Appl (Psmile) calls :

Psmile_init_mpi1 (from prism_init)

collective calls (MPI_Allreduce,MPI_Bcast)

for proc in comm_global == for all procs (ie psmile + driver)

MPI_comm_dup MPI_COMM_WORLD comm_globalComm_global comm_trans

Driver calls :

Prismdrv_init_appl

collective calls (MPI_Allreduce,MPI_Bcast) for proc in comm_drv_global == for all procs

(ie psmile + driver)

MPI_comm_dup MPI_COMM_WORLD comm_drv_globalComm_drv_global comm_drv_trans

Proc 0 of driver has read scc file distribution by collective calls

MPI1 : MPI_COMM_WORLD contains all the procs : psmile+driver

Driver calls : Prismdrv_def_mpi_comm

Appl (Psmile) calls : Psmile_def_mpi_comm

key = 0 ; color = 0CALL MPI_Comm_Split (comm_drv_global, &color, key, comm_drv_local, id_err )

key = 0 ; color = Appl%sequence_numberCALL MPI_Comm_Split (comm_global, &color, key, Appl%com, id_err )

do index = 1, ig_nb_applkey = 0 ; color = indexCALL MPI_Comm_Split (comm_drv_global, &color, key, comm, id_err )

key = 0do index = 1, noApplicationIf (index = Appl%sequence_number) thencolor = indexelsecolor = MPI_undefinedendifCALL MPI_Comm_Split (comm_global, &color, key, comm, id_err )

Definition of comm_coupler between driver and one appl

Definition of comm_coupling(index)between driver and one appl = comm

Definition of the comm of 1 applDefinition of the comm of the driver

Driver calls :

Prismdrv_def_mpi_comm

Appl (Psmile) calls :

Psmile_def_mpi_comm

key = 0 ; color = MPI_undefinedCALL MPI_Comm_Split (comm_drv_global, &color, key, comm_psmile, id_err )

key = 0 ; color = 1CALL MPI_Comm_Split (comm_global, &color, key, comm_psmile, id_err )

Definition of the comm of all appl