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init_pegrid.f90 @ 1402

Last change on this file since 1402 was 1402, checked in by raasch, 10 years ago

output of location messages complemented, output of location bar added
(Makefile, check_parameters, cpulog, init_pegrid, init_3d_model, message, palm, parin, time_integration, new: progress_bar)
preprocessor switch intel_compiler added, -r8 compiler options removed
(.mrun.config.default, .mrun.config.imuk, .mrun.config.kiaps)

batch_job added to envpar-NAMELIST
(mrun, parin)

Property svn:keywords set to Id

File size: 40.9 KB

Line
1	SUBROUTINE init_pegrid
2
3	!--------------------------------------------------------------------------------!
4	! This file is part of PALM.
5	!
6	! PALM is free software: you can redistribute it and/or modify it under the terms
7	! of the GNU General Public License as published by the Free Software Foundation,
8	! either version 3 of the License, or (at your option) any later version.
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	!
17	! Copyright 1997-2014 Leibniz Universitaet Hannover
18	!--------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	! location messages modified
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: init_pegrid.f90 1402 2014-05-09 14:25:13Z raasch $
27	!
28	! 1384 2014-05-02 14:31:06Z raasch
29	! location messages added
30	!
31	! 1353 2014-04-08 15:21:23Z heinze
32	! REAL constants provided with KIND-attribute
33	!
34	! 1322 2014-03-20 16:38:49Z raasch
35	! REAL functions provided with KIND-attribute
36	!
37	! 1320 2014-03-20 08:40:49Z raasch
38	! ONLY-attribute added to USE-statements,
39	! kind-parameters added to all INTEGER and REAL declaration statements,
40	! kinds are defined in new module kinds,
41	! revision history before 2012 removed,
42	! comment fields (!:) to be used for variable explanations added to
43	! all variable declaration statements
44	!
45	! 1304 2014-03-12 10:29:42Z raasch
46	! bugfix: single core MPI runs missed some settings of transpose indices
47	!
48	! 1212 2013-08-15 08:46:27Z raasch
49	! error message for poisfft_hybrid removed
50	!
51	! 1159 2013-05-21 11:58:22Z fricke
52	! dirichlet/neumann and neumann/dirichlet removed
53	!
54	! 1139 2013-04-18 07:25:03Z raasch
55	! bugfix for calculating the id of the PE carrying the recycling plane
56	!
57	! 1111 2013-03-08 23:54:10Z raasch
58	! initialization of poisfft moved to module poisfft
59	!
60	! 1092 2013-02-02 11:24:22Z raasch
61	! unused variables removed
62	!
63	! 1056 2012-11-16 15:28:04Z raasch
64	! Indices for arrays n.._mg start from zero due to definition of arrays f2 and
65	! p2 as automatic arrays in recursive subroutine next_mg_level
66	!
67	! 1041 2012-11-06 02:36:29Z raasch
68	! a 2d virtual processor topology is used by default for all machines
69	!
70	! 1036 2012-10-22 13:43:42Z raasch
71	! code put under GPL (PALM 3.9)
72	!
73	! 1003 2012-09-14 14:35:53Z raasch
74	! subdomains must have identical size (grid matching = "match" removed)
75	!
76	! 1001 2012-09-13 14:08:46Z raasch
77	! all actions concerning upstream-spline-method removed
78	!
79	! 978 2012-08-09 08:28:32Z fricke
80	! dirichlet/neumann and neumann/dirichlet added
81	! nxlu and nysv are also calculated for inflow boundary
82	!
83	! 809 2012-01-30 13:32:58Z maronga
84	! Bugfix: replaced .AND. and .NOT. with && and ! in the preprocessor directives
85	!
86	! 807 2012-01-25 11:53:51Z maronga
87	! New cpp directive "__check" implemented which is used by check_namelist_files
88	!
89	! Revision 1.1 1997/07/24 11:15:09 raasch
90	! Initial revision
91	!
92	!
93	! Description:
94	! ------------
95	! Determination of the virtual processor topology (if not prescribed by the
96	! user)and computation of the grid point number and array bounds of the local
97	! domains.
98	!------------------------------------------------------------------------------!
99
100	USE control_parameters, &
101	ONLY: bc_lr, bc_ns, coupling_mode, coupling_topology, dt_dosp, &
102	gathered_size, grid_level, grid_level_count, host, inflow_l, &
103	inflow_n, inflow_r, inflow_s, io_blocks, io_group, &
104	maximum_grid_level, maximum_parallel_io_streams, message_string,&
105	mg_switch_to_pe0_level, momentum_advec, psolver, outflow_l, &
106	outflow_n, outflow_r, outflow_s, recycling_width, scalar_advec, &
107	subdomain_size
108
109	USE grid_variables, &
110	ONLY: dx
111
112	USE indices, &
113	ONLY: mg_loc_ind, nbgp, nnx, nny, nnz, nx, nx_a, nx_o, nxl, nxl_mg, &
114	nxlu, nxr, nxr_mg, ny, ny_a, ny_o, nyn, nyn_mg, nys, nys_mg, &
115	nysv, nz, nzb, nzt, nzt_mg, wall_flags_1, wall_flags_2, &
116	wall_flags_3, wall_flags_4, wall_flags_5, wall_flags_6, &
117	wall_flags_7, wall_flags_8, wall_flags_9, wall_flags_10
118
119	USE kinds
120
121	USE pegrid
122
123	USE transpose_indices, &
124	ONLY: nxl_y, nxl_yd, nxl_z, nxr_y, nxr_yd, nxr_z, nyn_x, nyn_z, nys_x,&
125	nys_z, nzb_x, nzb_y, nzb_yd, nzt_x, nzt_yd, nzt_y
126
127	IMPLICIT NONE
128
129	INTEGER(iwp) :: i !:
130	INTEGER(iwp) :: id_inflow_l !:
131	INTEGER(iwp) :: id_recycling_l !:
132	INTEGER(iwp) :: ind(5) !:
133	INTEGER(iwp) :: j !:
134	INTEGER(iwp) :: k !:
135	INTEGER(iwp) :: maximum_grid_level_l !:
136	INTEGER(iwp) :: mg_levels_x !:
137	INTEGER(iwp) :: mg_levels_y !:
138	INTEGER(iwp) :: mg_levels_z !:
139	INTEGER(iwp) :: mg_switch_to_pe0_level_l !:
140	INTEGER(iwp) :: nnx_y !:
141	INTEGER(iwp) :: nnx_z !:
142	INTEGER(iwp) :: nny_x !:
143	INTEGER(iwp) :: nny_z !:
144	INTEGER(iwp) :: nnz_x !:
145	INTEGER(iwp) :: nnz_y !:
146	INTEGER(iwp) :: numproc_sqr !:
147	INTEGER(iwp) :: nxl_l !:
148	INTEGER(iwp) :: nxr_l !:
149	INTEGER(iwp) :: nyn_l !:
150	INTEGER(iwp) :: nys_l !:
151	INTEGER(iwp) :: nzb_l !:
152	INTEGER(iwp) :: nzt_l !:
153	INTEGER(iwp) :: omp_get_num_threads !:
154
155	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ind_all !:
156	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nxlf !:
157	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nxrf !:
158	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nynf !:
159	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nysf !:
160
161	INTEGER(iwp), DIMENSION(2) :: pdims_remote !:
162
163	#if defined( __mpi2 )
164	LOGICAL :: found !:
165	#endif
166
167	!
168	!-- Get the number of OpenMP threads
169	!$OMP PARALLEL
170	#if defined( __intel_openmp_bug )
171	threads_per_task = omp_get_num_threads()
172	#else
173	!$ threads_per_task = omp_get_num_threads()
174	#endif
175	!$OMP END PARALLEL
176
177
178	#if defined( __parallel )
179
180	CALL location_message( 'creating virtual PE grids + MPI derived data types', &
181	.FALSE. )
182	!
183	!-- Determine the processor topology or check it, if prescribed by the user
184	IF ( npex == -1 .AND. npey == -1 ) THEN
185
186	!
187	!-- Automatic determination of the topology
188	numproc_sqr = SQRT( REAL( numprocs, KIND=wp ) )
189	pdims(1) = MAX( numproc_sqr , 1 )
190	DO WHILE ( MOD( numprocs , pdims(1) ) /= 0 )
191	pdims(1) = pdims(1) - 1
192	ENDDO
193	pdims(2) = numprocs / pdims(1)
194
195	ELSEIF ( npex /= -1 .AND. npey /= -1 ) THEN
196
197	!
198	!-- Prescribed by user. Number of processors on the prescribed topology
199	!-- must be equal to the number of PEs available to the job
200	IF ( ( npex * npey ) /= numprocs ) THEN
201	WRITE( message_string, * ) 'number of PEs of the prescribed ', &
202	'topology (', npex*npey,') does not match & the number of ', &
203	'PEs available to the job (', numprocs, ')'
204	CALL message( 'init_pegrid', 'PA0221', 1, 2, 0, 6, 0 )
205	ENDIF
206	pdims(1) = npex
207	pdims(2) = npey
208
209	ELSE
210	!
211	!-- If the processor topology is prescribed by the user, the number of
212	!-- PEs must be given in both directions
213	message_string = 'if the processor topology is prescribed by the, ' // &
214	' user& both values of "npex" and "npey" must be given ' // &
215	'in the &NAMELIST-parameter file'
216	CALL message( 'init_pegrid', 'PA0222', 1, 2, 0, 6, 0 )
217
218	ENDIF
219
220	!
221	!-- For communication speedup, set barriers in front of collective
222	!-- communications by default on SGI-type systems
223	IF ( host(3:5) == 'sgi' ) collective_wait = .TRUE.
224
225	!
226	!-- If necessary, set horizontal boundary conditions to non-cyclic
227	IF ( bc_lr /= 'cyclic' ) cyclic(1) = .FALSE.
228	IF ( bc_ns /= 'cyclic' ) cyclic(2) = .FALSE.
229
230
231	#if ! defined( __check)
232	!
233	!-- Create the virtual processor grid
234	CALL MPI_CART_CREATE( comm_palm, ndim, pdims, cyclic, reorder, &
235	comm2d, ierr )
236	CALL MPI_COMM_RANK( comm2d, myid, ierr )
237	WRITE (myid_char,'(''_'',I4.4)') myid
238
239	CALL MPI_CART_COORDS( comm2d, myid, ndim, pcoord, ierr )
240	CALL MPI_CART_SHIFT( comm2d, 0, 1, pleft, pright, ierr )
241	CALL MPI_CART_SHIFT( comm2d, 1, 1, psouth, pnorth, ierr )
242
243	!
244	!-- Determine sub-topologies for transpositions
245	!-- Transposition from z to x:
246	remain_dims(1) = .TRUE.
247	remain_dims(2) = .FALSE.
248	CALL MPI_CART_SUB( comm2d, remain_dims, comm1dx, ierr )
249	CALL MPI_COMM_RANK( comm1dx, myidx, ierr )
250	!
251	!-- Transposition from x to y
252	remain_dims(1) = .FALSE.
253	remain_dims(2) = .TRUE.
254	CALL MPI_CART_SUB( comm2d, remain_dims, comm1dy, ierr )
255	CALL MPI_COMM_RANK( comm1dy, myidy, ierr )
256
257	#endif
258
259	!
260	!-- Calculate array bounds along x-direction for every PE.
261	ALLOCATE( nxlf(0:pdims(1)-1), nxrf(0:pdims(1)-1), nynf(0:pdims(2)-1), &
262	nysf(0:pdims(2)-1) )
263
264	IF ( MOD( nx+1 , pdims(1) ) /= 0 ) THEN
265	WRITE( message_string, * ) 'x-direction: gridpoint number (',nx+1,') ',&
266	'is not an& integral divisor of the number ', &
267	'processors (', pdims(1),')'
268	CALL message( 'init_pegrid', 'PA0225', 1, 2, 0, 6, 0 )
269	ELSE
270	nnx = ( nx + 1 ) / pdims(1)
271	IF ( nnx*pdims(1) - ( nx + 1) > nnx ) THEN
272	WRITE( message_string, * ) 'x-direction: nx does not match the', &
273	'requirements given by the number of PEs &used', &
274	'& please use nx = ', nx - ( pdims(1) - ( nnx*pdims(1) &
275	- ( nx + 1 ) ) ), ' instead of nx =', nx
276	CALL message( 'init_pegrid', 'PA0226', 1, 2, 0, 6, 0 )
277	ENDIF
278	ENDIF
279
280	!
281	!-- Left and right array bounds, number of gridpoints
282	DO i = 0, pdims(1)-1
283	nxlf(i) = i * nnx
284	nxrf(i) = ( i + 1 ) * nnx - 1
285	ENDDO
286
287	!
288	!-- Calculate array bounds in y-direction for every PE.
289	IF ( MOD( ny+1 , pdims(2) ) /= 0 ) THEN
290	WRITE( message_string, * ) 'y-direction: gridpoint number (',ny+1,') ', &
291	'is not an& integral divisor of the number of', &
292	'processors (', pdims(2),')'
293	CALL message( 'init_pegrid', 'PA0227', 1, 2, 0, 6, 0 )
294	ELSE
295	nny = ( ny + 1 ) / pdims(2)
296	IF ( nny*pdims(2) - ( ny + 1) > nny ) THEN
297	WRITE( message_string, * ) 'y-direction: ny does not match the', &
298	'requirements given by the number of PEs &used ', &
299	'& please use ny = ', ny - ( pdims(2) - ( nnx*pdims(2) &
300	- ( ny + 1 ) ) ), ' instead of ny =', ny
301	CALL message( 'init_pegrid', 'PA0228', 1, 2, 0, 6, 0 )
302	ENDIF
303	ENDIF
304
305	!
306	!-- South and north array bounds
307	DO j = 0, pdims(2)-1
308	nysf(j) = j * nny
309	nynf(j) = ( j + 1 ) * nny - 1
310	ENDDO
311
312	!
313	!-- Local array bounds of the respective PEs
314	nxl = nxlf(pcoord(1))
315	nxr = nxrf(pcoord(1))
316	nys = nysf(pcoord(2))
317	nyn = nynf(pcoord(2))
318	nzb = 0
319	nzt = nz
320	nnz = nz
321
322	!
323	!-- Set switches to define if the PE is situated at the border of the virtual
324	!-- processor grid
325	IF ( nxl == 0 ) left_border_pe = .TRUE.
326	IF ( nxr == nx ) right_border_pe = .TRUE.
327	IF ( nys == 0 ) south_border_pe = .TRUE.
328	IF ( nyn == ny ) north_border_pe = .TRUE.
329
330	!
331	!-- Calculate array bounds and gridpoint numbers for the transposed arrays
332	!-- (needed in the pressure solver)
333	!-- For the transposed arrays, cyclic boundaries as well as top and bottom
334	!-- boundaries are omitted, because they are obstructive to the transposition
335
336	!
337	!-- 1. transposition z --> x
338	!-- This transposition is not neccessary in case of a 1d-decomposition along x
339	nys_x = nys
340	nyn_x = nyn
341	nny_x = nny
342	nnz_x = nz / pdims(1)
343	nzb_x = 1 + myidx * nnz_x
344	nzt_x = ( myidx + 1 ) * nnz_x
345	sendrecvcount_zx = nnx * nny * nnz_x
346
347	IF ( pdims(2) /= 1 ) THEN
348	IF ( MOD( nz , pdims(1) ) /= 0 ) THEN
349	WRITE( message_string, * ) 'transposition z --> x:', &
350	'&nz=',nz,' is not an integral divisior of pdims(1)=', &
351	pdims(1)
352	CALL message( 'init_pegrid', 'PA0230', 1, 2, 0, 6, 0 )
353	ENDIF
354	ENDIF
355
356	!
357	!-- 2. transposition x --> y
358	nnz_y = nnz_x
359	nzb_y = nzb_x
360	nzt_y = nzt_x
361	IF ( MOD( nx+1 , pdims(2) ) /= 0 ) THEN
362	WRITE( message_string, * ) 'transposition x --> y:', &
363	'&nx+1=',nx+1,' is not an integral divisor of ',&
364	'pdims(2)=',pdims(2)
365	CALL message( 'init_pegrid', 'PA0231', 1, 2, 0, 6, 0 )
366	ENDIF
367	nnx_y = (nx+1) / pdims(2)
368	nxl_y = myidy * nnx_y
369	nxr_y = ( myidy + 1 ) * nnx_y - 1
370	sendrecvcount_xy = nnx_y * nny_x * nnz_y
371
372	!
373	!-- 3. transposition y --> z (ELSE: x --> y in case of 1D-decomposition
374	!-- along x)
375	nnx_z = nnx_y
376	nxl_z = nxl_y
377	nxr_z = nxr_y
378	nny_z = (ny+1) / pdims(1)
379	nys_z = myidx * nny_z
380	nyn_z = ( myidx + 1 ) * nny_z - 1
381	sendrecvcount_yz = nnx_y * nny_z * nnz_y
382
383	IF ( pdims(2) /= 1 ) THEN
384	!
385	!-- y --> z
386	!-- This transposition is not neccessary in case of a 1d-decomposition
387	!-- along x, except that the uptream-spline method is switched on
388	IF ( MOD( ny+1 , pdims(1) ) /= 0 ) THEN
389	WRITE( message_string, * ) 'transposition y --> z:', &
390	'& ny+1=',ny+1,' is not an integral divisor of ',&
391	'pdims(1)=',pdims(1)
392	CALL message( 'init_pegrid', 'PA0232', 1, 2, 0, 6, 0 )
393	ENDIF
394
395	ELSE
396	!
397	!-- x --> y. This condition must be fulfilled for a 1D-decomposition along x
398	IF ( MOD( ny+1 , pdims(1) ) /= 0 ) THEN
399	WRITE( message_string, * ) 'transposition x --> y:', &
400	'& ny+1=',ny+1,' is not an integral divisor of ',&
401	'pdims(1)=',pdims(1)
402	CALL message( 'init_pegrid', 'PA0233', 1, 2, 0, 6, 0 )
403	ENDIF
404
405	ENDIF
406
407	!
408	!-- Indices for direct transpositions z --> y (used for calculating spectra)
409	IF ( dt_dosp /= 9999999.9_wp ) THEN
410	IF ( MOD( nz, pdims(2) ) /= 0 ) THEN
411	WRITE( message_string, * ) 'direct transposition z --> y (needed ', &
412	'for spectra):& nz=',nz,' is not an integral divisor of ',&
413	'pdims(2)=',pdims(2)
414	CALL message( 'init_pegrid', 'PA0234', 1, 2, 0, 6, 0 )
415	ELSE
416	nxl_yd = nxl
417	nxr_yd = nxr
418	nzb_yd = 1 + myidy * ( nz / pdims(2) )
419	nzt_yd = ( myidy + 1 ) * ( nz / pdims(2) )
420	sendrecvcount_zyd = nnx * nny * ( nz / pdims(2) )
421	ENDIF
422	ENDIF
423
424	!
425	!-- Indices for direct transpositions y --> x (they are only possible in case
426	!-- of a 1d-decomposition along x)
427	IF ( pdims(2) == 1 ) THEN
428	nny_x = nny / pdims(1)
429	nys_x = myid * nny_x
430	nyn_x = ( myid + 1 ) * nny_x - 1
431	nzb_x = 1
432	nzt_x = nz
433	sendrecvcount_xy = nnx * nny_x * nz
434	ENDIF
435
436	!
437	!-- Indices for direct transpositions x --> y (they are only possible in case
438	!-- of a 1d-decomposition along y)
439	IF ( pdims(1) == 1 ) THEN
440	nnx_y = nnx / pdims(2)
441	nxl_y = myid * nnx_y
442	nxr_y = ( myid + 1 ) * nnx_y - 1
443	nzb_y = 1
444	nzt_y = nz
445	sendrecvcount_xy = nnx_y * nny * nz
446	ENDIF
447
448	!
449	!-- Arrays for storing the array bounds are needed any more
450	DEALLOCATE( nxlf , nxrf , nynf , nysf )
451
452
453	#if ! defined( __check)
454	!
455	!-- Collect index bounds from other PEs (to be written to restart file later)
456	ALLOCATE( hor_index_bounds(4,0:numprocs-1) )
457
458	IF ( myid == 0 ) THEN
459
460	hor_index_bounds(1,0) = nxl
461	hor_index_bounds(2,0) = nxr
462	hor_index_bounds(3,0) = nys
463	hor_index_bounds(4,0) = nyn
464
465	!
466	!-- Receive data from all other PEs
467	DO i = 1, numprocs-1
468	CALL MPI_RECV( ibuf, 4, MPI_INTEGER, i, MPI_ANY_TAG, comm2d, status, &
469	ierr )
470	hor_index_bounds(:,i) = ibuf(1:4)
471	ENDDO
472
473	ELSE
474	!
475	!-- Send index bounds to PE0
476	ibuf(1) = nxl
477	ibuf(2) = nxr
478	ibuf(3) = nys
479	ibuf(4) = nyn
480	CALL MPI_SEND( ibuf, 4, MPI_INTEGER, 0, myid, comm2d, ierr )
481
482	ENDIF
483
484	#endif
485
486	#if defined( __print )
487	!
488	!-- Control output
489	IF ( myid == 0 ) THEN
490	PRINT, ' processor topology *'
491	PRINT*, ' '
492	PRINT*, 'myid pcoord left right south north idx idy nxl: nxr',&
493	&' nys: nyn'
494	PRINT*, '------------------------------------------------------------',&
495	&'-----------'
496	WRITE (*,1000) 0, pcoord(1), pcoord(2), pleft, pright, psouth, pnorth, &
497	myidx, myidy, nxl, nxr, nys, nyn
498	1000 FORMAT (I4,2X,'(',I3,',',I3,')',3X,I4,2X,I4,3X,I4,2X,I4,2X,I3,1X,I3, &
499	2(2X,I4,':',I4))
500
501	!
502	!-- Receive data from the other PEs
503	DO i = 1,numprocs-1
504	CALL MPI_RECV( ibuf, 12, MPI_INTEGER, i, MPI_ANY_TAG, comm2d, status, &
505	ierr )
506	WRITE (*,1000) i, ( ibuf(j) , j = 1,12 )
507	ENDDO
508	ELSE
509
510	!
511	!-- Send data to PE0
512	ibuf(1) = pcoord(1); ibuf(2) = pcoord(2); ibuf(3) = pleft
513	ibuf(4) = pright; ibuf(5) = psouth; ibuf(6) = pnorth; ibuf(7) = myidx
514	ibuf(8) = myidy; ibuf(9) = nxl; ibuf(10) = nxr; ibuf(11) = nys
515	ibuf(12) = nyn
516	CALL MPI_SEND( ibuf, 12, MPI_INTEGER, 0, myid, comm2d, ierr )
517	ENDIF
518	#endif
519
520	#if defined( __parallel ) && ! defined( __check)
521	#if defined( __mpi2 )
522	!
523	!-- In case of coupled runs, get the port name on PE0 of the atmosphere model
524	!-- and pass it to PE0 of the ocean model
525	IF ( myid == 0 ) THEN
526
527	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
528
529	CALL MPI_OPEN_PORT( MPI_INFO_NULL, port_name, ierr )
530
531	CALL MPI_PUBLISH_NAME( 'palm_coupler', MPI_INFO_NULL, port_name, &
532	ierr )
533
534	!
535	!-- Write a flag file for the ocean model and the other atmosphere
536	!-- processes.
537	!-- There seems to be a bug in MPICH2 which causes hanging processes
538	!-- in case that execution of LOOKUP_NAME is continued too early
539	!-- (i.e. before the port has been created)
540	OPEN( 90, FILE='COUPLING_PORT_OPENED', FORM='FORMATTED' )
541	WRITE ( 90, '(''TRUE'')' )
542	CLOSE ( 90 )
543
544	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
545
546	!
547	!-- Continue only if the atmosphere model has created the port.
548	!-- There seems to be a bug in MPICH2 which causes hanging processes
549	!-- in case that execution of LOOKUP_NAME is continued too early
550	!-- (i.e. before the port has been created)
551	INQUIRE( FILE='COUPLING_PORT_OPENED', EXIST=found )
552	DO WHILE ( .NOT. found )
553	INQUIRE( FILE='COUPLING_PORT_OPENED', EXIST=found )
554	ENDDO
555
556	CALL MPI_LOOKUP_NAME( 'palm_coupler', MPI_INFO_NULL, port_name, ierr )
557
558	ENDIF
559
560	ENDIF
561
562	!
563	!-- In case of coupled runs, establish the connection between the atmosphere
564	!-- and the ocean model and define the intercommunicator (comm_inter)
565	CALL MPI_BARRIER( comm2d, ierr )
566	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
567
568	CALL MPI_COMM_ACCEPT( port_name, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &
569	comm_inter, ierr )
570	coupling_mode_remote = 'ocean_to_atmosphere'
571
572	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
573
574	CALL MPI_COMM_CONNECT( port_name, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &
575	comm_inter, ierr )
576	coupling_mode_remote = 'atmosphere_to_ocean'
577
578	ENDIF
579	#endif
580
581	!
582	!-- Determine the number of ghost point layers
583	IF ( scalar_advec == 'ws-scheme' .OR. momentum_advec == 'ws-scheme' ) THEN
584	nbgp = 3
585	ELSE
586	nbgp = 1
587	ENDIF
588
589	!
590	!-- Create a new MPI derived datatype for the exchange of surface (xy) data,
591	!-- which is needed for coupled atmosphere-ocean runs.
592	!-- First, calculate number of grid points of an xy-plane.
593	ngp_xy = ( nxr - nxl + 1 + 2 * nbgp ) * ( nyn - nys + 1 + 2 * nbgp )
594	CALL MPI_TYPE_VECTOR( ngp_xy, 1, nzt-nzb+2, MPI_REAL, type_xy, ierr )
595	CALL MPI_TYPE_COMMIT( type_xy, ierr )
596
597	IF ( TRIM( coupling_mode ) /= 'uncoupled' ) THEN
598
599	!
600	!-- Pass the number of grid points of the atmosphere model to
601	!-- the ocean model and vice versa
602	IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN
603
604	nx_a = nx
605	ny_a = ny
606
607	IF ( myid == 0 ) THEN
608
609	CALL MPI_SEND( nx_a, 1, MPI_INTEGER, numprocs, 1, comm_inter, &
610	ierr )
611	CALL MPI_SEND( ny_a, 1, MPI_INTEGER, numprocs, 2, comm_inter, &
612	ierr )
613	CALL MPI_SEND( pdims, 2, MPI_INTEGER, numprocs, 3, comm_inter, &
614	ierr )
615	CALL MPI_RECV( nx_o, 1, MPI_INTEGER, numprocs, 4, comm_inter, &
616	status, ierr )
617	CALL MPI_RECV( ny_o, 1, MPI_INTEGER, numprocs, 5, comm_inter, &
618	status, ierr )
619	CALL MPI_RECV( pdims_remote, 2, MPI_INTEGER, numprocs, 6, &
620	comm_inter, status, ierr )
621	ENDIF
622
623	CALL MPI_BCAST( nx_o, 1, MPI_INTEGER, 0, comm2d, ierr )
624	CALL MPI_BCAST( ny_o, 1, MPI_INTEGER, 0, comm2d, ierr )
625	CALL MPI_BCAST( pdims_remote, 2, MPI_INTEGER, 0, comm2d, ierr )
626
627	ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
628
629	nx_o = nx
630	ny_o = ny
631
632	IF ( myid == 0 ) THEN
633
634	CALL MPI_RECV( nx_a, 1, MPI_INTEGER, 0, 1, comm_inter, status, &
635	ierr )
636	CALL MPI_RECV( ny_a, 1, MPI_INTEGER, 0, 2, comm_inter, status, &
637	ierr )
638	CALL MPI_RECV( pdims_remote, 2, MPI_INTEGER, 0, 3, comm_inter, &
639	status, ierr )
640	CALL MPI_SEND( nx_o, 1, MPI_INTEGER, 0, 4, comm_inter, ierr )
641	CALL MPI_SEND( ny_o, 1, MPI_INTEGER, 0, 5, comm_inter, ierr )
642	CALL MPI_SEND( pdims, 2, MPI_INTEGER, 0, 6, comm_inter, ierr )
643	ENDIF
644
645	CALL MPI_BCAST( nx_a, 1, MPI_INTEGER, 0, comm2d, ierr)
646	CALL MPI_BCAST( ny_a, 1, MPI_INTEGER, 0, comm2d, ierr)
647	CALL MPI_BCAST( pdims_remote, 2, MPI_INTEGER, 0, comm2d, ierr)
648
649	ENDIF
650
651	ngp_a = ( nx_a+1 + 2 * nbgp ) * ( ny_a+1 + 2 * nbgp )
652	ngp_o = ( nx_o+1 + 2 * nbgp ) * ( ny_o+1 + 2 * nbgp )
653
654	!
655	!-- Determine if the horizontal grid and the number of PEs in ocean and
656	!-- atmosphere is same or not
657	IF ( nx_o == nx_a .AND. ny_o == ny_a .AND. &
658	pdims(1) == pdims_remote(1) .AND. pdims(2) == pdims_remote(2) ) &
659	THEN
660	coupling_topology = 0
661	ELSE
662	coupling_topology = 1
663	ENDIF
664
665	!
666	!-- Determine the target PEs for the exchange between ocean and
667	!-- atmosphere (comm2d)
668	IF ( coupling_topology == 0 ) THEN
669	!
670	!-- In case of identical topologies, every atmosphere PE has exactly one
671	!-- ocean PE counterpart and vice versa
672	IF ( TRIM( coupling_mode ) == 'atmosphere_to_ocean' ) THEN
673	target_id = myid + numprocs
674	ELSE
675	target_id = myid
676	ENDIF
677
678	ELSE
679	!
680	!-- In case of nonequivalent topology in ocean and atmosphere only for
681	!-- PE0 in ocean and PE0 in atmosphere a target_id is needed, since
682	!-- data echxchange between ocean and atmosphere will be done only
683	!-- between these PEs.
684	IF ( myid == 0 ) THEN
685
686	IF ( TRIM( coupling_mode ) == 'atmosphere_to_ocean' ) THEN
687	target_id = numprocs
688	ELSE
689	target_id = 0
690	ENDIF
691
692	ENDIF
693
694	ENDIF
695
696	ENDIF
697
698
699	#endif
700
701	#else
702
703	!
704	!-- Array bounds when running on a single PE (respectively a non-parallel
705	!-- machine)
706	nxl = 0
707	nxr = nx
708	nnx = nxr - nxl + 1
709	nys = 0
710	nyn = ny
711	nny = nyn - nys + 1
712	nzb = 0
713	nzt = nz
714	nnz = nz
715
716	ALLOCATE( hor_index_bounds(4,0:0) )
717	hor_index_bounds(1,0) = nxl
718	hor_index_bounds(2,0) = nxr
719	hor_index_bounds(3,0) = nys
720	hor_index_bounds(4,0) = nyn
721
722	!
723	!-- Array bounds for the pressure solver (in the parallel code, these bounds
724	!-- are the ones for the transposed arrays)
725	nys_x = nys
726	nyn_x = nyn
727	nzb_x = nzb + 1
728	nzt_x = nzt
729
730	nxl_y = nxl
731	nxr_y = nxr
732	nzb_y = nzb + 1
733	nzt_y = nzt
734
735	nxl_z = nxl
736	nxr_z = nxr
737	nys_z = nys
738	nyn_z = nyn
739
740	#endif
741
742	!
743	!-- Calculate number of grid levels necessary for the multigrid poisson solver
744	!-- as well as the gridpoint indices on each level
745	IF ( psolver == 'multigrid' ) THEN
746
747	!
748	!-- First calculate number of possible grid levels for the subdomains
749	mg_levels_x = 1
750	mg_levels_y = 1
751	mg_levels_z = 1
752
753	i = nnx
754	DO WHILE ( MOD( i, 2 ) == 0 .AND. i /= 2 )
755	i = i / 2
756	mg_levels_x = mg_levels_x + 1
757	ENDDO
758
759	j = nny
760	DO WHILE ( MOD( j, 2 ) == 0 .AND. j /= 2 )
761	j = j / 2
762	mg_levels_y = mg_levels_y + 1
763	ENDDO
764
765	k = nz ! do not use nnz because it might be > nz due to transposition
766	! requirements
767	DO WHILE ( MOD( k, 2 ) == 0 .AND. k /= 2 )
768	k = k / 2
769	mg_levels_z = mg_levels_z + 1
770	ENDDO
771
772	maximum_grid_level = MIN( mg_levels_x, mg_levels_y, mg_levels_z )
773
774	!
775	!-- Find out, if the total domain allows more levels. These additional
776	!-- levels are identically processed on all PEs.
777	IF ( numprocs > 1 .AND. mg_switch_to_pe0_level /= -1 ) THEN
778
779	IF ( mg_levels_z > MIN( mg_levels_x, mg_levels_y ) ) THEN
780
781	mg_switch_to_pe0_level_l = maximum_grid_level
782
783	mg_levels_x = 1
784	mg_levels_y = 1
785
786	i = nx+1
787	DO WHILE ( MOD( i, 2 ) == 0 .AND. i /= 2 )
788	i = i / 2
789	mg_levels_x = mg_levels_x + 1
790	ENDDO
791
792	j = ny+1
793	DO WHILE ( MOD( j, 2 ) == 0 .AND. j /= 2 )
794	j = j / 2
795	mg_levels_y = mg_levels_y + 1
796	ENDDO
797
798	maximum_grid_level_l = MIN( mg_levels_x, mg_levels_y, mg_levels_z )
799
800	IF ( maximum_grid_level_l > mg_switch_to_pe0_level_l ) THEN
801	mg_switch_to_pe0_level_l = maximum_grid_level_l - &
802	mg_switch_to_pe0_level_l + 1
803	ELSE
804	mg_switch_to_pe0_level_l = 0
805	ENDIF
806
807	ELSE
808	mg_switch_to_pe0_level_l = 0
809	maximum_grid_level_l = maximum_grid_level
810
811	ENDIF
812
813	!
814	!-- Use switch level calculated above only if it is not pre-defined
815	!-- by user
816	IF ( mg_switch_to_pe0_level == 0 ) THEN
817	IF ( mg_switch_to_pe0_level_l /= 0 ) THEN
818	mg_switch_to_pe0_level = mg_switch_to_pe0_level_l
819	maximum_grid_level = maximum_grid_level_l
820	ENDIF
821
822	ELSE
823	!
824	!-- Check pre-defined value and reset to default, if neccessary
825	IF ( mg_switch_to_pe0_level < mg_switch_to_pe0_level_l .OR. &
826	mg_switch_to_pe0_level >= maximum_grid_level_l ) THEN
827	message_string = 'mg_switch_to_pe0_level ' // &
828	'out of range and reset to default (=0)'
829	CALL message( 'init_pegrid', 'PA0235', 0, 1, 0, 6, 0 )
830	mg_switch_to_pe0_level = 0
831	ELSE
832	!
833	!-- Use the largest number of possible levels anyway and recalculate
834	!-- the switch level to this largest number of possible values
835	maximum_grid_level = maximum_grid_level_l
836
837	ENDIF
838
839	ENDIF
840
841	ENDIF
842
843	ALLOCATE( grid_level_count(maximum_grid_level), &
844	nxl_mg(0:maximum_grid_level), nxr_mg(0:maximum_grid_level), &
845	nyn_mg(0:maximum_grid_level), nys_mg(0:maximum_grid_level), &
846	nzt_mg(0:maximum_grid_level) )
847
848	grid_level_count = 0
849	!
850	!-- Index zero required as dummy due to definition of arrays f2 and p2 in
851	!-- recursive subroutine next_mg_level
852	nxl_mg(0) = 0; nxr_mg(0) = 0; nyn_mg(0) = 0; nys_mg(0) = 0; nzt_mg(0) = 0
853
854	nxl_l = nxl; nxr_l = nxr; nys_l = nys; nyn_l = nyn; nzt_l = nzt
855
856	DO i = maximum_grid_level, 1 , -1
857
858	IF ( i == mg_switch_to_pe0_level ) THEN
859	#if defined( __parallel ) && ! defined( __check )
860	!
861	!-- Save the grid size of the subdomain at the switch level, because
862	!-- it is needed in poismg.
863	ind(1) = nxl_l; ind(2) = nxr_l
864	ind(3) = nys_l; ind(4) = nyn_l
865	ind(5) = nzt_l
866	ALLOCATE( ind_all(5*numprocs), mg_loc_ind(5,0:numprocs-1) )
867	CALL MPI_ALLGATHER( ind, 5, MPI_INTEGER, ind_all, 5, &
868	MPI_INTEGER, comm2d, ierr )
869	DO j = 0, numprocs-1
870	DO k = 1, 5
871	mg_loc_ind(k,j) = ind_all(k+j*5)
872	ENDDO
873	ENDDO
874	DEALLOCATE( ind_all )
875	!
876	!-- Calculate the grid size of the total domain
877	nxr_l = ( nxr_l-nxl_l+1 ) * pdims(1) - 1
878	nxl_l = 0
879	nyn_l = ( nyn_l-nys_l+1 ) * pdims(2) - 1
880	nys_l = 0
881	!
882	!-- The size of this gathered array must not be larger than the
883	!-- array tend, which is used in the multigrid scheme as a temporary
884	!-- array. Therefore the subdomain size of an PE is calculated and
885	!-- the size of the gathered grid. These values are used in
886	!-- routines pres and poismg
887	subdomain_size = ( nxr - nxl + 2 * nbgp + 1 ) * &
888	( nyn - nys + 2 * nbgp + 1 ) * ( nzt - nzb + 2 )
889	gathered_size = ( nxr_l - nxl_l + 3 ) * ( nyn_l - nys_l + 3 ) * &
890	( nzt_l - nzb + 2 )
891
892	#elif ! defined ( __parallel )
893	message_string = 'multigrid gather/scatter impossible ' // &
894	'in non parallel mode'
895	CALL message( 'init_pegrid', 'PA0237', 1, 2, 0, 6, 0 )
896	#endif
897	ENDIF
898
899	nxl_mg(i) = nxl_l
900	nxr_mg(i) = nxr_l
901	nys_mg(i) = nys_l
902	nyn_mg(i) = nyn_l
903	nzt_mg(i) = nzt_l
904
905	nxl_l = nxl_l / 2
906	nxr_l = nxr_l / 2
907	nys_l = nys_l / 2
908	nyn_l = nyn_l / 2
909	nzt_l = nzt_l / 2
910
911	ENDDO
912
913	!
914	!-- Temporary problem: Currently calculation of maxerror iin routine poismg crashes
915	!-- if grid data are collected on PE0 already on the finest grid level.
916	!-- To be solved later.
917	IF ( maximum_grid_level == mg_switch_to_pe0_level ) THEN
918	message_string = 'grid coarsening on subdomain level cannot be performed'
919	CALL message( 'poismg', 'PA0236', 1, 2, 0, 6, 0 )
920	ENDIF
921
922	ELSE
923
924	maximum_grid_level = 0
925
926	ENDIF
927
928	!
929	!-- Default level 0 tells exchange_horiz that all ghost planes have to be
930	!-- exchanged. grid_level is adjusted in poismg, where only one ghost plane
931	!-- is required.
932	grid_level = 0
933
934	#if defined( __parallel ) && ! defined ( __check )
935	!
936	!-- Gridpoint number for the exchange of ghost points (y-line for 2D-arrays)
937	ngp_y = nyn - nys + 1 + 2 * nbgp
938
939	!
940	!-- Define new MPI derived datatypes for the exchange of ghost points in
941	!-- x- and y-direction for 2D-arrays (line)
942	CALL MPI_TYPE_VECTOR( nxr-nxl+1+2*nbgp, nbgp, ngp_y, MPI_REAL, type_x, &
943	ierr )
944	CALL MPI_TYPE_COMMIT( type_x, ierr )
945	CALL MPI_TYPE_VECTOR( nxr-nxl+1+2*nbgp, nbgp, ngp_y, MPI_INTEGER, &
946	type_x_int, ierr )
947	CALL MPI_TYPE_COMMIT( type_x_int, ierr )
948
949	CALL MPI_TYPE_VECTOR( nbgp, ngp_y, ngp_y, MPI_REAL, type_y, ierr )
950	CALL MPI_TYPE_COMMIT( type_y, ierr )
951	CALL MPI_TYPE_VECTOR( nbgp, ngp_y, ngp_y, MPI_INTEGER, type_y_int, ierr )
952	CALL MPI_TYPE_COMMIT( type_y_int, ierr )
953
954
955	!
956	!-- Calculate gridpoint numbers for the exchange of ghost points along x
957	!-- (yz-plane for 3D-arrays) and define MPI derived data type(s) for the
958	!-- exchange of ghost points in y-direction (xz-plane).
959	!-- Do these calculations for the model grid and (if necessary) also
960	!-- for the coarser grid levels used in the multigrid method
961	ALLOCATE ( ngp_yz(0:maximum_grid_level), type_xz(0:maximum_grid_level),&
962	type_yz(0:maximum_grid_level) )
963
964	nxl_l = nxl; nxr_l = nxr; nys_l = nys; nyn_l = nyn; nzb_l = nzb; nzt_l = nzt
965
966	!
967	!-- Discern between the model grid, which needs nbgp ghost points and
968	!-- grid levels for the multigrid scheme. In the latter case only one
969	!-- ghost point is necessary.
970	!-- First definition of MPI-datatypes for exchange of ghost layers on normal
971	!-- grid. The following loop is needed for data exchange in poismg.f90.
972	!
973	!-- Determine number of grid points of yz-layer for exchange
974	ngp_yz(0) = (nzt - nzb + 2) * (nyn - nys + 1 + 2 * nbgp)
975
976	!
977	!-- Define an MPI-datatype for the exchange of left/right boundaries.
978	!-- Although data are contiguous in physical memory (which does not
979	!-- necessarily require an MPI-derived datatype), the data exchange between
980	!-- left and right PE's using the MPI-derived type is 10% faster than without.
981	CALL MPI_TYPE_VECTOR( nxr-nxl+1+2nbgp, nbgp(nzt-nzb+2), ngp_yz(0), &
982	MPI_REAL, type_xz(0), ierr )
983	CALL MPI_TYPE_COMMIT( type_xz(0), ierr )
984
985	CALL MPI_TYPE_VECTOR( nbgp, ngp_yz(0), ngp_yz(0), MPI_REAL, type_yz(0), &
986	ierr )
987	CALL MPI_TYPE_COMMIT( type_yz(0), ierr )
988
989	!
990	!-- Definition of MPI-datatypes for multigrid method (coarser level grids)
991	IF ( psolver == 'multigrid' ) THEN
992	!
993	!-- Definition of MPI-datatyoe as above, but only 1 ghost level is used
994	DO i = maximum_grid_level, 1 , -1
995
996	ngp_yz(i) = (nzt_l - nzb_l + 2) * (nyn_l - nys_l + 3)
997
998	CALL MPI_TYPE_VECTOR( nxr_l-nxl_l+3, nzt_l-nzb_l+2, ngp_yz(i), &
999	MPI_REAL, type_xz(i), ierr )
1000	CALL MPI_TYPE_COMMIT( type_xz(i), ierr )
1001
1002	CALL MPI_TYPE_VECTOR( 1, ngp_yz(i), ngp_yz(i), MPI_REAL, type_yz(i), &
1003	ierr )
1004	CALL MPI_TYPE_COMMIT( type_yz(i), ierr )
1005
1006	nxl_l = nxl_l / 2
1007	nxr_l = nxr_l / 2
1008	nys_l = nys_l / 2
1009	nyn_l = nyn_l / 2
1010	nzt_l = nzt_l / 2
1011
1012	ENDDO
1013
1014	ENDIF
1015	#endif
1016
1017	#if defined( __parallel ) && ! defined ( __check )
1018	!
1019	!-- Setting of flags for inflow/outflow conditions in case of non-cyclic
1020	!-- horizontal boundary conditions.
1021	IF ( pleft == MPI_PROC_NULL ) THEN
1022	IF ( bc_lr == 'dirichlet/radiation' ) THEN
1023	inflow_l = .TRUE.
1024	ELSEIF ( bc_lr == 'radiation/dirichlet' ) THEN
1025	outflow_l = .TRUE.
1026	ENDIF
1027	ENDIF
1028
1029	IF ( pright == MPI_PROC_NULL ) THEN
1030	IF ( bc_lr == 'dirichlet/radiation' ) THEN
1031	outflow_r = .TRUE.
1032	ELSEIF ( bc_lr == 'radiation/dirichlet' ) THEN
1033	inflow_r = .TRUE.
1034	ENDIF
1035	ENDIF
1036
1037	IF ( psouth == MPI_PROC_NULL ) THEN
1038	IF ( bc_ns == 'dirichlet/radiation' ) THEN
1039	outflow_s = .TRUE.
1040	ELSEIF ( bc_ns == 'radiation/dirichlet' ) THEN
1041	inflow_s = .TRUE.
1042	ENDIF
1043	ENDIF
1044
1045	IF ( pnorth == MPI_PROC_NULL ) THEN
1046	IF ( bc_ns == 'dirichlet/radiation' ) THEN
1047	inflow_n = .TRUE.
1048	ELSEIF ( bc_ns == 'radiation/dirichlet' ) THEN
1049	outflow_n = .TRUE.
1050	ENDIF
1051	ENDIF
1052
1053	!
1054	!-- Broadcast the id of the inflow PE
1055	IF ( inflow_l ) THEN
1056	id_inflow_l = myidx
1057	ELSE
1058	id_inflow_l = 0
1059	ENDIF
1060	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1061	CALL MPI_ALLREDUCE( id_inflow_l, id_inflow, 1, MPI_INTEGER, MPI_SUM, &
1062	comm1dx, ierr )
1063
1064	!
1065	!-- Broadcast the id of the recycling plane
1066	!-- WARNING: needs to be adjusted in case of inflows other than from left side!
1067	IF ( NINT( recycling_width / dx ) >= nxl .AND. &
1068	NINT( recycling_width / dx ) <= nxr ) THEN
1069	id_recycling_l = myidx
1070	ELSE
1071	id_recycling_l = 0
1072	ENDIF
1073	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1074	CALL MPI_ALLREDUCE( id_recycling_l, id_recycling, 1, MPI_INTEGER, MPI_SUM, &
1075	comm1dx, ierr )
1076
1077	CALL location_message( 'finished', .TRUE. )
1078
1079	#elif ! defined ( __parallel )
1080	IF ( bc_lr == 'dirichlet/radiation' ) THEN
1081	inflow_l = .TRUE.
1082	outflow_r = .TRUE.
1083	ELSEIF ( bc_lr == 'radiation/dirichlet' ) THEN
1084	outflow_l = .TRUE.
1085	inflow_r = .TRUE.
1086	ENDIF
1087
1088	IF ( bc_ns == 'dirichlet/radiation' ) THEN
1089	inflow_n = .TRUE.
1090	outflow_s = .TRUE.
1091	ELSEIF ( bc_ns == 'radiation/dirichlet' ) THEN
1092	outflow_n = .TRUE.
1093	inflow_s = .TRUE.
1094	ENDIF
1095	#endif
1096
1097	!
1098	!-- At the inflow or outflow, u or v, respectively, have to be calculated for
1099	!-- one more grid point.
1100	IF ( inflow_l .OR. outflow_l ) THEN
1101	nxlu = nxl + 1
1102	ELSE
1103	nxlu = nxl
1104	ENDIF
1105	IF ( inflow_s .OR. outflow_s ) THEN
1106	nysv = nys + 1
1107	ELSE
1108	nysv = nys
1109	ENDIF
1110
1111	!
1112	!-- Allocate wall flag arrays used in the multigrid solver
1113	IF ( psolver == 'multigrid' ) THEN
1114
1115	DO i = maximum_grid_level, 1, -1
1116
1117	SELECT CASE ( i )
1118
1119	CASE ( 1 )
1120	ALLOCATE( wall_flags_1(nzb:nzt_mg(i)+1, &
1121	nys_mg(i)-1:nyn_mg(i)+1, &
1122	nxl_mg(i)-1:nxr_mg(i)+1) )
1123
1124	CASE ( 2 )
1125	ALLOCATE( wall_flags_2(nzb:nzt_mg(i)+1, &
1126	nys_mg(i)-1:nyn_mg(i)+1, &
1127	nxl_mg(i)-1:nxr_mg(i)+1) )
1128
1129	CASE ( 3 )
1130	ALLOCATE( wall_flags_3(nzb:nzt_mg(i)+1, &
1131	nys_mg(i)-1:nyn_mg(i)+1, &
1132	nxl_mg(i)-1:nxr_mg(i)+1) )
1133
1134	CASE ( 4 )
1135	ALLOCATE( wall_flags_4(nzb:nzt_mg(i)+1, &
1136	nys_mg(i)-1:nyn_mg(i)+1, &
1137	nxl_mg(i)-1:nxr_mg(i)+1) )
1138
1139	CASE ( 5 )
1140	ALLOCATE( wall_flags_5(nzb:nzt_mg(i)+1, &
1141	nys_mg(i)-1:nyn_mg(i)+1, &
1142	nxl_mg(i)-1:nxr_mg(i)+1) )
1143
1144	CASE ( 6 )
1145	ALLOCATE( wall_flags_6(nzb:nzt_mg(i)+1, &
1146	nys_mg(i)-1:nyn_mg(i)+1, &
1147	nxl_mg(i)-1:nxr_mg(i)+1) )
1148
1149	CASE ( 7 )
1150	ALLOCATE( wall_flags_7(nzb:nzt_mg(i)+1, &
1151	nys_mg(i)-1:nyn_mg(i)+1, &
1152	nxl_mg(i)-1:nxr_mg(i)+1) )
1153
1154	CASE ( 8 )
1155	ALLOCATE( wall_flags_8(nzb:nzt_mg(i)+1, &
1156	nys_mg(i)-1:nyn_mg(i)+1, &
1157	nxl_mg(i)-1:nxr_mg(i)+1) )
1158
1159	CASE ( 9 )
1160	ALLOCATE( wall_flags_9(nzb:nzt_mg(i)+1, &
1161	nys_mg(i)-1:nyn_mg(i)+1, &
1162	nxl_mg(i)-1:nxr_mg(i)+1) )
1163
1164	CASE ( 10 )
1165	ALLOCATE( wall_flags_10(nzb:nzt_mg(i)+1, &
1166	nys_mg(i)-1:nyn_mg(i)+1, &
1167	nxl_mg(i)-1:nxr_mg(i)+1) )
1168
1169	CASE DEFAULT
1170	message_string = 'more than 10 multigrid levels'
1171	CALL message( 'init_pegrid', 'PA0238', 1, 2, 0, 6, 0 )
1172
1173	END SELECT
1174
1175	ENDDO
1176
1177	ENDIF
1178
1179	!
1180	!-- Calculate the number of groups into which parallel I/O is split.
1181	!-- The default for files which are opened by all PEs (or where each
1182	!-- PE opens his own independent file) is, that all PEs are doing input/output
1183	!-- in parallel at the same time. This might cause performance or even more
1184	!-- severe problems depending on the configuration of the underlying file
1185	!-- system.
1186	!-- First, set the default:
1187	IF ( maximum_parallel_io_streams == -1 .OR. &
1188	maximum_parallel_io_streams > numprocs ) THEN
1189	maximum_parallel_io_streams = numprocs
1190	ENDIF
1191
1192	!
1193	!-- Now calculate the number of io_blocks and the io_group to which the
1194	!-- respective PE belongs. I/O of the groups is done in serial, but in parallel
1195	!-- for all PEs belonging to the same group. A preliminary setting with myid
1196	!-- based on MPI_COMM_WORLD has been done in parin.
1197	io_blocks = numprocs / maximum_parallel_io_streams
1198	io_group = MOD( myid+1, io_blocks )
1199
1200
1201	END SUBROUTINE init_pegrid

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source: palm/trunk/SOURCE/init_pegrid.f90 @ 1402

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