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source: palm/trunk/SOURCE/exchange_horiz.f90 @ 1755

Last change on this file since 1755 was 1683, checked in by knoop, 9 years ago
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[1682]	1	!> @file exchange_horiz.f90
[1320]	2	!------------------------------------------------------------------------------!
[1036]	3	! This file is part of PALM.
	4	!
	5	! PALM is free software: you can redistribute it and/or modify it under the terms
	6	! of the GNU General Public License as published by the Free Software Foundation,
	7	! either version 3 of the License, or (at your option) any later version.
	8	!
	9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	12	!
	13	! You should have received a copy of the GNU General Public License along with
	14	! PALM. If not, see <http://www.gnu.org/licenses/>.
	15	!
[1310]	16	! Copyright 1997-2014 Leibniz Universitaet Hannover
[1320]	17	!------------------------------------------------------------------------------!
[1036]	18	!
[484]	19	! Current revisions:
[1]	20	! -----------------
[1678]	21	!
[1683]	22	!
[1321]	23	! Former revisions:
	24	! -----------------
	25	! $Id: exchange_horiz.f90 1683 2015-10-07 23:57:51Z maronga $
	26	!
[1683]	27	! 1682 2015-10-07 23:56:08Z knoop
	28	! Code annotations made doxygen readable
	29	!
[1678]	30	! 1677 2015-10-02 13:25:23Z boeske
	31	! Added new routine for exchange of three-dimensional integer arrays
	32	!
[1570]	33	! 1569 2015-03-12 07:54:38Z raasch
	34	! bugfix in background communication part
	35	!
[1349]	36	! 1348 2014-03-27 18:01:03Z raasch
[1569]	37	! bugfix: on_device added to ONLY-list
[1349]	38	!
[1345]	39	! 1344 2014-03-26 17:33:09Z kanani
	40	! Added missing parameters to ONLY-attribute
	41	!
[1321]	42	! 1320 2014-03-20 08:40:49Z raasch
[1320]	43	! ONLY-attribute added to USE-statements,
	44	! kind-parameters added to all INTEGER and REAL declaration statements,
	45	! kinds are defined in new module kinds,
	46	! revision history before 2012 removed,
	47	! comment fields (!:) to be used for variable explanations added to
	48	! all variable declaration statements
[668]	49	!
[1258]	50	! 1257 2013-11-08 15:18:40Z raasch
	51	! openacc loop and loop vector clauses removed
	52	!
[1132]	53	! 1128 2013-04-12 06:19:32Z raasch
	54	! modifications for asynchronous transfer,
	55	! local variables req, wait_stat are global now, and have been moved to module
	56	! pegrid
	57	!
[1114]	58	! 1113 2013-03-10 02:48:14Z raasch
	59	! GPU-porting for single-core (1PE) mode
	60	!
[1037]	61	! 1036 2012-10-22 13:43:42Z raasch
	62	! code put under GPL (PALM 3.9)
	63	!
[842]	64	! 841 2012-02-28 12:29:49Z maronga
	65	! Excluded routine from compilation of namelist_file_check
	66	!
[1]	67	! Revision 1.1 1997/07/24 11:13:29 raasch
	68	! Initial revision
	69	!
	70	!
	71	! Description:
	72	! ------------
[1682]	73	!> Exchange of lateral boundary values (parallel computers) and cyclic
	74	!> lateral boundary conditions, respectively.
[1]	75	!------------------------------------------------------------------------------!
[1682]	76	SUBROUTINE exchange_horiz( ar, nbgp_local)
	77
[1]	78
[1320]	79	USE control_parameters, &
[1344]	80	ONLY: bc_lr, bc_lr_cyc, bc_ns, bc_ns_cyc, grid_level, &
[1348]	81	mg_switch_to_pe0, on_device, synchronous_exchange
[1320]	82
	83	USE cpulog, &
	84	ONLY: cpu_log, log_point_s
	85
	86	USE indices, &
	87	ONLY: nxl, nxr, nyn, nys, nzb, nzt
	88
	89	USE kinds
	90
[1]	91	USE pegrid
	92
	93	IMPLICIT NONE
	94
[841]	95
[1682]	96	INTEGER(iwp) :: i !<
	97	INTEGER(iwp) :: j !<
	98	INTEGER(iwp) :: k !<
	99	INTEGER(iwp) :: nbgp_local !<
[1320]	100
	101	REAL(wp), DIMENSION(nzb:nzt+1,nys-nbgp_local:nyn+nbgp_local, &
[1682]	102	nxl-nbgp_local:nxr+nbgp_local) :: ar !<
[1320]	103
[841]	104
	105	#if ! defined( __check )
[1]	106
	107	CALL cpu_log( log_point_s(2), 'exchange_horiz', 'start' )
	108
	109	#if defined( __parallel )
	110
	111	!
[1128]	112	!-- Exchange in x-direction of lateral boundaries
[1]	113	IF ( pdims(1) == 1 .OR. mg_switch_to_pe0 ) THEN
	114	!
	115	!-- One-dimensional decomposition along y, boundary values can be exchanged
	116	!-- within the PE memory
[707]	117	IF ( bc_lr_cyc ) THEN
[667]	118	ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr)
	119	ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1)
[1]	120	ENDIF
	121
	122	ELSE
[75]	123
[683]	124	IF ( synchronous_exchange ) THEN
[1]	125	!
[683]	126	!-- Send left boundary, receive right one (synchronous)
	127	CALL MPI_SENDRECV( &
[707]	128	ar(nzb,nys-nbgp_local,nxl), 1, type_yz(grid_level), pleft, 0, &
	129	ar(nzb,nys-nbgp_local,nxr+1), 1, type_yz(grid_level), pright, 0, &
	130	comm2d, status, ierr )
[1]	131	!
[683]	132	!-- Send right boundary, receive left one (synchronous)
[1320]	133	CALL MPI_SENDRECV( ar(nzb,nys-nbgp_local,nxr+1-nbgp_local), 1, &
	134	type_yz(grid_level), pright, 1, &
	135	ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, &
	136	type_yz(grid_level), pleft, 1, &
[707]	137	comm2d, status, ierr )
[667]	138
[683]	139	ELSE
[667]	140
[683]	141	!
[1128]	142	!-- In case of background communication switched on, exchange is done
	143	!-- either along x or along y
	144	IF ( send_receive == 'lr' .OR. send_receive == 'al' ) THEN
	145
	146	IF ( .NOT. sendrecv_in_background ) THEN
	147	req(1:4) = 0
	148	req_count = 0
	149	ENDIF
[683]	150	!
[1128]	151	!-- Send left boundary, receive right one (asynchronous)
	152	CALL MPI_ISEND( ar(nzb,nys-nbgp_local,nxl), 1, type_yz(grid_level), &
	153	pleft, req_count, comm2d, req(req_count+1), ierr )
	154	CALL MPI_IRECV( ar(nzb,nys-nbgp_local,nxr+1), 1, type_yz(grid_level), &
	155	pright, req_count, comm2d, req(req_count+2), ierr )
	156	!
	157	!-- Send right boundary, receive left one (asynchronous)
[1320]	158	CALL MPI_ISEND( ar(nzb,nys-nbgp_local,nxr+1-nbgp_local), 1, &
	159	type_yz(grid_level), pright, req_count+1, comm2d, &
[1128]	160	req(req_count+3), ierr )
[1320]	161	CALL MPI_IRECV( ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, &
	162	type_yz(grid_level), pleft, req_count+1, comm2d, &
[1128]	163	req(req_count+4), ierr )
[667]	164
[1128]	165	IF ( .NOT. sendrecv_in_background ) THEN
	166	CALL MPI_WAITALL( 4, req, wait_stat, ierr )
	167	ELSE
	168	req_count = req_count + 4
	169	ENDIF
[75]	170
[1128]	171	ENDIF
	172
[683]	173	ENDIF
	174
[1]	175	ENDIF
	176
	177
	178	IF ( pdims(2) == 1 .OR. mg_switch_to_pe0 ) THEN
	179	!
	180	!-- One-dimensional decomposition along x, boundary values can be exchanged
	181	!-- within the PE memory
[707]	182	IF ( bc_ns_cyc ) THEN
[667]	183	ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:)
	184	ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:)
[1]	185	ENDIF
	186
	187	ELSE
	188
[683]	189	IF ( synchronous_exchange ) THEN
[1]	190	!
[683]	191	!-- Send front boundary, receive rear one (synchronous)
	192	CALL MPI_SENDRECV( &
[707]	193	ar(nzb,nys,nxl-nbgp_local), 1, type_xz(grid_level), psouth, 0, &
	194	ar(nzb,nyn+1,nxl-nbgp_local), 1, type_xz(grid_level), pnorth, 0, &
	195	comm2d, status, ierr )
[683]	196	!
	197	!-- Send rear boundary, receive front one (synchronous)
[1320]	198	CALL MPI_SENDRECV( ar(nzb,nyn-nbgp_local+1,nxl-nbgp_local), 1, &
	199	type_xz(grid_level), pnorth, 1, &
	200	ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, &
	201	type_xz(grid_level), psouth, 1, &
[707]	202	comm2d, status, ierr )
[667]	203
[683]	204	ELSE
	205
[1]	206	!
[1128]	207	!-- In case of background communication switched on, exchange is done
	208	!-- either along x or along y
[1569]	209	IF ( send_receive == 'ns' .OR. send_receive == 'al' ) THEN
[1128]	210
	211	IF ( .NOT. sendrecv_in_background ) THEN
	212	req(1:4) = 0
	213	req_count = 0
	214	ENDIF
	215
[683]	216	!
[1128]	217	!-- Send front boundary, receive rear one (asynchronous)
	218	CALL MPI_ISEND( ar(nzb,nys,nxl-nbgp_local), 1, type_xz(grid_level), &
	219	psouth, req_count, comm2d, req(req_count+1), ierr )
	220	CALL MPI_IRECV( ar(nzb,nyn+1,nxl-nbgp_local), 1, type_xz(grid_level), &
	221	pnorth, req_count, comm2d, req(req_count+2), ierr )
	222	!
	223	!-- Send rear boundary, receive front one (asynchronous)
[1320]	224	CALL MPI_ISEND( ar(nzb,nyn-nbgp_local+1,nxl-nbgp_local), 1, &
	225	type_xz(grid_level), pnorth, req_count+1, comm2d, &
[1128]	226	req(req_count+3), ierr )
[1320]	227	CALL MPI_IRECV( ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, &
	228	type_xz(grid_level), psouth, req_count+1, comm2d, &
[1128]	229	req(req_count+4), ierr )
[75]	230
[1128]	231	IF ( .NOT. sendrecv_in_background ) THEN
	232	CALL MPI_WAITALL( 4, req, wait_stat, ierr )
	233	ELSE
	234	req_count = req_count + 4
	235	ENDIF
[683]	236
[1128]	237	ENDIF
	238
[683]	239	ENDIF
	240
[1]	241	ENDIF
	242
	243	#else
	244
	245	!
[1113]	246	!-- Lateral boundary conditions in the non-parallel case.
	247	!-- Case dependent, because in GPU mode still not all arrays are on device. This
	248	!-- workaround has to be removed later. Also, since PGI compiler 12.5 has problems
	249	!-- with array syntax, explicit loops are used.
[1]	250	IF ( bc_lr == 'cyclic' ) THEN
[1113]	251	IF ( on_device ) THEN
	252	!$acc kernels present( ar )
	253	!$acc loop independent
	254	DO i = 0, nbgp_local-1
	255	DO j = nys-nbgp_local, nyn+nbgp_local
	256	DO k = nzb, nzt+1
	257	ar(k,j,nxl-nbgp_local+i) = ar(k,j,nxr-nbgp_local+1+i)
	258	ar(k,j,nxr+1+i) = ar(k,j,nxl+i)
	259	ENDDO
	260	ENDDO
	261	ENDDO
	262	!$acc end kernels
	263	ELSE
	264	ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr)
	265	ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1)
	266	ENDIF
[1]	267	ENDIF
	268
	269	IF ( bc_ns == 'cyclic' ) THEN
[1113]	270	IF ( on_device ) THEN
	271	!$acc kernels present( ar )
	272	DO i = nxl-nbgp_local, nxr+nbgp_local
	273	!$acc loop independent
	274	DO j = 0, nbgp_local-1
[1257]	275	!$acc loop independent
[1113]	276	DO k = nzb, nzt+1
	277	ar(k,nys-nbgp_local+j,i) = ar(k,nyn-nbgp_local+1+j,i)
	278	ar(k,nyn+1+j,i) = ar(k,nys+j,i)
	279	ENDDO
	280	ENDDO
	281	ENDDO
	282	!$acc end kernels
	283	ELSE
	284	ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:)
	285	ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:)
	286	ENDIF
[1]	287	ENDIF
	288
	289	#endif
	290	CALL cpu_log( log_point_s(2), 'exchange_horiz', 'stop' )
	291
[841]	292	#endif
[1]	293	END SUBROUTINE exchange_horiz
[1677]	294
	295
[1682]	296	!------------------------------------------------------------------------------!
	297	! Description:
	298	! ------------
	299	!> @todo Missing subroutine description.
	300	!------------------------------------------------------------------------------!
[1677]	301	SUBROUTINE exchange_horiz_int( ar, nbgp_local)
	302
	303	USE control_parameters, &
	304	ONLY: bc_lr, bc_lr_cyc, bc_ns, bc_ns_cyc
	305
	306	USE indices, &
	307	ONLY: nxl, nxr, nyn, nys, nzb, nzt
	308
	309	USE kinds
	310
	311	USE pegrid
	312
	313	IMPLICIT NONE
	314
	315
[1682]	316	INTEGER(iwp) :: nbgp_local !< number of ghost points
[1677]	317
	318	INTEGER(iwp), DIMENSION(nzb:nzt+1,nys-nbgp_local:nyn+nbgp_local, &
[1682]	319	nxl-nbgp_local:nxr+nbgp_local) :: ar !< treated array
[1677]	320
	321	#if ! defined( __check )
	322
	323	#if defined( __parallel )
	324	IF ( pdims(1) == 1 ) THEN
	325	!
	326	!-- One-dimensional decomposition along y, boundary values can be exchanged
	327	!-- within the PE memory
	328	IF ( bc_lr_cyc ) THEN
	329	ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr)
	330	ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1)
	331	ENDIF
	332	ELSE
	333	!
	334	!-- Send left boundary, receive right one (synchronous)
	335	CALL MPI_SENDRECV( &
	336	ar(nzb,nys-nbgp_local,nxl), 1, type_yz_int, pleft, 0, &
	337	ar(nzb,nys-nbgp_local,nxr+1), 1, type_yz_int, pright, 0, &
	338	comm2d, status, ierr )
	339	!
	340	!-- Send right boundary, receive left one (synchronous)
	341	CALL MPI_SENDRECV( &
	342	ar(nzb,nys-nbgp_local,nxr+1-nbgp_local), 1, type_yz_int, pright, 1, &
	343	ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, type_yz_int, pleft, 1, &
	344	comm2d, status, ierr )
	345	ENDIF
	346
	347
	348	IF ( pdims(2) == 1 ) THEN
	349	!
	350	!-- One-dimensional decomposition along x, boundary values can be exchanged
	351	!-- within the PE memory
	352	IF ( bc_ns_cyc ) THEN
	353	ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:)
	354	ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:)
	355	ENDIF
	356
	357	ELSE
	358
	359	!
	360	!-- Send front boundary, receive rear one (synchronous)
	361	CALL MPI_SENDRECV( &
	362	ar(nzb,nys,nxl-nbgp_local), 1, type_xz_int, psouth, 0, &
	363	ar(nzb,nyn+1,nxl-nbgp_local), 1, type_xz_int, pnorth, 0, &
	364	comm2d, status, ierr )
	365	!
	366	!-- Send rear boundary, receive front one (synchronous)
	367	CALL MPI_SENDRECV( ar(nzb,nyn-nbgp_local+1,nxl-nbgp_local), 1, &
	368	type_xz_int, pnorth, 1, &
	369	ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, &
	370	type_xz_int, psouth, 1, &
	371	comm2d, status, ierr )
	372
	373	ENDIF
	374
	375	#else
	376
	377	IF ( bc_lr == 'cyclic' ) THEN
	378	ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr)
	379	ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1)
	380	ENDIF
	381
	382	IF ( bc_ns == 'cyclic' ) THEN
	383	ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:)
	384	ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:)
	385	ENDIF
	386
	387	#endif
	388	#endif
	389
	390
	391	END SUBROUTINE exchange_horiz_int

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