PDAF3_set_parallel

This page documents the routine PDAF3_set_parallel of PDAF. This routine was introduced with PDAF V3.0.

The routine PDAF3_set_parallel is called in init_parallel_pdaf to provide PDAF with the paralellization information.

The call to PDAF3_set_parallel has the following structure:

CALL PDAF_set_parallel(COMM_ensemble, COMM_model, COMM_filter, COMM_couple, &
               task_id, n_modeltasks, filterpe, &
               status_pdaf)

The required arguments are the following:

• COMM_ensemble: The communicator variable COMM_ensemble as initialized by init_parallel_pdaf.
• COMM_model: The communicator variable COMM_model as initialized by init_parallel_pdaf.
• COMM_filter: The communicator variable COMM_filter as initialized by init_parallel_pdaf.
• COMM_couple: The communicator variable COMM_couple as initialized by init_parallel_pdaf.
• task_id: The index of the model tasks as initialized by init_parallel_pdaf.
• n_modeltasks: The number of model tasks as defined before the call to init_parallel_pdaf.
• filterpe: A logical flag showing whether a process belongs to COMM_filter as initialized by init_parallel_pdaf. (Usually stored in the module mod_assimilation)
• status_pdaf: An integer used as status flag of PDAF. If status_pdaf is zero upon exit from the routine the hand-over of the parallelization information was successful. An error occurred for non-zero values.