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source: palm/trunk/SOURCE/init_pegrid.f90 @ 149

Last change on this file since 149 was 145, checked in by raasch, 17 years ago
second preliminary update for turbulent inflow
Property svn:keywords set to `Id`
File size: 32.0 KB

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1	SUBROUTINE init_pegrid
2
3	!------------------------------------------------------------------------------!
4	! Actual revisions:
5	! -----------------
6	! Collect on PE0 horizontal index bounds from all other PEs
7	! TEST OUTPUT (TO BE REMOVED) logging mpi2 ierr values
8	!
9	! Former revisions:
10	! -----------------
11	! $Id: init_pegrid.f90 145 2008-01-09 08:17:38Z letzel $
12	!
13	! 114 2007-10-10 00:03:15Z raasch
14	! Allocation of wall flag arrays for multigrid solver
15	!
16	! 108 2007-08-24 15:10:38Z letzel
17	! Intercommunicator (comm_inter) and derived data type (type_xy) for
18	! coupled model runs created, assign coupling_mode_remote,
19	! indices nxlu and nysv are calculated (needed for non-cyclic boundary
20	! conditions)
21	!
22	! 82 2007-04-16 15:40:52Z raasch
23	! Cpp-directive lcmuk changed to intel_openmp_bug, setting of host on lcmuk by
24	! cpp-directive removed
25	!
26	! 75 2007-03-22 09:54:05Z raasch
27	! uxrp, vynp eliminated,
28	! dirichlet/neumann changed to dirichlet/radiation, etc.,
29	! poisfft_init is only called if fft-solver is switched on
30	!
31	! RCS Log replace by Id keyword, revision history cleaned up
32	!
33	! Revision 1.28 2006/04/26 13:23:32 raasch
34	! lcmuk does not understand the !$ comment so a cpp-directive is required
35	!
36	! Revision 1.1 1997/07/24 11:15:09 raasch
37	! Initial revision
38	!
39	!
40	! Description:
41	! ------------
42	! Determination of the virtual processor topology (if not prescribed by the
43	! user)and computation of the grid point number and array bounds of the local
44	! domains.
45	!------------------------------------------------------------------------------!
46
47	USE control_parameters
48	USE fft_xy
49	USE indices
50	USE pegrid
51	USE poisfft_mod
52	USE poisfft_hybrid_mod
53	USE statistics
54	USE transpose_indices
55
56
57	IMPLICIT NONE
58
59	INTEGER :: gathered_size, i, ind(5), j, k, maximum_grid_level_l, &
60	mg_switch_to_pe0_level_l, mg_levels_x, mg_levels_y, &
61	mg_levels_z, nnx_y, nnx_z, nny_x, nny_z, nnz_x, nnz_y, &
62	numproc_sqr, nx_total, nxl_l, nxr_l, nyn_l, nys_l, nzb_l, &
63	nzt_l, omp_get_num_threads, subdomain_size
64
65	INTEGER, DIMENSION(:), ALLOCATABLE :: ind_all, nxlf, nxrf, nynf, nysf
66
67	LOGICAL :: found
68
69	!
70	!-- Get the number of OpenMP threads
71	!$OMP PARALLEL
72	#if defined( __intel_openmp_bug )
73	threads_per_task = omp_get_num_threads()
74	#else
75	!$ threads_per_task = omp_get_num_threads()
76	#endif
77	!$OMP END PARALLEL
78
79
80	#if defined( __parallel )
81	!
82	!-- Determine the processor topology or check it, if prescribed by the user
83	IF ( npex == -1 .AND. npey == -1 ) THEN
84
85	!
86	!-- Automatic determination of the topology
87	!-- The default on SMP- and cluster-hosts is a 1d-decomposition along x
88	IF ( host(1:3) == 'ibm' .OR. host(1:3) == 'nec' .OR. &
89	host(1:2) == 'lc' .OR. host(1:3) == 'dec' ) THEN
90
91	pdims(1) = numprocs
92	pdims(2) = 1
93
94	ELSE
95
96	numproc_sqr = SQRT( REAL( numprocs ) )
97	pdims(1) = MAX( numproc_sqr , 1 )
98	DO WHILE ( MOD( numprocs , pdims(1) ) /= 0 )
99	pdims(1) = pdims(1) - 1
100	ENDDO
101	pdims(2) = numprocs / pdims(1)
102
103	ENDIF
104
105	ELSEIF ( npex /= -1 .AND. npey /= -1 ) THEN
106
107	!
108	!-- Prescribed by user. Number of processors on the prescribed topology
109	!-- must be equal to the number of PEs available to the job
110	IF ( ( npex * npey ) /= numprocs ) THEN
111	PRINT*, '+++ init_pegrid:'
112	PRINT, ' number of PEs of the prescribed topology (', npexnpey, &
113	') does not match the number of PEs available to the ', &
114	'job (', numprocs, ')'
115	CALL local_stop
116	ENDIF
117	pdims(1) = npex
118	pdims(2) = npey
119
120	ELSE
121	!
122	!-- If the processor topology is prescribed by the user, the number of
123	!-- PEs must be given in both directions
124	PRINT*, '+++ init_pegrid:'
125	PRINT*, ' if the processor topology is prescribed by the user, ', &
126	'both values of "npex" and "npey" must be given in the ', &
127	'NAMELIST-parameter file'
128	CALL local_stop
129
130	ENDIF
131
132	!
133	!-- The hybrid solver can only be used in case of a 1d-decomposition along x
134	IF ( pdims(2) /= 1 .AND. psolver == 'poisfft_hybrid' ) THEN
135	IF ( myid == 0 ) THEN
136	PRINT, '** init_pegrid: psolver = "poisfft_hybrid" can only be'
137	PRINT*, ' used in case of a 1d-decomposition along x'
138	ENDIF
139	ENDIF
140
141	!
142	!-- If necessary, set horizontal boundary conditions to non-cyclic
143	IF ( bc_lr /= 'cyclic' ) cyclic(1) = .FALSE.
144	IF ( bc_ns /= 'cyclic' ) cyclic(2) = .FALSE.
145
146	!
147	!-- Create the virtual processor grid
148	CALL MPI_CART_CREATE( comm_palm, ndim, pdims, cyclic, reorder, &
149	comm2d, ierr )
150	CALL MPI_COMM_RANK( comm2d, myid, ierr )
151	WRITE (myid_char,'(''_'',I4.4)') myid
152
153	CALL MPI_CART_COORDS( comm2d, myid, ndim, pcoord, ierr )
154	CALL MPI_CART_SHIFT( comm2d, 0, 1, pleft, pright, ierr )
155	CALL MPI_CART_SHIFT( comm2d, 1, 1, psouth, pnorth, ierr )
156
157	!
158	!-- Determine sub-topologies for transpositions
159	!-- Transposition from z to x:
160	remain_dims(1) = .TRUE.
161	remain_dims(2) = .FALSE.
162	CALL MPI_CART_SUB( comm2d, remain_dims, comm1dx, ierr )
163	CALL MPI_COMM_RANK( comm1dx, myidx, ierr )
164	!
165	!-- Transposition from x to y
166	remain_dims(1) = .FALSE.
167	remain_dims(2) = .TRUE.
168	CALL MPI_CART_SUB( comm2d, remain_dims, comm1dy, ierr )
169	CALL MPI_COMM_RANK( comm1dy, myidy, ierr )
170
171
172	!
173	!-- Find a grid (used for array d) which will match the transposition demands
174	IF ( grid_matching == 'strict' ) THEN
175
176	nxa = nx; nya = ny; nza = nz
177
178	ELSE
179
180	found = .FALSE.
181	xn: DO nxa = nx, 2*nx
182	!
183	!-- Meet conditions for nx
184	IF ( MOD( nxa+1, pdims(1) ) /= 0 .OR. &
185	MOD( nxa+1, pdims(2) ) /= 0 ) CYCLE xn
186
187	yn: DO nya = ny, 2*ny
188	!
189	!-- Meet conditions for ny
190	IF ( MOD( nya+1, pdims(2) ) /= 0 .OR. &
191	MOD( nya+1, pdims(1) ) /= 0 ) CYCLE yn
192
193
194	zn: DO nza = nz, 2*nz
195	!
196	!-- Meet conditions for nz
197	IF ( ( MOD( nza, pdims(1) ) /= 0 .AND. pdims(1) /= 1 .AND. &
198	pdims(2) /= 1 ) .OR. &
199	( MOD( nza, pdims(2) ) /= 0 .AND. dt_dosp /= 9999999.9 &
200	) ) THEN
201	CYCLE zn
202	ELSE
203	found = .TRUE.
204	EXIT xn
205	ENDIF
206
207	ENDDO zn
208
209	ENDDO yn
210
211	ENDDO xn
212
213	IF ( .NOT. found ) THEN
214	IF ( myid == 0 ) THEN
215	PRINT*,'+++ init_pegrid: no matching grid for transpositions found'
216	ENDIF
217	CALL local_stop
218	ENDIF
219
220	ENDIF
221
222	!
223	!-- Calculate array bounds in x-direction for every PE.
224	!-- The last PE along x may get less grid points than the others
225	ALLOCATE( nxlf(0:pdims(1)-1), nxrf(0:pdims(1)-1), nynf(0:pdims(2)-1), &
226	nysf(0:pdims(2)-1), nnx_pe(0:pdims(1)-1), nny_pe(0:pdims(2)-1) )
227
228	IF ( MOD( nxa+1 , pdims(1) ) /= 0 ) THEN
229	IF ( myid == 0 ) THEN
230	PRINT*,'+++ x-direction: gridpoint number (',nx+1,') is not an'
231	PRINT*,' integral divisor of the number of proces', &
232	&'sors (', pdims(1),')'
233	ENDIF
234	CALL local_stop
235	ELSE
236	nnx = ( nxa + 1 ) / pdims(1)
237	IF ( nnx*pdims(1) - ( nx + 1) > nnx ) THEN
238	IF ( myid == 0 ) THEN
239	PRINT*,'+++ x-direction: nx does not match the requirements ', &
240	'given by the number of PEs'
241	PRINT*,' used'
242	PRINT,' please use nx = ', nx - ( pdims(1) - ( nnxpdims(1) &
243	- ( nx + 1 ) ) ), ' instead of nx =', nx
244	ENDIF
245	CALL local_stop
246	ENDIF
247	ENDIF
248
249	!
250	!-- Left and right array bounds, number of gridpoints
251	DO i = 0, pdims(1)-1
252	nxlf(i) = i * nnx
253	nxrf(i) = ( i + 1 ) * nnx - 1
254	nnx_pe(i) = MIN( nx, nxrf(i) ) - nxlf(i) + 1
255	ENDDO
256
257	!
258	!-- Calculate array bounds in y-direction for every PE.
259	IF ( MOD( nya+1 , pdims(2) ) /= 0 ) THEN
260	IF ( myid == 0 ) THEN
261	PRINT*,'+++ y-direction: gridpoint number (',ny+1,') is not an'
262	PRINT*,' integral divisor of the number of proces', &
263	&'sors (', pdims(2),')'
264	ENDIF
265	CALL local_stop
266	ELSE
267	nny = ( nya + 1 ) / pdims(2)
268	IF ( nny*pdims(2) - ( ny + 1) > nny ) THEN
269	IF ( myid == 0 ) THEN
270	PRINT*,'+++ x-direction: nx does not match the requirements ', &
271	'given by the number of PEs'
272	PRINT*,' used'
273	PRINT,' please use nx = ', nx - ( pdims(1) - ( nnxpdims(1) &
274	- ( nx + 1 ) ) ), ' instead of nx =', nx
275	ENDIF
276	CALL local_stop
277	ENDIF
278	ENDIF
279
280	!
281	!-- South and north array bounds
282	DO j = 0, pdims(2)-1
283	nysf(j) = j * nny
284	nynf(j) = ( j + 1 ) * nny - 1
285	nny_pe(j) = MIN( ny, nynf(j) ) - nysf(j) + 1
286	ENDDO
287
288	!
289	!-- Local array bounds of the respective PEs
290	nxl = nxlf(pcoord(1))
291	nxra = nxrf(pcoord(1))
292	nxr = MIN( nx, nxra )
293	nys = nysf(pcoord(2))
294	nyna = nynf(pcoord(2))
295	nyn = MIN( ny, nyna )
296	nzb = 0
297	nzta = nza
298	nzt = MIN( nz, nzta )
299	nnz = nza
300
301	!
302	!-- Calculate array bounds and gridpoint numbers for the transposed arrays
303	!-- (needed in the pressure solver)
304	!-- For the transposed arrays, cyclic boundaries as well as top and bottom
305	!-- boundaries are omitted, because they are obstructive to the transposition
306
307	!
308	!-- 1. transposition z --> x
309	!-- This transposition is not neccessary in case of a 1d-decomposition along x,
310	!-- except that the uptream-spline method is switched on
311	IF ( pdims(2) /= 1 .OR. momentum_advec == 'ups-scheme' .OR. &
312	scalar_advec == 'ups-scheme' ) THEN
313
314	IF ( pdims(2) == 1 .AND. ( momentum_advec == 'ups-scheme' .OR. &
315	scalar_advec == 'ups-scheme' ) ) THEN
316	IF ( myid == 0 ) THEN
317	PRINT*,'+++ WARNING: init_pegrid: 1d-decomposition along x ', &
318	&'chosen but nz restrictions may occur'
319	PRINT*,' since ups-scheme is activated'
320	ENDIF
321	ENDIF
322	nys_x = nys
323	nyn_xa = nyna
324	nyn_x = nyn
325	nny_x = nny
326	IF ( MOD( nza , pdims(1) ) /= 0 ) THEN
327	IF ( myid == 0 ) THEN
328	PRINT*,'+++ transposition z --> x:'
329	PRINT*,' nz=',nz,' is not an integral divisior of pdims(1)=', &
330	&pdims(1)
331	ENDIF
332	CALL local_stop
333	ENDIF
334	nnz_x = nza / pdims(1)
335	nzb_x = 1 + myidx * nnz_x
336	nzt_xa = ( myidx + 1 ) * nnz_x
337	nzt_x = MIN( nzt, nzt_xa )
338
339	sendrecvcount_zx = nnx * nny * nnz_x
340
341	ENDIF
342
343	!
344	!-- 2. transposition x --> y
345	nnz_y = nnz_x
346	nzb_y = nzb_x
347	nzt_ya = nzt_xa
348	nzt_y = nzt_x
349	IF ( MOD( nxa+1 , pdims(2) ) /= 0 ) THEN
350	IF ( myid == 0 ) THEN
351	PRINT*,'+++ transposition x --> y:'
352	PRINT*,' nx+1=',nx+1,' is not an integral divisor of ',&
353	&'pdims(2)=',pdims(2)
354	ENDIF
355	CALL local_stop
356	ENDIF
357	nnx_y = (nxa+1) / pdims(2)
358	nxl_y = myidy * nnx_y
359	nxr_ya = ( myidy + 1 ) * nnx_y - 1
360	nxr_y = MIN( nx, nxr_ya )
361
362	sendrecvcount_xy = nnx_y * nny_x * nnz_y
363
364	!
365	!-- 3. transposition y --> z (ELSE: x --> y in case of 1D-decomposition
366	!-- along x)
367	IF ( pdims(2) /= 1 .OR. momentum_advec == 'ups-scheme' .OR. &
368	scalar_advec == 'ups-scheme' ) THEN
369	!
370	!-- y --> z
371	!-- This transposition is not neccessary in case of a 1d-decomposition
372	!-- along x, except that the uptream-spline method is switched on
373	nnx_z = nnx_y
374	nxl_z = nxl_y
375	nxr_za = nxr_ya
376	nxr_z = nxr_y
377	IF ( MOD( nya+1 , pdims(1) ) /= 0 ) THEN
378	IF ( myid == 0 ) THEN
379	PRINT*,'+++ Transposition y --> z:'
380	PRINT*,' ny+1=',ny+1,' is not an integral divisor of ',&
381	&'pdims(1)=',pdims(1)
382	ENDIF
383	CALL local_stop
384	ENDIF
385	nny_z = (nya+1) / pdims(1)
386	nys_z = myidx * nny_z
387	nyn_za = ( myidx + 1 ) * nny_z - 1
388	nyn_z = MIN( ny, nyn_za )
389
390	sendrecvcount_yz = nnx_y * nny_z * nnz_y
391
392	ELSE
393	!
394	!-- x --> y. This condition must be fulfilled for a 1D-decomposition along x
395	IF ( MOD( nya+1 , pdims(1) ) /= 0 ) THEN
396	IF ( myid == 0 ) THEN
397	PRINT*,'+++ Transposition x --> y:'
398	PRINT*,' ny+1=',ny+1,' is not an integral divisor of ',&
399	&'pdims(1)=',pdims(1)
400	ENDIF
401	CALL local_stop
402	ENDIF
403
404	ENDIF
405
406	!
407	!-- Indices for direct transpositions z --> y (used for calculating spectra)
408	IF ( dt_dosp /= 9999999.9 ) THEN
409	IF ( MOD( nza, pdims(2) ) /= 0 ) THEN
410	IF ( myid == 0 ) THEN
411	PRINT*,'+++ Direct transposition z --> y (needed for spectra):'
412	PRINT*,' nz=',nz,' is not an integral divisor of ',&
413	&'pdims(2)=',pdims(2)
414	ENDIF
415	CALL local_stop
416	ELSE
417	nxl_yd = nxl
418	nxr_yda = nxra
419	nxr_yd = nxr
420	nzb_yd = 1 + myidy * ( nza / pdims(2) )
421	nzt_yda = ( myidy + 1 ) * ( nza / pdims(2) )
422	nzt_yd = MIN( nzt, nzt_yda )
423
424	sendrecvcount_zyd = nnx * nny * ( nza / pdims(2) )
425	ENDIF
426	ENDIF
427
428	!
429	!-- Indices for direct transpositions y --> x (they are only possible in case
430	!-- of a 1d-decomposition along x)
431	IF ( pdims(2) == 1 ) THEN
432	nny_x = nny / pdims(1)
433	nys_x = myid * nny_x
434	nyn_xa = ( myid + 1 ) * nny_x - 1
435	nyn_x = MIN( ny, nyn_xa )
436	nzb_x = 1
437	nzt_xa = nza
438	nzt_x = nz
439	sendrecvcount_xy = nnx * nny_x * nza
440	ENDIF
441
442	!
443	!-- Indices for direct transpositions x --> y (they are only possible in case
444	!-- of a 1d-decomposition along y)
445	IF ( pdims(1) == 1 ) THEN
446	nnx_y = nnx / pdims(2)
447	nxl_y = myid * nnx_y
448	nxr_ya = ( myid + 1 ) * nnx_y - 1
449	nxr_y = MIN( nx, nxr_ya )
450	nzb_y = 1
451	nzt_ya = nza
452	nzt_y = nz
453	sendrecvcount_xy = nnx_y * nny * nza
454	ENDIF
455
456	!
457	!-- Arrays for storing the array bounds are needed any more
458	DEALLOCATE( nxlf , nxrf , nynf , nysf )
459
460	!
461	!-- Collect index bounds from other PEs (to be written to restart file later)
462	ALLOCATE( hor_index_bounds(4,0:numprocs-1) )
463
464	IF ( myid == 0 ) THEN
465
466	hor_index_bounds(1,0) = nxl
467	hor_index_bounds(2,0) = nxr
468	hor_index_bounds(3,0) = nys
469	hor_index_bounds(4,0) = nyn
470
471	!
472	!-- Receive data from all other PEs
473	DO i = 1, numprocs-1
474	CALL MPI_RECV( ibuf, 4, MPI_INTEGER, i, MPI_ANY_TAG, comm2d, status, &
475	ierr )
476	hor_index_bounds(:,i) = ibuf(1:4)
477	ENDDO
478
479	ELSE
480	!
481	!-- Send index bounds to PE0
482	ibuf(1) = nxl
483	ibuf(2) = nxr
484	ibuf(3) = nys
485	ibuf(4) = nyn
486	CALL MPI_SEND( ibuf, 4, MPI_INTEGER, 0, myid, comm2d, ierr )
487
488	ENDIF
489
490	#if defined( __print )
491	!
492	!-- Control output
493	IF ( myid == 0 ) THEN
494	PRINT, ' processor topology *'
495	PRINT*, ' '
496	PRINT*, 'myid pcoord left right south north idx idy nxl: nxr',&
497	&' nys: nyn'
498	PRINT*, '------------------------------------------------------------',&
499	&'-----------'
500	WRITE (*,1000) 0, pcoord(1), pcoord(2), pleft, pright, psouth, pnorth, &
501	myidx, myidy, nxl, nxr, nys, nyn
502	1000 FORMAT (I4,2X,'(',I3,',',I3,')',3X,I4,2X,I4,3X,I4,2X,I4,2X,I3,1X,I3, &
503	2(2X,I4,':',I4))
504
505	!
506	!-- Receive data from the other PEs
507	DO i = 1,numprocs-1
508	CALL MPI_RECV( ibuf, 12, MPI_INTEGER, i, MPI_ANY_TAG, comm2d, status, &
509	ierr )
510	WRITE (*,1000) i, ( ibuf(j) , j = 1,12 )
511	ENDDO
512	ELSE
513
514	!
515	!-- Send data to PE0
516	ibuf(1) = pcoord(1); ibuf(2) = pcoord(2); ibuf(3) = pleft
517	ibuf(4) = pright; ibuf(5) = psouth; ibuf(6) = pnorth; ibuf(7) = myidx
518	ibuf(8) = myidy; ibuf(9) = nxl; ibuf(10) = nxr; ibuf(11) = nys
519	ibuf(12) = nyn
520	CALL MPI_SEND( ibuf, 12, MPI_INTEGER, 0, myid, comm2d, ierr )
521	ENDIF
522	#endif
523
524	#if defined( __mpi2 )
525	!
526	!-- In case of coupled runs, get the port name on PE0 of the atmosphere model
527	!-- and pass it to PE0 of the ocean model
528	IF ( myid == 0 ) THEN
529
530	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
531
532	CALL MPI_OPEN_PORT( MPI_INFO_NULL, port_name, ierr )
533	!
534	!-- TEST OUTPUT (TO BE REMOVED)
535	WRITE(9,*) TRIM( coupling_mode ), &
536	', ierr after MPI_OPEN_PORT: ', ierr
537	CALL LOCAL_FLUSH( 9 )
538
539	CALL MPI_PUBLISH_NAME( 'palm_coupler', MPI_INFO_NULL, port_name, &
540	ierr )
541	!
542	!-- TEST OUTPUT (TO BE REMOVED)
543	WRITE(9,*) TRIM( coupling_mode ), &
544	', ierr after MPI_PUBLISH_NAME: ', ierr
545	CALL LOCAL_FLUSH( 9 )
546
547	!
548	!-- Write a flag file for the ocean model and the other atmosphere
549	!-- processes.
550	!-- There seems to be a bug in MPICH2 which causes hanging processes
551	!-- in case that execution of LOOKUP_NAME is continued too early
552	!-- (i.e. before the port has been created)
553	OPEN( 90, FILE='COUPLING_PORT_OPENED', FORM='FORMATTED' )
554	WRITE ( 90, '(''TRUE'')' )
555	CLOSE ( 90 )
556
557	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
558
559	!
560	!-- Continue only if the atmosphere model has created the port.
561	!-- There seems to be a bug in MPICH2 which causes hanging processes
562	!-- in case that execution of LOOKUP_NAME is continued too early
563	!-- (i.e. before the port has been created)
564	INQUIRE( FILE='COUPLING_PORT_OPENED', EXIST=found )
565	DO WHILE ( .NOT. found )
566	INQUIRE( FILE='COUPLING_PORT_OPENED', EXIST=found )
567	ENDDO
568
569	CALL MPI_LOOKUP_NAME( 'palm_coupler', MPI_INFO_NULL, port_name, ierr )
570	!
571	!-- TEST OUTPUT (TO BE REMOVED)
572	WRITE(9,*) TRIM( coupling_mode ), &
573	', ierr after MPI_LOOKUP_NAME: ', ierr
574	CALL LOCAL_FLUSH( 9 )
575
576
577	ENDIF
578
579	ENDIF
580
581	!
582	!-- In case of coupled runs, establish the connection between the atmosphere
583	!-- and the ocean model and define the intercommunicator (comm_inter)
584	CALL MPI_BARRIER( comm2d, ierr )
585	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
586
587	print*, '... before COMM_ACCEPT'
588	CALL MPI_COMM_ACCEPT( port_name, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &
589	comm_inter, ierr )
590	print*, '--- ierr = ', ierr
591	print*, '--- comm_inter atmosphere = ', comm_inter
592
593	coupling_mode_remote = 'ocean_to_atmosphere'
594
595	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
596
597	IF ( myid == 0 ) PRINT, '** read: ', port_name, ' ierr = ', ierr
598	print*, '... before COMM_CONNECT'
599	CALL MPI_COMM_CONNECT( port_name, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &
600	comm_inter, ierr )
601	print*, '--- ierr = ', ierr
602	print*, '--- comm_inter ocean = ', comm_inter
603
604	coupling_mode_remote = 'atmosphere_to_ocean'
605
606	ENDIF
607
608	!
609	!-- In case of coupled runs, create a new MPI derived datatype for the
610	!-- exchange of surface (xy) data .
611	!-- Gridpoint number for the exchange of ghost points (xy-plane)
612	ngp_xy = ( nxr - nxl + 3 ) * ( nyn - nys + 3 )
613
614	!
615	!-- Define a new MPI derived datatype for the exchange of ghost points in
616	!-- y-direction for 2D-arrays (line)
617	CALL MPI_TYPE_VECTOR( ngp_xy, 1, nzt-nzb+2, MPI_REAL, type_xy, ierr )
618	CALL MPI_TYPE_COMMIT( type_xy, ierr )
619	#endif
620
621	#else
622
623	!
624	!-- Array bounds when running on a single PE (respectively a non-parallel
625	!-- machine)
626	nxl = 0
627	nxr = nx
628	nxra = nx
629	nnx = nxr - nxl + 1
630	nys = 0
631	nyn = ny
632	nyna = ny
633	nny = nyn - nys + 1
634	nzb = 0
635	nzt = nz
636	nzta = nz
637	nnz = nz
638
639	ALLOCATE( hor_index_bounds(4,0:0) )
640	hor_index_bounds(1,0) = nxl
641	hor_index_bounds(2,0) = nxr
642	hor_index_bounds(3,0) = nys
643	hor_index_bounds(4,0) = nyn
644
645	!
646	!-- Array bounds for the pressure solver (in the parallel code, these bounds
647	!-- are the ones for the transposed arrays)
648	nys_x = nys
649	nyn_x = nyn
650	nyn_xa = nyn
651	nzb_x = nzb + 1
652	nzt_x = nzt
653	nzt_xa = nzt
654
655	nxl_y = nxl
656	nxr_y = nxr
657	nxr_ya = nxr
658	nzb_y = nzb + 1
659	nzt_y = nzt
660	nzt_ya = nzt
661
662	nxl_z = nxl
663	nxr_z = nxr
664	nxr_za = nxr
665	nys_z = nys
666	nyn_z = nyn
667	nyn_za = nyn
668
669	#endif
670
671	!
672	!-- Calculate number of grid levels necessary for the multigrid poisson solver
673	!-- as well as the gridpoint indices on each level
674	IF ( psolver == 'multigrid' ) THEN
675
676	!
677	!-- First calculate number of possible grid levels for the subdomains
678	mg_levels_x = 1
679	mg_levels_y = 1
680	mg_levels_z = 1
681
682	i = nnx
683	DO WHILE ( MOD( i, 2 ) == 0 .AND. i /= 2 )
684	i = i / 2
685	mg_levels_x = mg_levels_x + 1
686	ENDDO
687
688	j = nny
689	DO WHILE ( MOD( j, 2 ) == 0 .AND. j /= 2 )
690	j = j / 2
691	mg_levels_y = mg_levels_y + 1
692	ENDDO
693
694	k = nnz
695	DO WHILE ( MOD( k, 2 ) == 0 .AND. k /= 2 )
696	k = k / 2
697	mg_levels_z = mg_levels_z + 1
698	ENDDO
699
700	maximum_grid_level = MIN( mg_levels_x, mg_levels_y, mg_levels_z )
701
702	!
703	!-- Find out, if the total domain allows more levels. These additional
704	!-- levels are processed on PE0 only.
705	IF ( numprocs > 1 ) THEN
706	IF ( mg_levels_z > MIN( mg_levels_x, mg_levels_y ) ) THEN
707	mg_switch_to_pe0_level_l = maximum_grid_level
708
709	mg_levels_x = 1
710	mg_levels_y = 1
711
712	i = nx+1
713	DO WHILE ( MOD( i, 2 ) == 0 .AND. i /= 2 )
714	i = i / 2
715	mg_levels_x = mg_levels_x + 1
716	ENDDO
717
718	j = ny+1
719	DO WHILE ( MOD( j, 2 ) == 0 .AND. j /= 2 )
720	j = j / 2
721	mg_levels_y = mg_levels_y + 1
722	ENDDO
723
724	maximum_grid_level_l = MIN( mg_levels_x, mg_levels_y, mg_levels_z )
725
726	IF ( maximum_grid_level_l > mg_switch_to_pe0_level_l ) THEN
727	mg_switch_to_pe0_level_l = maximum_grid_level_l - &
728	mg_switch_to_pe0_level_l + 1
729	ELSE
730	mg_switch_to_pe0_level_l = 0
731	ENDIF
732	ELSE
733	mg_switch_to_pe0_level_l = 0
734	maximum_grid_level_l = maximum_grid_level
735	ENDIF
736
737	!
738	!-- Use switch level calculated above only if it is not pre-defined
739	!-- by user
740	IF ( mg_switch_to_pe0_level == 0 ) THEN
741
742	IF ( mg_switch_to_pe0_level_l /= 0 ) THEN
743	mg_switch_to_pe0_level = mg_switch_to_pe0_level_l
744	maximum_grid_level = maximum_grid_level_l
745	ENDIF
746
747	ELSE
748	!
749	!-- Check pre-defined value and reset to default, if neccessary
750	IF ( mg_switch_to_pe0_level < mg_switch_to_pe0_level_l .OR. &
751	mg_switch_to_pe0_level >= maximum_grid_level_l ) THEN
752	IF ( myid == 0 ) THEN
753	PRINT*, '+++ WARNING init_pegrid: mg_switch_to_pe0_level ', &
754	'out of range and reset to default (=0)'
755	ENDIF
756	mg_switch_to_pe0_level = 0
757	ELSE
758	!
759	!-- Use the largest number of possible levels anyway and recalculate
760	!-- the switch level to this largest number of possible values
761	maximum_grid_level = maximum_grid_level_l
762
763	ENDIF
764	ENDIF
765
766	ENDIF
767
768	ALLOCATE( grid_level_count(maximum_grid_level), &
769	nxl_mg(maximum_grid_level), nxr_mg(maximum_grid_level), &
770	nyn_mg(maximum_grid_level), nys_mg(maximum_grid_level), &
771	nzt_mg(maximum_grid_level) )
772
773	grid_level_count = 0
774	nxl_l = nxl; nxr_l = nxr; nys_l = nys; nyn_l = nyn; nzt_l = nzt
775
776	DO i = maximum_grid_level, 1 , -1
777
778	IF ( i == mg_switch_to_pe0_level ) THEN
779	#if defined( __parallel )
780	!
781	!-- Save the grid size of the subdomain at the switch level, because
782	!-- it is needed in poismg.
783	!-- Array bounds of the local subdomain grids are gathered on PE0
784	ind(1) = nxl_l; ind(2) = nxr_l
785	ind(3) = nys_l; ind(4) = nyn_l
786	ind(5) = nzt_l
787	ALLOCATE( ind_all(5*numprocs), mg_loc_ind(5,0:numprocs-1) )
788	CALL MPI_ALLGATHER( ind, 5, MPI_INTEGER, ind_all, 5, &
789	MPI_INTEGER, comm2d, ierr )
790	DO j = 0, numprocs-1
791	DO k = 1, 5
792	mg_loc_ind(k,j) = ind_all(k+j*5)
793	ENDDO
794	ENDDO
795	DEALLOCATE( ind_all )
796	!
797	!-- Calculate the grid size of the total domain gathered on PE0
798	nxr_l = ( nxr_l-nxl_l+1 ) * pdims(1) - 1
799	nxl_l = 0
800	nyn_l = ( nyn_l-nys_l+1 ) * pdims(2) - 1
801	nys_l = 0
802	!
803	!-- The size of this gathered array must not be larger than the
804	!-- array tend, which is used in the multigrid scheme as a temporary
805	!-- array
806	subdomain_size = ( nxr - nxl + 3 ) * ( nyn - nys + 3 ) * &
807	( nzt - nzb + 2 )
808	gathered_size = ( nxr_l - nxl_l + 3 ) * ( nyn_l - nys_l + 3 ) * &
809	( nzt_l - nzb + 2 )
810
811	IF ( gathered_size > subdomain_size ) THEN
812	IF ( myid == 0 ) THEN
813	PRINT*, '+++ init_pegrid: not enough memory for storing ', &
814	'gathered multigrid data on PE0'
815	ENDIF
816	CALL local_stop
817	ENDIF
818	#else
819	PRINT*, '+++ init_pegrid: multigrid gather/scatter impossible ', &
820	'in non parallel mode'
821	CALL local_stop
822	#endif
823	ENDIF
824
825	nxl_mg(i) = nxl_l
826	nxr_mg(i) = nxr_l
827	nys_mg(i) = nys_l
828	nyn_mg(i) = nyn_l
829	nzt_mg(i) = nzt_l
830
831	nxl_l = nxl_l / 2
832	nxr_l = nxr_l / 2
833	nys_l = nys_l / 2
834	nyn_l = nyn_l / 2
835	nzt_l = nzt_l / 2
836	ENDDO
837
838	ELSE
839
840	maximum_grid_level = 1
841
842	ENDIF
843
844	grid_level = maximum_grid_level
845
846	#if defined( __parallel )
847	!
848	!-- Gridpoint number for the exchange of ghost points (y-line for 2D-arrays)
849	ngp_y = nyn - nys + 1
850
851	!
852	!-- Define a new MPI derived datatype for the exchange of ghost points in
853	!-- y-direction for 2D-arrays (line)
854	CALL MPI_TYPE_VECTOR( nxr-nxl+3, 1, ngp_y+2, MPI_REAL, type_x, ierr )
855	CALL MPI_TYPE_COMMIT( type_x, ierr )
856	CALL MPI_TYPE_VECTOR( nxr-nxl+3, 1, ngp_y+2, MPI_INTEGER, type_x_int, ierr )
857	CALL MPI_TYPE_COMMIT( type_x_int, ierr )
858
859	!
860	!-- Calculate gridpoint numbers for the exchange of ghost points along x
861	!-- (yz-plane for 3D-arrays) and define MPI derived data type(s) for the
862	!-- exchange of ghost points in y-direction (xz-plane).
863	!-- Do these calculations for the model grid and (if necessary) also
864	!-- for the coarser grid levels used in the multigrid method
865	ALLOCATE ( ngp_yz(maximum_grid_level), type_xz(maximum_grid_level) )
866
867	nxl_l = nxl; nxr_l = nxr; nys_l = nys; nyn_l = nyn; nzb_l = nzb; nzt_l = nzt
868
869	DO i = maximum_grid_level, 1 , -1
870	ngp_yz(i) = (nzt_l - nzb_l + 2) * (nyn_l - nys_l + 3)
871
872	CALL MPI_TYPE_VECTOR( nxr_l-nxl_l+3, nzt_l-nzb_l+2, ngp_yz(i), &
873	MPI_REAL, type_xz(i), ierr )
874	CALL MPI_TYPE_COMMIT( type_xz(i), ierr )
875
876	nxl_l = nxl_l / 2
877	nxr_l = nxr_l / 2
878	nys_l = nys_l / 2
879	nyn_l = nyn_l / 2
880	nzt_l = nzt_l / 2
881	ENDDO
882	#endif
883
884	#if defined( __parallel )
885	!
886	!-- Setting of flags for inflow/outflow conditions in case of non-cyclic
887	!-- horizontal boundary conditions.
888	IF ( pleft == MPI_PROC_NULL ) THEN
889	IF ( bc_lr == 'dirichlet/radiation' ) THEN
890	inflow_l = .TRUE.
891	ELSEIF ( bc_lr == 'radiation/dirichlet' ) THEN
892	outflow_l = .TRUE.
893	ENDIF
894	ENDIF
895
896	IF ( pright == MPI_PROC_NULL ) THEN
897	IF ( bc_lr == 'dirichlet/radiation' ) THEN
898	outflow_r = .TRUE.
899	ELSEIF ( bc_lr == 'radiation/dirichlet' ) THEN
900	inflow_r = .TRUE.
901	ENDIF
902	ENDIF
903
904	IF ( psouth == MPI_PROC_NULL ) THEN
905	IF ( bc_ns == 'dirichlet/radiation' ) THEN
906	outflow_s = .TRUE.
907	ELSEIF ( bc_ns == 'radiation/dirichlet' ) THEN
908	inflow_s = .TRUE.
909	ENDIF
910	ENDIF
911
912	IF ( pnorth == MPI_PROC_NULL ) THEN
913	IF ( bc_ns == 'dirichlet/radiation' ) THEN
914	inflow_n = .TRUE.
915	ELSEIF ( bc_ns == 'radiation/dirichlet' ) THEN
916	outflow_n = .TRUE.
917	ENDIF
918	ENDIF
919
920	#else
921	IF ( bc_lr == 'dirichlet/radiation' ) THEN
922	inflow_l = .TRUE.
923	outflow_r = .TRUE.
924	ELSEIF ( bc_lr == 'radiation/dirichlet' ) THEN
925	outflow_l = .TRUE.
926	inflow_r = .TRUE.
927	ENDIF
928
929	IF ( bc_ns == 'dirichlet/radiation' ) THEN
930	inflow_n = .TRUE.
931	outflow_s = .TRUE.
932	ELSEIF ( bc_ns == 'radiation/dirichlet' ) THEN
933	outflow_n = .TRUE.
934	inflow_s = .TRUE.
935	ENDIF
936	#endif
937	!
938	!-- At the outflow, u or v, respectively, have to be calculated for one more
939	!-- grid point.
940	IF ( outflow_l ) THEN
941	nxlu = nxl + 1
942	ELSE
943	nxlu = nxl
944	ENDIF
945	IF ( outflow_s ) THEN
946	nysv = nys + 1
947	ELSE
948	nysv = nys
949	ENDIF
950
951	IF ( psolver == 'poisfft_hybrid' ) THEN
952	CALL poisfft_hybrid_ini
953	ELSEIF ( psolver == 'poisfft' ) THEN
954	CALL poisfft_init
955	ENDIF
956
957	!
958	!-- Allocate wall flag arrays used in the multigrid solver
959	IF ( psolver == 'multigrid' ) THEN
960
961	DO i = maximum_grid_level, 1, -1
962
963	SELECT CASE ( i )
964
965	CASE ( 1 )
966	ALLOCATE( wall_flags_1(nzb:nzt_mg(i)+1, &
967	nys_mg(i)-1:nyn_mg(i)+1, &
968	nxl_mg(i)-1:nxr_mg(i)+1) )
969
970	CASE ( 2 )
971	ALLOCATE( wall_flags_2(nzb:nzt_mg(i)+1, &
972	nys_mg(i)-1:nyn_mg(i)+1, &
973	nxl_mg(i)-1:nxr_mg(i)+1) )
974
975	CASE ( 3 )
976	ALLOCATE( wall_flags_3(nzb:nzt_mg(i)+1, &
977	nys_mg(i)-1:nyn_mg(i)+1, &
978	nxl_mg(i)-1:nxr_mg(i)+1) )
979
980	CASE ( 4 )
981	ALLOCATE( wall_flags_4(nzb:nzt_mg(i)+1, &
982	nys_mg(i)-1:nyn_mg(i)+1, &
983	nxl_mg(i)-1:nxr_mg(i)+1) )
984
985	CASE ( 5 )
986	ALLOCATE( wall_flags_5(nzb:nzt_mg(i)+1, &
987	nys_mg(i)-1:nyn_mg(i)+1, &
988	nxl_mg(i)-1:nxr_mg(i)+1) )
989
990	CASE ( 6 )
991	ALLOCATE( wall_flags_6(nzb:nzt_mg(i)+1, &
992	nys_mg(i)-1:nyn_mg(i)+1, &
993	nxl_mg(i)-1:nxr_mg(i)+1) )
994
995	CASE ( 7 )
996	ALLOCATE( wall_flags_7(nzb:nzt_mg(i)+1, &
997	nys_mg(i)-1:nyn_mg(i)+1, &
998	nxl_mg(i)-1:nxr_mg(i)+1) )
999
1000	CASE ( 8 )
1001	ALLOCATE( wall_flags_8(nzb:nzt_mg(i)+1, &
1002	nys_mg(i)-1:nyn_mg(i)+1, &
1003	nxl_mg(i)-1:nxr_mg(i)+1) )
1004
1005	CASE ( 9 )
1006	ALLOCATE( wall_flags_9(nzb:nzt_mg(i)+1, &
1007	nys_mg(i)-1:nyn_mg(i)+1, &
1008	nxl_mg(i)-1:nxr_mg(i)+1) )
1009
1010	CASE ( 10 )
1011	ALLOCATE( wall_flags_10(nzb:nzt_mg(i)+1, &
1012	nys_mg(i)-1:nyn_mg(i)+1, &
1013	nxl_mg(i)-1:nxr_mg(i)+1) )
1014
1015	CASE DEFAULT
1016	IF ( myid == 0 ) PRINT*, '+++ init_pegrid: more than 10 ', &
1017	' multigrid levels'
1018	CALL local_stop
1019
1020	END SELECT
1021
1022	ENDDO
1023
1024	ENDIF
1025
1026	END SUBROUTINE init_pegrid

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