Up to Specific issues in real coupled models
Hi Laure, I have just downloaded OASIS3-MCT and implemented it but I have a problem with the partition definitions. The wave model gathers the data on the master process so I use a serial decomposition for the master and I define ig_paral=0 for the other processes but I get locked in the routine defining the partition for the processes where ig_paral=0. Do you have an idea of what is wrong ? Thanks, Regards, Francois-Xavier
Hi Francois-Xavier, In fact when only one process or a subset of processes are coupling, you must use the routine oasis_create_oasis_create_couplcomm (see the User Guide https://oasis.cerfacs.fr/wp-content/uploads/sites/114/2021/02/GLOBC-Valcke_TR_OASIS3-MCT_2.0_2013.pdf, section 2.2.3). The routine oasis_create_couplcomm is defined as follow : oasis_create_couplcomm(ipcl, local_comm, coupl_comm, kinfo) with in your case icpl=1 for the master process and ipcl=MPI_UNDEFINED for the others processes that are not coupling. local_comm is the communicator over all the processes (and returned by oasis_get_localcomm) and coupl_comm is the communicator gathering only the processes that are coupling (the master process in your case). In OASIS3-MCT_2.0, the processes that do not participate to the coupling must call the following collective routines: CALL oasis_init_comp CALL oasis_get_localcomm CALL oasis_create_couplcomm CALL oasis_def_partition ( with ig_paral=0 ) CALL oasis_def_var ( ... ) CALL oasis_enddef ( ... ) CALL oasis_terminate ( ... ) There is an example pes_coupling that could help you : see the conversation "Simple code for oasis_create_couplcomm : https://www.cerfacs.fr/site-oasis/forum/oa_main.php?c=92" for more details on how to download it. Best regards, Laure
