Grid Experiments

Contains a few scripts to experiment with the memory layout of the icon grid

• icon_grid.py to transform the memory layout
• plotting.py to visualize the memory layout of a given icon mesh
• reduce_test.py to determine whether two given icon meshes are the same, up to a layout transform

Workflow to Transform an icon grid

Currently, only experiment ch_r04b09 is supported

• compile icon and generate the runscripts as usual
• in the icon root folder, clone this repo git clone git@github.com:dawn-ico/grid-experiments.git
• run the setup script cd grid-experiments && bash setup.sh. This copies the contents of /scratch/jenkins/icon/pool/data/ICON/mch/grids/ch_r04b09/ into a local pool folder called my_pool
• change the icon_data_rootFolder in exp.mch_ch_r04b09.run from the jenkins pool to the local pool, i.e. icon_data_rootFolder="/scratch/jenkins/icon/pool/data/ICON/" > icon_data_rootFolder="/scratch/mroeth/icon-test/grid-experiments/my_pool/data/ICON"
• use icon_grid.py to perform the desired layout transformation, e.g. icon_grid.py --row-major --fix-hole. This manipulates the icon grids in my_pool. Experiment exp.mch_ch_r04b09.run now uses the transformed grids.

NOTE probtest will only succeed if the option --fix-hole is used for both layouts to be tested. This is due to an icon bug.