README

# scan_mpi_decomp

xavier.lapillonne@meteoswiss.ch
Last edit: 12.05.2016

Run cosmo with various mpi decomposition

Contains script to run multiple configuration and get results. For a
description of the command line options : ./scanscript.py -h

Example:
- Run
./scanscript.py --exe=cosmo_gpu --data_dir=./cosmo-1 --np_s=118 --np_e=150 --npxy_min=8 --ncomp_mult=16

The runs will be performed in ./work/cosmo-1/run_[n]

- Get results
./get_scan_timing.py --scan_dir=work/cosmo-1 --sort

# Notes:
- The number of I/O node will be kept to the value in data_dir/INPUT_ORG
- On kesch one needs to manualy adapt the ntasks-per-node and ntasks-per-socket
values in the submit.kesch.slurm:
For 1 I/O task per node [ this is the default setting ]
 #SBATCH --ntasks-per-node=17
 #SBATCH --ntasks-per-socket=9
For 2 I/O tasks per node [this may not work when using multiple
node ]
 #SBATCH --ntasks-per-node=18
 #SBATCH --ntasks-per-socket=9