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pmc_handle_communicator_mod.f90 @ 4896

Last change on this file since 4896 was 4883, checked in by hellstea, 4 years ago
user switch for particle coupling added
Property svn:keywords set to `Id`
File size: 21.8 KB

Rev	Line
[2696]	1	!> @file pmc_handle_communicator_mod.f90
[4649]	2	!--------------------------------------------------------------------------------------------------!
[2696]	3	! This file is part of the PALM model system.
[1762]	4	!
[4649]	5	! PALM is free software: you can redistribute it and/or modify it under the terms of the GNU General
	6	! Public License as published by the Free Software Foundation, either version 3 of the License, or
	7	! (at your option) any later version.
[1762]	8	!
[4649]	9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
	10	! implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
	11	! Public License for more details.
[1762]	12	!
[4649]	13	! You should have received a copy of the GNU General Public License along with PALM. If not, see
	14	! <http://www.gnu.org/licenses/>.
[1762]	15	!
[4828]	16	! Copyright 1997-2021 Leibniz Universitaet Hannover
[4649]	17	!--------------------------------------------------------------------------------------------------!
[1762]	18	!
[4649]	19	!
[1762]	20	! Current revisions:
[4649]	21	! -----------------
[4629]	22	!
	23	!
[1792]	24	! Former revisions:
	25	! -----------------
	26	! $Id: pmc_handle_communicator_mod.f90 4883 2021-02-23 16:32:41Z raasch $
[4883]	27	! User switch for particle coupling added
	28	!
	29	! 4843 2021-01-15 15:22:11Z raasch
[4843]	30	! local namelist parameter added to switch off the module although the respective module namelist
	31	! appears in the namelist file
	32	!
	33	! 4828 2021-01-05 11:21:41Z Giersch
[4771]	34	! Canopy-restricted anterpolation introduced. New namelist parameter anterpolation_starting_height
	35	! introduced for controlling canopy-restricted anterpolation.
	36	!
	37	! 4650 2020-08-25 14:35:50Z raasch
[4650]	38	! bugfix for r4649
	39	!
	40	! 4649 2020-08-25 12:11:17Z raasch
[4649]	41	! File re-formatted to follow the PALM coding standard
	42	!
	43	!
	44	! 4629 2020-07-29 09:37:56Z raasch
	45	! Support for MPI Fortran77 interface (mpif.h) removed
	46	!
[4629]	47	! 4360 2020-01-07 11:25:50Z suehring
[4182]	48	! Corrected "Former revisions" section
[4649]	49	!
[4182]	50	! 3888 2019-04-12 09:18:10Z hellstea
[3888]	51	! Missing MPI_BCAST of anterpolation_buffer_width added.
[4649]	52	!
[3888]	53	! 3885 2019-04-11 11:29:34Z kanani
[4649]	54	! Changes related to global restructuring of location messages and introduction of additional debug
	55	! messages
	56	!
[3885]	57	! 3819 2019-03-27 11:01:36Z hellstea
[4649]	58	! Adjustable anterpolation buffer introduced on all nest boundaries, it is controlled by the new
	59	! nesting_parameters parameter anterpolation_buffer_width.
	60	!
[3819]	61	! 3655 2019-01-07 16:51:22Z knoop
[2932]	62	! nestpar renamed to nesting_parameters
[4649]	63	!
[4182]	64	! 1762 2016-02-25 12:31:13Z hellstea
	65	! Initial revision by K. Ketelsen
[1792]	66	!
[1762]	67	! Description:
	68	! ------------
[1764]	69	! Handle MPI communicator in PALM model coupler
[4649]	70	!--------------------------------------------------------------------------------------------------!
[2696]	71	MODULE PMC_handle_communicator
[1764]	72	#if defined( __parallel )
	73	USE kinds
[1762]	74
[1764]	75	USE MPI
[1762]	76
[4649]	77	USE pmc_general, &
	78	ONLY: pmc_max_models, &
	79	pmc_status_error, &
	80	pmc_status_ok
	81
	82
	83	USE control_parameters, &
[1933]	84	ONLY: message_string
[1762]	85
[1900]	86	IMPLICIT NONE
[1762]	87
[4650]	88	!
	89	!-- ATTENTION: Do not change the order of variable declarations in the following TYPE definition,
	90	!-- because the order must follow the order in which the layout data is given in the NAMELIST file.
[1900]	91	TYPE pmc_layout
[1762]	92
[4649]	93	CHARACTER(LEN=32) :: name !<
[1762]	94
[4649]	95	INTEGER :: id !<
[4650]	96	INTEGER :: parent_id !<
[4649]	97	INTEGER :: npe_total !<
[1762]	98
[1900]	99	REAL(wp) :: lower_left_x !<
	100	REAL(wp) :: lower_left_y !<
[1762]	101
[1900]	102	END TYPE pmc_layout
[1764]	103
[4649]	104	PUBLIC pmc_status_ok, pmc_status_error !<
[1764]	105
[2599]	106	INTEGER, PARAMETER, PUBLIC :: pmc_error_npes = 1 !< illegal number of processes
[2932]	107	INTEGER, PARAMETER, PUBLIC :: pmc_namelist_error = 2 !< error(s) in nesting_parameters namelist
[1900]	108	INTEGER, PARAMETER, PUBLIC :: pmc_no_namelist_found = 3 !< no couple layout namelist found
[1764]	109
[2801]	110	INTEGER :: m_my_cpl_id !< coupler id of this model
[4649]	111	INTEGER :: m_ncpl !< number of couplers given in nesting_parameters namelist
[1900]	112	INTEGER :: m_parent_id !< coupler id of parent of this model
[4649]	113	INTEGER :: m_world_comm !< global nesting communicator
[1762]	114
[2801]	115	TYPE(pmc_layout), PUBLIC, DIMENSION(pmc_max_models) :: m_couplers !< information of all couplers
[1762]	116
[1900]	117	INTEGER, PUBLIC :: m_model_comm !< communicator of this model
[4649]	118	INTEGER, PUBLIC :: m_model_npes !<
	119	INTEGER, PUBLIC :: m_model_rank !<
[1933]	120	INTEGER, PUBLIC :: m_to_parent_comm !< communicator to the parent
[1900]	121	INTEGER, PUBLIC :: m_world_rank !<
[4649]	122	INTEGER :: m_parent_remote_size !< number of processes in the parent model
[1900]	123	INTEGER :: m_world_npes !<
[2599]	124	INTEGER :: peer_comm !< peer_communicator for inter communicators
[1791]	125
[4649]	126	INTEGER, DIMENSION(pmc_max_models), PUBLIC :: m_to_child_comm !< communicator to the child(ren)
	127	INTEGER, DIMENSION(:), POINTER, PUBLIC :: pmc_parent_for_child !<
[1762]	128
	129
[4649]	130	INTERFACE pmc_get_model_info
	131	MODULE PROCEDURE pmc_get_model_info
	132	END INTERFACE pmc_get_model_info
	133
[1900]	134	INTERFACE pmc_is_rootmodel
	135	MODULE PROCEDURE pmc_is_rootmodel
	136	END INTERFACE pmc_is_rootmodel
[1762]	137
[4649]	138	PUBLIC pmc_get_model_info, pmc_init_model, pmc_is_rootmodel !<
[1762]	139
	140
[4649]	141
[1764]	142	CONTAINS
[1762]	143
[4649]	144
	145	!--------------------------------------------------------------------------------------------------!
	146	! Description:
	147	! ------------
	148	!> @Todo: Missing subroutine description.
	149	!--------------------------------------------------------------------------------------------------!
	150	SUBROUTINE pmc_init_model( comm, nesting_datatransfer_mode, nesting_mode, &
[4883]	151	anterpolation_buffer_width, anterpolation_starting_height, &
	152	particle_coupling, pmc_status )
[1762]	153
[4649]	154	USE control_parameters, &
[1900]	155	ONLY: message_string
[1764]	156
[4649]	157	USE pegrid, &
[1900]	158	ONLY: myid
[1764]	159
[4883]	160	IMPLICIT NONE
[1764]	161
[4649]	162	CHARACTER(LEN=7), INTENT(INOUT) :: nesting_datatransfer_mode !<
[2696]	163	CHARACTER(LEN=8), INTENT(INOUT) :: nesting_mode !<
[1764]	164
[4649]	165	INTEGER, INTENT(INOUT) :: anterpolation_buffer_width !< Boundary buffer width for anterpolation
	166	INTEGER, INTENT(INOUT) :: comm !<
	167	INTEGER, INTENT(INOUT) :: pmc_status !<
[1764]	168
[4771]	169	REAL(wp), INTENT(INOUT) :: anterpolation_starting_height !< steering parameter for canopy restricted anterpolation
[4883]	170	LOGICAL, INTENT(INOUT) :: particle_coupling !< switch for particle coupling (default .TRUE.)
[4771]	171
[1933]	172	INTEGER :: childcount !<
[1900]	173	INTEGER :: i !<
	174	INTEGER :: ierr !<
	175	INTEGER :: istat !<
	176	INTEGER :: m_my_cpl_rank !<
	177	INTEGER :: tag !<
[1764]	178
[4649]	179	INTEGER, DIMENSION(pmc_max_models) :: activeparent !< I am active parent for this child ID
	180	INTEGER, DIMENSION(pmc_max_models+1) :: start_pe !<
[1762]	181
[1900]	182	pmc_status = pmc_status_ok
	183	comm = -1
	184	m_world_comm = MPI_COMM_WORLD
	185	m_my_cpl_id = -1
[1933]	186	childcount = 0
	187	activeparent = -1
[1900]	188	start_pe(:) = 0
	189
	190	CALL MPI_COMM_RANK( MPI_COMM_WORLD, m_world_rank, istat )
	191	CALL MPI_COMM_SIZE( MPI_COMM_WORLD, m_world_npes, istat )
[1764]	192	!
[2599]	193	!-- Only process 0 of root model reads
[1900]	194	IF ( m_world_rank == 0 ) THEN
[1762]	195
[4649]	196	CALL read_coupling_layout( nesting_datatransfer_mode, nesting_mode, &
[4883]	197	anterpolation_buffer_width, anterpolation_starting_height, particle_coupling, &
[4771]	198	pmc_status )
[1762]	199
[4649]	200	IF ( pmc_status /= pmc_no_namelist_found .AND. &
	201	pmc_status /= pmc_namelist_error ) &
[1900]	202	THEN
[1764]	203	!
[2801]	204	!-- Calculate start PE of every model
[1900]	205	start_pe(1) = 0
	206	DO i = 2, m_ncpl+1
	207	start_pe(i) = start_pe(i-1) + m_couplers(i-1)%npe_total
	208	ENDDO
[1762]	209
[1764]	210	!
[4649]	211	!-- The sum of numbers of processes requested by all the domains must be equal to the total
	212	!-- number of processes of the run
[1900]	213	IF ( start_pe(m_ncpl+1) /= m_world_npes ) THEN
[4649]	214	WRITE( message_string, '(2A,I6,2A,I6,A)' ) &
	215	'nesting-setup requires different number of ', &
	216	'MPI procs (', start_pe(m_ncpl+1), ') than ', &
	217	'provided (', m_world_npes,')'
[1900]	218	CALL message( 'pmc_init_model', 'PA0229', 3, 2, 0, 6, 0 )
	219	ENDIF
[1762]	220
[1900]	221	ENDIF
[1762]	222
[1900]	223	ENDIF
[1764]	224	!
[4649]	225	!-- Broadcast the read status. This synchronises all other processes with process 0 of the root
	226	!-- model. Without synchronisation, they would not behave in the correct way (e.g. they would not
	227	!-- return in case of a missing NAMELIST).
[1900]	228	CALL MPI_BCAST( pmc_status, 1, MPI_INTEGER, 0, MPI_COMM_WORLD, istat )
[1762]	229
[1900]	230	IF ( pmc_status == pmc_no_namelist_found ) THEN
[1764]	231	!
[1900]	232	!-- Not a nested run; return the MPI_WORLD communicator
	233	comm = MPI_COMM_WORLD
	234	RETURN
[1762]	235
[1900]	236	ELSEIF ( pmc_status == pmc_namelist_error ) THEN
[1764]	237	!
[4649]	238	!-- Only the root model gives the error message. Others are aborted by the message-routine with
	239	!-- MPI_ABORT. Must be done this way since myid and comm2d have not yet been assigned at this
	240	!-- point.
[1900]	241	IF ( m_world_rank == 0 ) THEN
[2932]	242	message_string = 'errors in \$nesting_parameters'
[1900]	243	CALL message( 'pmc_init_model', 'PA0223', 3, 2, 0, 6, 0 )
	244	ENDIF
[1762]	245
[1900]	246	ENDIF
[1762]	247
[2599]	248	CALL MPI_BCAST( m_ncpl, 1, MPI_INTEGER, 0, MPI_COMM_WORLD, istat )
	249	CALL MPI_BCAST( start_pe, m_ncpl+1, MPI_INTEGER, 0, MPI_COMM_WORLD, istat )
[1764]	250	!
[1900]	251	!-- Broadcast coupling layout
	252	DO i = 1, m_ncpl
[4649]	253	CALL MPI_BCAST( m_couplers(i)%name, LEN( m_couplers(i)%name ), &
[1900]	254	MPI_CHARACTER, 0, MPI_COMM_WORLD, istat )
[4649]	255	CALL MPI_BCAST( m_couplers(i)%id, 1, MPI_INTEGER, 0, &
[1900]	256	MPI_COMM_WORLD, istat )
[4649]	257	CALL MPI_BCAST( m_couplers(i)%Parent_id, 1, MPI_INTEGER, 0, &
[1900]	258	MPI_COMM_WORLD, istat )
[4649]	259	CALL MPI_BCAST( m_couplers(i)%npe_total, 1, MPI_INTEGER, 0, &
[1900]	260	MPI_COMM_WORLD, istat )
[4649]	261	CALL MPI_BCAST( m_couplers(i)%lower_left_x, 1, MPI_REAL, 0, &
[1900]	262	MPI_COMM_WORLD, istat )
[4649]	263	CALL MPI_BCAST( m_couplers(i)%lower_left_y, 1, MPI_REAL, 0, &
[1900]	264	MPI_COMM_WORLD, istat )
	265	ENDDO
[4649]	266	CALL MPI_BCAST( nesting_mode, LEN( nesting_mode ), MPI_CHARACTER, 0, MPI_COMM_WORLD, istat )
	267	CALL MPI_BCAST( nesting_datatransfer_mode, LEN(nesting_datatransfer_mode), MPI_CHARACTER, 0, &
[1900]	268	MPI_COMM_WORLD, istat )
[4649]	269	CALL MPI_BCAST( anterpolation_buffer_width, 1, MPI_INT, 0, MPI_COMM_WORLD, istat )
[4771]	270	CALL MPI_BCAST( anterpolation_starting_height, 1, MPI_REAL, 0, MPI_COMM_WORLD, istat )
[4883]	271	CALL MPI_BCAST( particle_coupling, 1, MPI_LOGICAL, 0, MPI_COMM_WORLD, istat )
[1764]	272	!
[1900]	273	!-- Assign global MPI processes to individual models by setting the couple id
	274	DO i = 1, m_ncpl
[4649]	275	IF ( m_world_rank >= start_pe(i) .AND. m_world_rank < start_pe(i+1) ) THEN
[1900]	276	m_my_cpl_id = i
	277	EXIT
	278	ENDIF
	279	ENDDO
	280	m_my_cpl_rank = m_world_rank - start_pe(i)
[1764]	281	!
[4649]	282	!-- MPI_COMM_WORLD is the communicator for ALL models (MPI-1 approach). The communictors for the
	283	!-- individual models as created by MPI_COMM_SPLIT. The color of the model is represented by the
	284	!-- coupler id
	285	CALL MPI_COMM_SPLIT( MPI_COMM_WORLD, m_my_cpl_id, m_my_cpl_rank, comm, istat )
[1764]	286	!
[2599]	287	!-- Get size and rank of the model running on this process
[1900]	288	CALL MPI_COMM_RANK( comm, m_model_rank, istat )
	289	CALL MPI_COMM_SIZE( comm, m_model_npes, istat )
[1764]	290	!
[2599]	291	!-- Broadcast (from process 0) the parent id and id of every model
[1900]	292	DO i = 1, m_ncpl
[4649]	293	CALL MPI_BCAST( m_couplers(i)%parent_id, 1, MPI_INTEGER, 0, MPI_COMM_WORLD, istat )
	294	CALL MPI_BCAST( m_couplers(i)%id, 1, MPI_INTEGER, 0, MPI_COMM_WORLD, istat )
[1900]	295	ENDDO
[1764]	296	!
[1900]	297	!-- Save the current model communicator for pmc internal use
	298	m_model_comm = comm
[1762]	299
[1764]	300	!
[2599]	301	!-- Create intercommunicator between the parent and children.
[4649]	302	!-- MPI_INTERCOMM_CREATE creates an intercommunicator between 2 groups of different colors. The
	303	!-- grouping was done above with MPI_COMM_SPLIT. A duplicate of MPI_COMM_WORLD is created and used
	304	!-- as peer communicator (peer_comm) for MPI_INTERCOMM_CREATE.
	305	CALL MPI_COMM_DUP( MPI_COMM_WORLD, peer_comm, ierr )
[1900]	306	DO i = 2, m_ncpl
	307	IF ( m_couplers(i)%parent_id == m_my_cpl_id ) THEN
[1764]	308	!
[4649]	309	!-- Identify all children models of the current model and create inter-communicators to
	310	!-- connect between the current model and its children models.
[1900]	311	tag = 500 + i
[4649]	312	CALL MPI_INTERCOMM_CREATE( comm, 0, peer_comm, start_pe(i), tag, m_to_child_comm(i), &
	313	istat )
[1933]	314	childcount = childcount + 1
	315	activeparent(i) = 1
[1900]	316	ELSEIF ( i == m_my_cpl_id) THEN
[1764]	317	!
[4649]	318	!-- Create an inter-communicator to connect between the current model and its parent model.
[1900]	319	tag = 500 + i
[4649]	320	CALL MPI_INTERCOMM_CREATE( comm, 0, peer_comm, start_pe(m_couplers(i)%parent_id), tag, &
	321	m_to_parent_comm, istat )
[1900]	322	ENDIF
	323	ENDDO
[1764]	324	!
[4649]	325	!-- If I am a parent, count the number of children I have. Although this loop is symmetric on all
	326	!-- processes, the "activeparent" flag is true (==1) on the respective individual process only.
[1933]	327	ALLOCATE( pmc_parent_for_child(childcount+1) )
[1762]	328
[1933]	329	childcount = 0
[1900]	330	DO i = 2, m_ncpl
[1933]	331	IF ( activeparent(i) == 1 ) THEN
	332	childcount = childcount + 1
	333	pmc_parent_for_child(childcount) = i
[1900]	334	ENDIF
	335	ENDDO
[1764]	336	!
[1933]	337	!-- Get the size of the parent model
[1900]	338	IF ( m_my_cpl_id > 1 ) THEN
[4649]	339	CALL MPI_COMM_REMOTE_SIZE( m_to_parent_comm, m_parent_remote_size, istat )
[1900]	340	ELSE
[1764]	341	!
[1933]	342	!-- The root model does not have a parent
	343	m_parent_remote_size = -1
[1900]	344	ENDIF
[1764]	345	!
[4649]	346	!-- Set myid to non-zero value except for the root domain. This is a setting for the message routine
	347	!-- which is called at the end of pmci_init. That routine outputs messages for myid = 0, only.
	348	!-- However, myid has not been assigened so far, so that all processes of the root model would
	349	!-- output a message. To avoid this, set myid to some other value except for process 0 of the root
	350	!-- domain.
[1900]	351	IF ( m_world_rank /= 0 ) myid = 1
[1762]	352
[1900]	353	END SUBROUTINE PMC_init_model
[1762]	354
	355
[4649]	356	!--------------------------------------------------------------------------------------------------!
	357	! Description:
	358	! ------------
	359	!> @Todo: Missing subroutine description.
	360	!--------------------------------------------------------------------------------------------------!
	361	SUBROUTINE pmc_get_model_info( comm_world_nesting, cpl_id, cpl_name, cpl_parent_id, lower_left_x, &
	362	lower_left_y, ncpl, npe_total, request_for_cpl_id )
[1764]	363	!
[1791]	364	!-- Provide module private variables of the pmc for PALM
[1762]	365
[1900]	366	USE kinds
[1762]	367
[1900]	368	IMPLICIT NONE
[1762]	369
[1933]	370	CHARACTER(LEN=*), INTENT(OUT), OPTIONAL :: cpl_name !<
[1762]	371
[1933]	372	INTEGER, INTENT(IN), OPTIONAL :: request_for_cpl_id !<
[1762]	373
[1900]	374	INTEGER, INTENT(OUT), OPTIONAL :: comm_world_nesting !<
	375	INTEGER, INTENT(OUT), OPTIONAL :: cpl_id !<
	376	INTEGER, INTENT(OUT), OPTIONAL :: cpl_parent_id !<
	377	INTEGER, INTENT(OUT), OPTIONAL :: ncpl !<
	378	INTEGER, INTENT(OUT), OPTIONAL :: npe_total !<
[1762]	379
[2599]	380	INTEGER :: requested_cpl_id !<
[1764]	381
[2599]	382	REAL(wp), INTENT(OUT), OPTIONAL :: lower_left_x !<
	383	REAL(wp), INTENT(OUT), OPTIONAL :: lower_left_y !<
[1764]	384
[1791]	385	!
[1900]	386	!-- Set the requested coupler id
	387	IF ( PRESENT( request_for_cpl_id ) ) THEN
	388	requested_cpl_id = request_for_cpl_id
[1791]	389	!
[1900]	390	!-- Check for allowed range of values
	391	IF ( requested_cpl_id < 1 .OR. requested_cpl_id > m_ncpl ) RETURN
	392	ELSE
	393	requested_cpl_id = m_my_cpl_id
	394	ENDIF
[1791]	395	!
[1900]	396	!-- Return the requested information
	397	IF ( PRESENT( comm_world_nesting ) ) THEN
	398	comm_world_nesting = m_world_comm
	399	ENDIF
	400	IF ( PRESENT( cpl_id ) ) THEN
	401	cpl_id = requested_cpl_id
	402	ENDIF
	403	IF ( PRESENT( cpl_parent_id ) ) THEN
	404	cpl_parent_id = m_couplers(requested_cpl_id)%parent_id
	405	ENDIF
	406	IF ( PRESENT( cpl_name ) ) THEN
	407	cpl_name = m_couplers(requested_cpl_id)%name
	408	ENDIF
	409	IF ( PRESENT( ncpl ) ) THEN
	410	ncpl = m_ncpl
	411	ENDIF
	412	IF ( PRESENT( npe_total ) ) THEN
	413	npe_total = m_couplers(requested_cpl_id)%npe_total
	414	ENDIF
	415	IF ( PRESENT( lower_left_x ) ) THEN
	416	lower_left_x = m_couplers(requested_cpl_id)%lower_left_x
	417	ENDIF
	418	IF ( PRESENT( lower_left_y ) ) THEN
	419	lower_left_y = m_couplers(requested_cpl_id)%lower_left_y
	420	ENDIF
[1791]	421
[1900]	422	END SUBROUTINE pmc_get_model_info
[1791]	423
	424
	425
[1900]	426	LOGICAL function pmc_is_rootmodel( )
[1764]	427
[1900]	428	IMPLICIT NONE
[1764]	429
[1900]	430	pmc_is_rootmodel = ( m_my_cpl_id == 1 )
[1764]	431
[1900]	432	END FUNCTION pmc_is_rootmodel
[1764]	433
	434
	435
[4649]	436	!--------------------------------------------------------------------------------------------------!
	437	! Description:
	438	! ------------
	439	!> @Todo: Missing subroutine description.
	440	!--------------------------------------------------------------------------------------------------!
	441	SUBROUTINE read_coupling_layout( nesting_datatransfer_mode, nesting_mode, &
[4771]	442	anterpolation_buffer_width, anterpolation_starting_height, &
[4883]	443	particle_coupling, pmc_status )
[1762]	444
[1764]	445	IMPLICIT NONE
[1762]	446
[4649]	447	CHARACTER(LEN=7), INTENT(INOUT) :: nesting_datatransfer_mode !<
	448	CHARACTER(LEN=8), INTENT(INOUT) :: nesting_mode !<
[1764]	449
[4649]	450	INTEGER, INTENT(INOUT) :: anterpolation_buffer_width !< Boundary buffer width for anterpolation
	451	INTEGER(iwp), INTENT(INOUT) :: pmc_status !<
[1764]	452
[4771]	453	REAL(wp), INTENT(INOUT) :: anterpolation_starting_height !< steering parameter for canopy restricted anterpolation
[4883]	454	LOGICAL, INTENT(INOUT) :: particle_coupling !< switch for particle coupling (default .TRUE.)
[4771]	455
[4649]	456	INTEGER(iwp) :: bad_llcorner !<
	457	INTEGER(iwp) :: i !<
[4843]	458	INTEGER(iwp) :: io_status !<
[4649]	459
[4843]	460	LOGICAL :: switch_off_module = .FALSE. !< local namelist parameter to switch off the module
	461	!< although the respective module namelist appears in
	462	!< the namelist file
	463
[4649]	464	TYPE(pmc_layout), DIMENSION(pmc_max_models) :: domain_layouts !<
	465
[4843]	466	NAMELIST /nesting_parameters/ anterpolation_buffer_width, &
	467	anterpolation_starting_height, &
	468	domain_layouts, &
[4649]	469	nesting_datatransfer_mode, &
	470	nesting_mode, &
[4883]	471	switch_off_module, &
	472	particle_coupling
[4649]	473
[4843]	474
[1764]	475	!
	476	!-- Initialize some coupling variables
[1900]	477	domain_layouts(1:pmc_max_models)%id = -1
[1791]	478	m_ncpl = 0
[1762]	479
[4843]	480	pmc_status = pmc_no_namelist_found
[1764]	481	!
	482	!-- Open the NAMELIST-file and read the nesting layout
	483	CALL check_open( 11 )
[4843]	484	READ ( 11, nesting_parameters, IOSTAT = io_status )
[2279]	485	!
[4649]	486	!-- Set filepointer to the beginning of the file. Otherwise process 0 will later be unable to read
	487	!-- the inipar-NAMELIST
[2279]	488	REWIND ( 11 )
[1764]	489
[4843]	490	IF ( io_status == 0 ) THEN
[1764]	491	!
[4843]	492	!-- nesting_parameters namelist was found and read correctly. Enable the nesting by setting
	493	!-- the palm model coupler status respectively.
	494	IF ( .NOT. switch_off_module ) THEN
	495	pmc_status = pmc_status_ok
	496	ELSE
	497	RETURN
	498	ENDIF
	499	ELSEIF ( io_status < 0 ) THEN
	500	!
[2932]	501	!-- No nesting_parameters-NAMELIST found
[1762]	502	RETURN
[4843]	503	ELSEIF ( io_status > 0 ) THEN
[1764]	504	!
[2932]	505	!-- Errors in reading nesting_parameters-NAMELIST
[1764]	506	pmc_status = pmc_namelist_error
	507	RETURN
	508	ENDIF
[4843]	509
[1764]	510	!
	511	!-- Output location message
[3885]	512	CALL location_message( 'initialize communicators for nesting', 'start' )
[1764]	513	!
[2599]	514	!-- Assign the layout to the corresponding internally used variable m_couplers
[1764]	515	m_couplers = domain_layouts
	516	!
[2932]	517	!-- Get the number of nested models given in the nesting_parameters-NAMELIST
[1900]	518	DO i = 1, pmc_max_models
[1764]	519	!
[1791]	520	!-- When id=-1 is found for the first time, the list of domains is finished
[2599]	521	IF ( m_couplers(i)%id == -1 .OR. i == pmc_max_models ) THEN
[1791]	522	IF ( m_couplers(i)%id == -1 ) THEN
	523	m_ncpl = i - 1
	524	EXIT
	525	ELSE
[1900]	526	m_ncpl = pmc_max_models
[1791]	527	ENDIF
[1764]	528	ENDIF
	529	ENDDO
[1933]	530	!
[4649]	531	!-- Make sure that all domains have equal lower left corner in case of vertical nesting
[1933]	532	IF ( nesting_mode == 'vertical' ) THEN
	533	bad_llcorner = 0
	534	DO i = 1, m_ncpl
[4649]	535	IF ( domain_layouts(i)%lower_left_x /= 0.0_wp .OR. &
[1933]	536	domain_layouts(i)%lower_left_y /= 0.0_wp ) THEN
	537	bad_llcorner = bad_llcorner + 1
	538	domain_layouts(i)%lower_left_x = 0.0_wp
	539	domain_layouts(i)%lower_left_y = 0.0_wp
	540	ENDIF
	541	ENDDO
	542	IF ( bad_llcorner /= 0) THEN
[4649]	543	WRITE( message_string, *) 'at least one dimension of lower ', &
	544	'left corner of one domain is not 0. ', &
	545	'All lower left corners were set to (0, 0)'
[1933]	546	CALL message( 'read_coupling_layout', 'PA0427', 0, 0, 0, 6, 0 )
	547	ENDIF
	548	ENDIF
	549
[3885]	550	CALL location_message( 'initialize communicators for nesting', 'finished' )
	551
[1764]	552	END SUBROUTINE read_coupling_layout
	553
	554	#endif
	555	END MODULE pmc_handle_communicator

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source: palm/trunk/SOURCE/pmc_handle_communicator_mod.f90 @ 4896

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