 1 --blocks 28
• HPX:
  mpirun -np 56 ./build/swe_benchmark_hpx --simulation-duration 80 --checkpoint-count 20 --resolution-horizontal 2048 --resolution-vertical 2048 --output-basepath ./output/hpx_gts --local-timestepping 0 --write 1 --blocks 28

More examples of execution scripts can be found at https://github.com/TUM-I5/SWE-PPM/tree/master/jobs

• Michael Bader
• Martin Bogusz
• Philipp Samfaß
• Alexander Pöppl

SWE is release unter GPLv3 (see gpl.txt)