Version 6 (modified by roche, 6 years ago) (diff) |
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Basic installations instructions
Installation of iLOVECLIM on obelix (LSCE)
To install iloveclim, open a terminal, go to the chosen directory, and type:
- To get the iLOVECLIM code with svn:
svn co svn+ssh://forge.ipsl.jussieu.fr/ipsl/forge/projets/ludus/svn/trunk iloveclim/.
- To load the modules:
module load netcdf
module load udunits
- To install everything:
./install_ludus.sh
You can then start the test run:
./bin/loveclim-new-run
If everything is ok it should have run.
Running iLOVECLIM
To start a run:
nohup ./bin/loveclim-new-run -l LH -n 500 -r 250 > run_LH &
starts a simulation called LH which lasts 500 years and writes restart files every 250 years, starting from the default initial conditions.
To see more options:
./bin/loveclim-new-run -h
OpenMP
As of version 758, there is a possibility to run with OpenMP activated. Just use the "-p" switch in the call e.g.:
./binloveclim-new-run -l LH -n 500 -r 250 -p
this will by default use all cores available on the given machine.
The expected performance increase is of about 40-50% on 4 cores, slightly more with carbon cycle activated, at time of writing (2017-11-30).
An example of the comparative performance is displayed below:
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added by roche 6 years ago.
OpenMP test results on the obelix cluster
- Screenshot_2017-12-13_15-40-33.png (139.2 KB) - added by roche 6 years ago.
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