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source: palm/trunk/SOURCE/exchange_horiz.f90 @ 2104

Last change on this file since 2104 was 2101, checked in by suehring, 8 years ago
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[1682]	1	!> @file exchange_horiz.f90
[1320]	2	!------------------------------------------------------------------------------!
[1036]	3	! This file is part of PALM.
	4	!
[2000]	5	! PALM is free software: you can redistribute it and/or modify it under the
	6	! terms of the GNU General Public License as published by the Free Software
	7	! Foundation, either version 3 of the License, or (at your option) any later
	8	! version.
[1036]	9	!
	10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	13	!
	14	! You should have received a copy of the GNU General Public License along with
	15	! PALM. If not, see <http://www.gnu.org/licenses/>.
	16	!
[2101]	17	! Copyright 1997-2017 Leibniz Universitaet Hannover
[1320]	18	!------------------------------------------------------------------------------!
[1036]	19	!
[484]	20	! Current revisions:
[1]	21	! -----------------
[1678]	22	!
[2001]	23	!
[1321]	24	! Former revisions:
	25	! -----------------
	26	! $Id: exchange_horiz.f90 2101 2017-01-05 16:42:31Z knoop $
	27	!
[2001]	28	! 2000 2016-08-20 18:09:15Z knoop
	29	! Forced header and separation lines into 80 columns
	30	!
[1805]	31	! 1804 2016-04-05 16:30:18Z maronga
	32	! Removed code for parameter file check (__check)
	33	!
[1683]	34	! 1682 2015-10-07 23:56:08Z knoop
	35	! Code annotations made doxygen readable
	36	!
[1678]	37	! 1677 2015-10-02 13:25:23Z boeske
	38	! Added new routine for exchange of three-dimensional integer arrays
	39	!
[1570]	40	! 1569 2015-03-12 07:54:38Z raasch
	41	! bugfix in background communication part
	42	!
[1349]	43	! 1348 2014-03-27 18:01:03Z raasch
[1569]	44	! bugfix: on_device added to ONLY-list
[1349]	45	!
[1345]	46	! 1344 2014-03-26 17:33:09Z kanani
	47	! Added missing parameters to ONLY-attribute
	48	!
[1321]	49	! 1320 2014-03-20 08:40:49Z raasch
[1320]	50	! ONLY-attribute added to USE-statements,
	51	! kind-parameters added to all INTEGER and REAL declaration statements,
	52	! kinds are defined in new module kinds,
	53	! revision history before 2012 removed,
	54	! comment fields (!:) to be used for variable explanations added to
	55	! all variable declaration statements
[668]	56	!
[1258]	57	! 1257 2013-11-08 15:18:40Z raasch
	58	! openacc loop and loop vector clauses removed
	59	!
[1132]	60	! 1128 2013-04-12 06:19:32Z raasch
	61	! modifications for asynchronous transfer,
	62	! local variables req, wait_stat are global now, and have been moved to module
	63	! pegrid
	64	!
[1114]	65	! 1113 2013-03-10 02:48:14Z raasch
	66	! GPU-porting for single-core (1PE) mode
	67	!
[1037]	68	! 1036 2012-10-22 13:43:42Z raasch
	69	! code put under GPL (PALM 3.9)
	70	!
[842]	71	! 841 2012-02-28 12:29:49Z maronga
	72	! Excluded routine from compilation of namelist_file_check
	73	!
[1]	74	! Revision 1.1 1997/07/24 11:13:29 raasch
	75	! Initial revision
	76	!
	77	!
	78	! Description:
	79	! ------------
[1682]	80	!> Exchange of lateral boundary values (parallel computers) and cyclic
	81	!> lateral boundary conditions, respectively.
[1]	82	!------------------------------------------------------------------------------!
[1682]	83	SUBROUTINE exchange_horiz( ar, nbgp_local)
	84
[1]	85
[1320]	86	USE control_parameters, &
[1344]	87	ONLY: bc_lr, bc_lr_cyc, bc_ns, bc_ns_cyc, grid_level, &
[1348]	88	mg_switch_to_pe0, on_device, synchronous_exchange
[1320]	89
	90	USE cpulog, &
	91	ONLY: cpu_log, log_point_s
	92
	93	USE indices, &
	94	ONLY: nxl, nxr, nyn, nys, nzb, nzt
	95
	96	USE kinds
	97
[1]	98	USE pegrid
	99
	100	IMPLICIT NONE
	101
[841]	102
[1682]	103	INTEGER(iwp) :: i !<
	104	INTEGER(iwp) :: j !<
	105	INTEGER(iwp) :: k !<
	106	INTEGER(iwp) :: nbgp_local !<
[1320]	107
	108	REAL(wp), DIMENSION(nzb:nzt+1,nys-nbgp_local:nyn+nbgp_local, &
[1682]	109	nxl-nbgp_local:nxr+nbgp_local) :: ar !<
[1320]	110
[841]	111
[1]	112	CALL cpu_log( log_point_s(2), 'exchange_horiz', 'start' )
	113
	114	#if defined( __parallel )
	115
	116	!
[1128]	117	!-- Exchange in x-direction of lateral boundaries
[1]	118	IF ( pdims(1) == 1 .OR. mg_switch_to_pe0 ) THEN
	119	!
	120	!-- One-dimensional decomposition along y, boundary values can be exchanged
	121	!-- within the PE memory
[707]	122	IF ( bc_lr_cyc ) THEN
[667]	123	ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr)
	124	ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1)
[1]	125	ENDIF
	126
	127	ELSE
[75]	128
[683]	129	IF ( synchronous_exchange ) THEN
[1]	130	!
[683]	131	!-- Send left boundary, receive right one (synchronous)
	132	CALL MPI_SENDRECV( &
[707]	133	ar(nzb,nys-nbgp_local,nxl), 1, type_yz(grid_level), pleft, 0, &
	134	ar(nzb,nys-nbgp_local,nxr+1), 1, type_yz(grid_level), pright, 0, &
	135	comm2d, status, ierr )
[1]	136	!
[683]	137	!-- Send right boundary, receive left one (synchronous)
[1320]	138	CALL MPI_SENDRECV( ar(nzb,nys-nbgp_local,nxr+1-nbgp_local), 1, &
	139	type_yz(grid_level), pright, 1, &
	140	ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, &
	141	type_yz(grid_level), pleft, 1, &
[707]	142	comm2d, status, ierr )
[667]	143
[683]	144	ELSE
[667]	145
[683]	146	!
[1128]	147	!-- In case of background communication switched on, exchange is done
	148	!-- either along x or along y
	149	IF ( send_receive == 'lr' .OR. send_receive == 'al' ) THEN
	150
	151	IF ( .NOT. sendrecv_in_background ) THEN
	152	req(1:4) = 0
	153	req_count = 0
	154	ENDIF
[683]	155	!
[1128]	156	!-- Send left boundary, receive right one (asynchronous)
	157	CALL MPI_ISEND( ar(nzb,nys-nbgp_local,nxl), 1, type_yz(grid_level), &
	158	pleft, req_count, comm2d, req(req_count+1), ierr )
	159	CALL MPI_IRECV( ar(nzb,nys-nbgp_local,nxr+1), 1, type_yz(grid_level), &
	160	pright, req_count, comm2d, req(req_count+2), ierr )
	161	!
	162	!-- Send right boundary, receive left one (asynchronous)
[1320]	163	CALL MPI_ISEND( ar(nzb,nys-nbgp_local,nxr+1-nbgp_local), 1, &
	164	type_yz(grid_level), pright, req_count+1, comm2d, &
[1128]	165	req(req_count+3), ierr )
[1320]	166	CALL MPI_IRECV( ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, &
	167	type_yz(grid_level), pleft, req_count+1, comm2d, &
[1128]	168	req(req_count+4), ierr )
[667]	169
[1128]	170	IF ( .NOT. sendrecv_in_background ) THEN
	171	CALL MPI_WAITALL( 4, req, wait_stat, ierr )
	172	ELSE
	173	req_count = req_count + 4
	174	ENDIF
[75]	175
[1128]	176	ENDIF
	177
[683]	178	ENDIF
	179
[1]	180	ENDIF
	181
	182
	183	IF ( pdims(2) == 1 .OR. mg_switch_to_pe0 ) THEN
	184	!
	185	!-- One-dimensional decomposition along x, boundary values can be exchanged
	186	!-- within the PE memory
[707]	187	IF ( bc_ns_cyc ) THEN
[667]	188	ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:)
	189	ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:)
[1]	190	ENDIF
	191
	192	ELSE
	193
[683]	194	IF ( synchronous_exchange ) THEN
[1]	195	!
[683]	196	!-- Send front boundary, receive rear one (synchronous)
	197	CALL MPI_SENDRECV( &
[707]	198	ar(nzb,nys,nxl-nbgp_local), 1, type_xz(grid_level), psouth, 0, &
	199	ar(nzb,nyn+1,nxl-nbgp_local), 1, type_xz(grid_level), pnorth, 0, &
	200	comm2d, status, ierr )
[683]	201	!
	202	!-- Send rear boundary, receive front one (synchronous)
[1320]	203	CALL MPI_SENDRECV( ar(nzb,nyn-nbgp_local+1,nxl-nbgp_local), 1, &
	204	type_xz(grid_level), pnorth, 1, &
	205	ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, &
	206	type_xz(grid_level), psouth, 1, &
[707]	207	comm2d, status, ierr )
[667]	208
[683]	209	ELSE
	210
[1]	211	!
[1128]	212	!-- In case of background communication switched on, exchange is done
	213	!-- either along x or along y
[1569]	214	IF ( send_receive == 'ns' .OR. send_receive == 'al' ) THEN
[1128]	215
	216	IF ( .NOT. sendrecv_in_background ) THEN
	217	req(1:4) = 0
	218	req_count = 0
	219	ENDIF
	220
[683]	221	!
[1128]	222	!-- Send front boundary, receive rear one (asynchronous)
	223	CALL MPI_ISEND( ar(nzb,nys,nxl-nbgp_local), 1, type_xz(grid_level), &
	224	psouth, req_count, comm2d, req(req_count+1), ierr )
	225	CALL MPI_IRECV( ar(nzb,nyn+1,nxl-nbgp_local), 1, type_xz(grid_level), &
	226	pnorth, req_count, comm2d, req(req_count+2), ierr )
	227	!
	228	!-- Send rear boundary, receive front one (asynchronous)
[1320]	229	CALL MPI_ISEND( ar(nzb,nyn-nbgp_local+1,nxl-nbgp_local), 1, &
	230	type_xz(grid_level), pnorth, req_count+1, comm2d, &
[1128]	231	req(req_count+3), ierr )
[1320]	232	CALL MPI_IRECV( ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, &
	233	type_xz(grid_level), psouth, req_count+1, comm2d, &
[1128]	234	req(req_count+4), ierr )
[75]	235
[1128]	236	IF ( .NOT. sendrecv_in_background ) THEN
	237	CALL MPI_WAITALL( 4, req, wait_stat, ierr )
	238	ELSE
	239	req_count = req_count + 4
	240	ENDIF
[683]	241
[1128]	242	ENDIF
	243
[683]	244	ENDIF
	245
[1]	246	ENDIF
	247
	248	#else
	249
	250	!
[1113]	251	!-- Lateral boundary conditions in the non-parallel case.
	252	!-- Case dependent, because in GPU mode still not all arrays are on device. This
	253	!-- workaround has to be removed later. Also, since PGI compiler 12.5 has problems
	254	!-- with array syntax, explicit loops are used.
[1]	255	IF ( bc_lr == 'cyclic' ) THEN
[1113]	256	IF ( on_device ) THEN
	257	!$acc kernels present( ar )
	258	!$acc loop independent
	259	DO i = 0, nbgp_local-1
	260	DO j = nys-nbgp_local, nyn+nbgp_local
	261	DO k = nzb, nzt+1
	262	ar(k,j,nxl-nbgp_local+i) = ar(k,j,nxr-nbgp_local+1+i)
	263	ar(k,j,nxr+1+i) = ar(k,j,nxl+i)
	264	ENDDO
	265	ENDDO
	266	ENDDO
	267	!$acc end kernels
	268	ELSE
	269	ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr)
	270	ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1)
	271	ENDIF
[1]	272	ENDIF
	273
	274	IF ( bc_ns == 'cyclic' ) THEN
[1113]	275	IF ( on_device ) THEN
	276	!$acc kernels present( ar )
	277	DO i = nxl-nbgp_local, nxr+nbgp_local
	278	!$acc loop independent
	279	DO j = 0, nbgp_local-1
[1257]	280	!$acc loop independent
[1113]	281	DO k = nzb, nzt+1
	282	ar(k,nys-nbgp_local+j,i) = ar(k,nyn-nbgp_local+1+j,i)
[1933]	283	ar(k,nyn+1+j,i) = ar(k,nys+j,i)
[1113]	284	ENDDO
	285	ENDDO
	286	ENDDO
	287	!$acc end kernels
	288	ELSE
	289	ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:)
	290	ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:)
	291	ENDIF
[1]	292	ENDIF
	293
	294	#endif
	295	CALL cpu_log( log_point_s(2), 'exchange_horiz', 'stop' )
	296
	297	END SUBROUTINE exchange_horiz
[1677]	298
	299
[1682]	300	!------------------------------------------------------------------------------!
	301	! Description:
	302	! ------------
	303	!> @todo Missing subroutine description.
	304	!------------------------------------------------------------------------------!
[1677]	305	SUBROUTINE exchange_horiz_int( ar, nbgp_local)
	306
	307	USE control_parameters, &
	308	ONLY: bc_lr, bc_lr_cyc, bc_ns, bc_ns_cyc
	309
	310	USE indices, &
	311	ONLY: nxl, nxr, nyn, nys, nzb, nzt
	312
	313	USE kinds
	314
	315	USE pegrid
	316
	317	IMPLICIT NONE
	318
	319
[1682]	320	INTEGER(iwp) :: nbgp_local !< number of ghost points
[1677]	321
	322	INTEGER(iwp), DIMENSION(nzb:nzt+1,nys-nbgp_local:nyn+nbgp_local, &
[1682]	323	nxl-nbgp_local:nxr+nbgp_local) :: ar !< treated array
[1677]	324
	325
	326	#if defined( __parallel )
	327	IF ( pdims(1) == 1 ) THEN
	328	!
	329	!-- One-dimensional decomposition along y, boundary values can be exchanged
	330	!-- within the PE memory
	331	IF ( bc_lr_cyc ) THEN
	332	ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr)
	333	ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1)
	334	ENDIF
	335	ELSE
	336	!
	337	!-- Send left boundary, receive right one (synchronous)
	338	CALL MPI_SENDRECV( &
	339	ar(nzb,nys-nbgp_local,nxl), 1, type_yz_int, pleft, 0, &
	340	ar(nzb,nys-nbgp_local,nxr+1), 1, type_yz_int, pright, 0, &
	341	comm2d, status, ierr )
	342	!
	343	!-- Send right boundary, receive left one (synchronous)
	344	CALL MPI_SENDRECV( &
	345	ar(nzb,nys-nbgp_local,nxr+1-nbgp_local), 1, type_yz_int, pright, 1, &
	346	ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, type_yz_int, pleft, 1, &
	347	comm2d, status, ierr )
	348	ENDIF
	349
	350
	351	IF ( pdims(2) == 1 ) THEN
	352	!
	353	!-- One-dimensional decomposition along x, boundary values can be exchanged
	354	!-- within the PE memory
	355	IF ( bc_ns_cyc ) THEN
	356	ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:)
	357	ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:)
	358	ENDIF
	359
	360	ELSE
	361
	362	!
	363	!-- Send front boundary, receive rear one (synchronous)
	364	CALL MPI_SENDRECV( &
	365	ar(nzb,nys,nxl-nbgp_local), 1, type_xz_int, psouth, 0, &
	366	ar(nzb,nyn+1,nxl-nbgp_local), 1, type_xz_int, pnorth, 0, &
	367	comm2d, status, ierr )
	368	!
	369	!-- Send rear boundary, receive front one (synchronous)
	370	CALL MPI_SENDRECV( ar(nzb,nyn-nbgp_local+1,nxl-nbgp_local), 1, &
	371	type_xz_int, pnorth, 1, &
	372	ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, &
	373	type_xz_int, psouth, 1, &
	374	comm2d, status, ierr )
	375
	376	ENDIF
	377
	378	#else
	379
	380	IF ( bc_lr == 'cyclic' ) THEN
	381	ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr)
	382	ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1)
	383	ENDIF
	384
	385	IF ( bc_ns == 'cyclic' ) THEN
	386	ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:)
	387	ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:)
	388	ENDIF
	389
	390	#endif
	391
	392
[1933]	393	END SUBROUTINE exchange_horiz_int

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