Test case presentation
General information:
To obtain a representative case of a real astrophysical problem, we start from an evolved case, i.e. the code has already run (more than 24 hours in this case) and the code starts again from restart files located in a folder named necessarily "input", because the ramses executable is implemented this way (these restart files are unarchived in the "prepare.sh" phase).
The code cannot change the number of MPI processes of the initial simulation when it starts from a checkpoint/restart, so the number of processes is fixed.
For this case, we will use 4096 MPI processes, and we will need about 1.4GB of memory per MPI process. To simplify we will take 1 core per MPI process on machines with nodes with enough memory and we will depopulate when necessary. For example on Occigen/Broadwell node with 28 core per node, we will use 147 nodes to have aproximately 28 MPI tasks per node.
Some metrics :
cf. https://dci-gitlab.cines.fr/dci/abs/-/wikis/home :
- TGCC/Joliot Curie AMD:
- Jean-Zay-cpu/Cascade Lake nodes:
Other:
Test case designed by F. Bournaud, informations provided by F. Bournaud, integrated in abs by C. Jourdain.