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source: palm/trunk/SOURCE/pmc_child_mod.f90 @ 3779

Last change on this file since 3779 was 3761, checked in by raasch, 6 years ago
unused variables removed, OpenACC directives re-formatted, statements added to avoid compiler warnings
Property svn:keywords set to `Id`
File size: 29.4 KB

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1	MODULE pmc_child
2
3	!------------------------------------------------------------------------------!
4	! This file is part of the PALM model system.
5	!
6	! PALM is free software: you can redistribute it and/or modify it under the
7	! terms of the GNU General Public License as published by the Free Software
8	! Foundation, either version 3 of the License, or (at your option) any later
9	! version.
10	!
11	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
12	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
13	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
14	!
15	! You should have received a copy of the GNU General Public License along with
16	! PALM. If not, see <http://www.gnu.org/licenses/>.
17	!
18	! Copyright 1997-2019 Leibniz Universitaet Hannover
19	!------------------------------------------------------------------------------!
20	!
21	! Current revisions:
22	! ------------------
23	!
24	!
25	! Former revisions:
26	! -----------------
27	! $Id: pmc_child_mod.f90 3761 2019-02-25 15:31:42Z eckhard $
28	! statemnet added to avoid compiler warning
29	!
30	! 3655 2019-01-07 16:51:22Z knoop
31	! explicit kind settings
32	!
33	! 3241 2018-09-12 15:02:00Z raasch
34	! unused variables removed
35	!
36	! 2841 2018-02-27 15:02:57Z knoop
37	! Bugfix: wrong placement of include 'mpif.h' corrected
38	!
39	! 2809 2018-02-15 09:55:58Z schwenkel
40	! Bugfix for gfortran: Replace the function C_SIZEOF with STORAGE_SIZE
41	!
42	! 2801 2018-02-14 16:01:55Z thiele
43	! Introduce particle transfer in nested models.
44	!
45	! 2718 2018-01-02 08:49:38Z maronga
46	! Corrected "Former revisions" section
47	!
48	! 2696 2017-12-14 17:12:51Z kanani
49	! Change in file header (GPL part)
50	!
51	! 2599 2017-11-01 13:18:45Z hellstea
52	! Some cleanup and commenting improvements only.
53	!
54	! 2101 2017-01-05 16:42:31Z suehring
55	!
56	! 2000 2016-08-20 18:09:15Z knoop
57	! Forced header and separation lines into 80 columns
58	!
59	! 1897 2016-05-03 08:10:23Z raasch
60	! Module renamed. Code clean up. The words server/client changed to parent/child.
61	!
62	! 1896 2016-05-03 08:06:41Z raasch
63	! re-formatted to match PALM style
64	!
65	! 1850 2016-04-08 13:29:27Z maronga
66	! Module renamed
67	!
68	!
69	! 1833 2016-04-07 14:23:03Z raasch
70	! gfortran requires pointer attributes for some array declarations,
71	! long line wrapped
72	!
73	! 1808 2016-04-05 19:44:00Z raasch
74	! MPI module used by default on all machines
75	!
76	! 1797 2016-03-21 16:50:28Z raasch
77	! introduction of different datatransfer modes
78	!
79	! 1791 2016-03-11 10:41:25Z raasch
80	! Debug write-statement commented out
81	!
82	! 1786 2016-03-08 05:49:27Z raasch
83	! change in child-parent data transfer: parent now gets data from child
84	! instead of that child puts it to the parent
85	!
86	! 1783 2016-03-06 18:36:17Z raasch
87	! Bugfix: wrong data-type in MPI_WIN_CREATE replaced
88	!
89	! 1779 2016-03-03 08:01:28Z raasch
90	! kind=dp replaced by wp, dim_order removed
91	! array management changed from linked list to sequential loop
92	!
93	! 1764 2016-02-28 12:45:19Z raasch
94	! cpp-statement added (nesting can only be used in parallel mode),
95	! all kinds given in PALM style
96	!
97	! 1762 2016-02-25 12:31:13Z hellstea
98	! Initial revision by K. Ketelsen
99	!
100	! Description:
101	! ------------
102	!
103	! Child part of Palm Model Coupler
104	!------------------------------------------------------------------------------!
105
106	#if defined( __parallel )
107
108	USE, INTRINSIC :: iso_c_binding
109
110	#if !defined( __mpifh )
111	USE MPI
112	#endif
113
114	USE kinds
115
116	USE pmc_general, &
117	ONLY: arraydef, childdef, da_desclen, da_namedef, da_namelen, pedef, &
118	pmc_da_name_err, pmc_g_setname, pmc_max_array, pmc_status_ok
119
120	USE pmc_handle_communicator, &
121	ONLY: m_model_comm, m_model_npes, m_model_rank, m_to_parent_comm
122
123	USE pmc_mpi_wrapper, &
124	ONLY: pmc_alloc_mem, pmc_bcast, pmc_inter_bcast, pmc_time
125
126	IMPLICIT NONE
127
128	#if defined( __mpifh )
129	INCLUDE "mpif.h"
130	#endif
131
132	PRIVATE
133	SAVE
134
135	TYPE(childdef), PUBLIC :: me !<
136
137	INTEGER(iwp) :: myindex = 0 !< counter and unique number for data arrays
138	INTEGER(iwp) :: next_array_in_list = 0 !<
139
140
141	INTERFACE pmc_childinit
142	MODULE PROCEDURE pmc_childinit
143	END INTERFACE pmc_childinit
144
145	INTERFACE pmc_c_clear_next_array_list
146	MODULE PROCEDURE pmc_c_clear_next_array_list
147	END INTERFACE pmc_c_clear_next_array_list
148
149	INTERFACE pmc_c_getbuffer
150	MODULE PROCEDURE pmc_c_getbuffer
151	END INTERFACE pmc_c_getbuffer
152
153	INTERFACE pmc_c_getnextarray
154	MODULE PROCEDURE pmc_c_getnextarray
155	END INTERFACE pmc_c_getnextarray
156
157	INTERFACE pmc_c_get_2d_index_list
158	MODULE PROCEDURE pmc_c_get_2d_index_list
159	END INTERFACE pmc_c_get_2d_index_list
160
161	INTERFACE pmc_c_putbuffer
162	MODULE PROCEDURE pmc_c_putbuffer
163	END INTERFACE pmc_c_putbuffer
164
165	INTERFACE pmc_c_setind_and_allocmem
166	MODULE PROCEDURE pmc_c_setind_and_allocmem
167	END INTERFACE pmc_c_setind_and_allocmem
168
169	INTERFACE pmc_c_set_dataarray
170	MODULE PROCEDURE pmc_c_set_dataarray_2d
171	MODULE PROCEDURE pmc_c_set_dataarray_3d
172	MODULE PROCEDURE pmc_c_set_dataarray_ip2d
173	END INTERFACE pmc_c_set_dataarray
174
175	INTERFACE pmc_set_dataarray_name
176	MODULE PROCEDURE pmc_set_dataarray_name
177	MODULE PROCEDURE pmc_set_dataarray_name_lastentry
178	END INTERFACE pmc_set_dataarray_name
179
180
181	PUBLIC pmc_childinit, pmc_c_clear_next_array_list, pmc_c_getbuffer, &
182	pmc_c_getnextarray, pmc_c_putbuffer, pmc_c_setind_and_allocmem, &
183	pmc_c_set_dataarray, pmc_set_dataarray_name, pmc_c_get_2d_index_list
184
185	CONTAINS
186
187
188
189	SUBROUTINE pmc_childinit
190
191	IMPLICIT NONE
192
193	INTEGER(iwp) :: i !<
194	INTEGER(iwp) :: istat !<
195
196	!
197	!-- Get / define the MPI environment
198	me%model_comm = m_model_comm
199	me%inter_comm = m_to_parent_comm
200
201	CALL MPI_COMM_RANK( me%model_comm, me%model_rank, istat )
202	CALL MPI_COMM_SIZE( me%model_comm, me%model_npes, istat )
203	CALL MPI_COMM_REMOTE_SIZE( me%inter_comm, me%inter_npes, istat )
204	!
205	!-- Intra-communicator is used for MPI_GET
206	CALL MPI_INTERCOMM_MERGE( me%inter_comm, .TRUE., me%intra_comm, istat )
207	CALL MPI_COMM_RANK( me%intra_comm, me%intra_rank, istat )
208
209	ALLOCATE( me%pes(me%inter_npes) )
210	!
211	!-- Allocate an array of type arraydef for all parent processes to store
212	!-- information of then transfer array
213	DO i = 1, me%inter_npes
214	ALLOCATE( me%pes(i)%array_list(pmc_max_array) )
215	ENDDO
216
217	END SUBROUTINE pmc_childinit
218
219
220
221	SUBROUTINE pmc_set_dataarray_name( parentarraydesc, parentarrayname, &
222	childarraydesc, childarrayname, istat )
223
224	IMPLICIT NONE
225
226	CHARACTER(LEN=*), INTENT(IN) :: parentarrayname !<
227	CHARACTER(LEN=*), INTENT(IN) :: parentarraydesc !<
228	CHARACTER(LEN=*), INTENT(IN) :: childarrayname !<
229	CHARACTER(LEN=*), INTENT(IN) :: childarraydesc !<
230
231	INTEGER(iwp), INTENT(OUT) :: istat !<
232	!
233	!-- Local variables
234	TYPE(da_namedef) :: myname !<
235
236	INTEGER(iwp) :: mype !<
237
238
239	istat = pmc_status_ok
240	!
241	!-- Check length of array names
242	IF ( LEN( TRIM( parentarrayname) ) > da_namelen .OR. &
243	LEN( TRIM( childarrayname) ) > da_namelen ) THEN
244	istat = pmc_da_name_err
245	ENDIF
246
247	IF ( m_model_rank == 0 ) THEN
248	myindex = myindex + 1
249	myname%couple_index = myIndex
250	myname%parentdesc = TRIM( parentarraydesc )
251	myname%nameonparent = TRIM( parentarrayname )
252	myname%childdesc = TRIM( childarraydesc )
253	myname%nameonchild = TRIM( childarrayname )
254	ENDIF
255
256	!
257	!-- Broadcast to all child processes
258	!
259	!-- The complete description of an transfer names array is broadcasted
260
261	CALL pmc_bcast( myname%couple_index, 0, comm=m_model_comm )
262	CALL pmc_bcast( myname%parentdesc, 0, comm=m_model_comm )
263	CALL pmc_bcast( myname%nameonparent, 0, comm=m_model_comm )
264	CALL pmc_bcast( myname%childdesc, 0, comm=m_model_comm )
265	CALL pmc_bcast( myname%nameonchild, 0, comm=m_model_comm )
266	!
267	!-- Broadcast to all parent processes
268	!-- The complete description of an transfer array names is broadcasted als to all parent processe
269	! Only the root PE of the broadcasts to parent using intra communicator
270
271	IF ( m_model_rank == 0 ) THEN
272	mype = MPI_ROOT
273	ELSE
274	mype = MPI_PROC_NULL
275	ENDIF
276
277	CALL pmc_bcast( myname%couple_index, mype, comm=m_to_parent_comm )
278	CALL pmc_bcast( myname%parentdesc, mype, comm=m_to_parent_comm )
279	CALL pmc_bcast( myname%nameonparent, mype, comm=m_to_parent_comm )
280	CALL pmc_bcast( myname%childdesc, mype, comm=m_to_parent_comm )
281	CALL pmc_bcast( myname%nameonchild, mype, comm=m_to_parent_comm )
282
283	CALL pmc_g_setname( me, myname%couple_index, myname%nameonchild )
284
285	END SUBROUTINE pmc_set_dataarray_name
286
287
288
289	SUBROUTINE pmc_set_dataarray_name_lastentry( lastentry )
290
291	IMPLICIT NONE
292
293	LOGICAL, INTENT(IN), OPTIONAL :: lastentry !<
294	!
295	!-- Local variables
296	INTEGER :: idum !<
297	INTEGER :: mype !<
298	TYPE(dA_namedef) :: myname !<
299
300	myname%couple_index = -1
301
302	IF ( m_model_rank == 0 ) THEN
303	mype = MPI_ROOT
304	ELSE
305	mype = MPI_PROC_NULL
306	ENDIF
307
308	CALL pmc_bcast( myname%couple_index, mype, comm=m_to_parent_comm )
309
310	!
311	!-- Next statement is just to avoid compiler warnings about unused variables
312	IF ( PRESENT( lastentry ) ) idum = 1
313
314	END SUBROUTINE pmc_set_dataarray_name_lastentry
315
316
317
318	SUBROUTINE pmc_c_get_2d_index_list
319
320	IMPLICIT NONE
321
322	INTEGER(iwp) :: dummy !<
323	INTEGER(iwp) :: i, ierr, i2, j, nr !<
324	INTEGER(iwp) :: indwin !< MPI window object
325	INTEGER(iwp) :: indwin2 !< MPI window object
326
327	INTEGER(KIND=MPI_ADDRESS_KIND) :: win_size !< Size of MPI window 1 (in bytes)
328	INTEGER(KIND=MPI_ADDRESS_KIND) :: disp !< Displacement unit (Integer = 4, floating poit = 8
329	INTEGER(KIND=MPI_ADDRESS_KIND) :: winsize !< Size of MPI window 2 (in bytes)
330
331	INTEGER, DIMENSION(me%inter_npes*2) :: nrele !< Number of Elements of a
332	!< horizontal slice
333	INTEGER, DIMENSION(:), POINTER :: myind !<
334
335	TYPE(pedef), POINTER :: ape !> Pointer to pedef structure
336
337
338	win_size = STORAGE_SIZE( dummy )/8
339	CALL MPI_WIN_CREATE( dummy, win_size, iwp, MPI_INFO_NULL, me%intra_comm, &
340	indwin, ierr )
341	!
342	!-- Close window on child side and open on parent side
343	CALL MPI_WIN_FENCE( 0, indwin, ierr )
344
345	! Between the two MPI_WIN_FENCE calls, the parent can fill the RMA window
346
347	!-- Close window on parent side and open on child side
348
349	CALL MPI_WIN_FENCE( 0, indwin, ierr )
350
351	DO i = 1, me%inter_npes
352	disp = me%model_rank * 2
353	CALL MPI_GET( nrele((i-1)*2+1), 2, MPI_INTEGER, i-1, disp, 2, &
354	MPI_INTEGER, indwin, ierr )
355	ENDDO
356	!
357	!-- MPI_GET is non-blocking -> data in nrele is not available until MPI_FENCE is
358	!-- called
359	CALL MPI_WIN_FENCE( 0, indwin, ierr )
360	!
361	!-- Allocate memory for index array
362	winsize = 0
363	DO i = 1, me%inter_npes
364	ape => me%pes(i)
365	i2 = ( i-1 ) * 2 + 1
366	nr = nrele(i2+1)
367	IF ( nr > 0 ) THEN
368	ALLOCATE( ape%locind(nr) )
369	ELSE
370	NULLIFY( ape%locind )
371	ENDIF
372	winsize = MAX( INT( nr, MPI_ADDRESS_KIND ), winsize )
373	ENDDO
374
375	ALLOCATE( myind(2*winsize) )
376	winsize = 1
377	!
378	!-- Local buffer used in MPI_GET can but must not be inside the MPI Window.
379	!-- Here, we use a dummy for the MPI window because the parent processes do
380	!-- not access the RMA window via MPI_GET or MPI_PUT
381	CALL MPI_WIN_CREATE( dummy, winsize, iwp, MPI_INFO_NULL, me%intra_comm, &
382	indwin2, ierr )
383	!
384	!-- MPI_GET is non-blocking -> data in nrele is not available until MPI_FENCE is
385	!-- called
386
387	CALL MPI_WIN_FENCE( 0, indwin2, ierr )
388
389	! Between the two MPI_WIN_FENCE calls, the parent can fill the RMA window
390
391	CALL MPI_WIN_FENCE( 0, indwin2, ierr )
392
393	DO i = 1, me%inter_npes
394	ape => me%pes(i)
395	nr = nrele(i*2)
396	IF ( nr > 0 ) THEN
397	disp = nrele(2*(i-1)+1)
398	CALL MPI_WIN_LOCK( MPI_LOCK_SHARED , i-1, 0, indwin2, ierr )
399	CALL MPI_GET( myind, 2nr, MPI_INTEGER, i-1, disp, 2nr, &
400	MPI_INTEGER, indwin2, ierr )
401	CALL MPI_WIN_UNLOCK( i-1, indwin2, ierr )
402	DO j = 1, nr
403	ape%locind(j)%i = myind(2*j-1)
404	ape%locind(j)%j = myind(2*j)
405	ENDDO
406	ape%nrele = nr
407	ELSE
408	ape%nrele = -1
409	ENDIF
410	ENDDO
411	!
412	!-- Don't know why, but this barrier is necessary before we can free the windows
413	CALL MPI_BARRIER( me%intra_comm, ierr )
414
415	CALL MPI_WIN_FREE( indWin, ierr )
416	CALL MPI_WIN_FREE( indwin2, ierr )
417	DEALLOCATE( myind )
418
419	END SUBROUTINE pmc_c_get_2d_index_list
420
421
422
423	SUBROUTINE pmc_c_clear_next_array_list
424
425	IMPLICIT NONE
426
427	next_array_in_list = 0
428
429	END SUBROUTINE pmc_c_clear_next_array_list
430
431
432
433	LOGICAL FUNCTION pmc_c_getnextarray( myname )
434
435	!
436	!-- List handling is still required to get minimal interaction with
437	!-- pmc_interface
438	CHARACTER(LEN=*), INTENT(OUT) :: myname !<
439	!
440	!-- Local variables
441	TYPE(pedef), POINTER :: ape
442	TYPE(arraydef), POINTER :: ar
443
444
445	next_array_in_list = next_array_in_list + 1
446	!
447	!-- Array names are the same on all child PEs, so take first process to
448	!-- get the name
449	ape => me%pes(1)
450	!
451	!-- Check if all arrays have been processed
452	IF ( next_array_in_list > ape%nr_arrays ) THEN
453	pmc_c_getnextarray = .FALSE.
454	RETURN
455	ENDIF
456
457	ar => ape%array_list( next_array_in_list )
458
459	myname = ar%name
460	!
461	!-- Return true if annother array
462	!-- If all array have been processed, the RETURN statement a couple of lines above is active
463
464	pmc_c_getnextarray = .TRUE.
465
466	END FUNCTION pmc_c_getnextarray
467
468
469
470	SUBROUTINE pmc_c_set_dataarray_2d( array )
471
472	IMPLICIT NONE
473
474	REAL(wp), INTENT(IN) , DIMENSION(:,:), POINTER :: array !<
475
476	INTEGER(iwp) :: i !<
477	INTEGER(iwp) :: nrdims !<
478	INTEGER(iwp), DIMENSION(4) :: dims !<
479
480	TYPE(C_PTR) :: array_adr
481	TYPE(arraydef), POINTER :: ar
482	TYPE(pedef), POINTER :: ape
483
484
485	dims = 1
486	nrdims = 2
487	dims(1) = SIZE( array, 1 )
488	dims(2) = SIZE( array, 2 )
489
490	array_adr = C_LOC( array )
491
492	DO i = 1, me%inter_npes
493	ape => me%pes(i)
494	ar => ape%array_list(next_array_in_list)
495	ar%nrdims = nrdims
496	ar%dimkey = nrdims
497	ar%a_dim = dims
498	ar%data = array_adr
499	ENDDO
500
501	END SUBROUTINE pmc_c_set_dataarray_2d
502
503	SUBROUTINE pmc_c_set_dataarray_ip2d( array )
504
505	IMPLICIT NONE
506
507	INTEGER(idp), INTENT(IN) , DIMENSION(:,:), POINTER :: array !<
508
509	INTEGER(iwp) :: i !<
510	INTEGER(iwp) :: nrdims !<
511	INTEGER(iwp), DIMENSION(4) :: dims !<
512
513	TYPE(C_PTR) :: array_adr
514	TYPE(arraydef), POINTER :: ar
515	TYPE(pedef), POINTER :: ape
516
517	dims = 1
518	nrdims = 2
519	dims(1) = SIZE( array, 1 )
520	dims(2) = SIZE( array, 2 )
521
522	array_adr = C_LOC( array )
523
524	DO i = 1, me%inter_npes
525	ape => me%pes(i)
526	ar => ape%array_list(next_array_in_list)
527	ar%nrdims = nrdims
528	ar%dimkey = 22
529	ar%a_dim = dims
530	ar%data = array_adr
531	ENDDO
532
533	END SUBROUTINE pmc_c_set_dataarray_ip2d
534
535	SUBROUTINE pmc_c_set_dataarray_3d (array)
536
537	IMPLICIT NONE
538
539	REAL(wp), INTENT(IN), DIMENSION(:,:,:), POINTER :: array !<
540
541	INTEGER(iwp) :: i
542	INTEGER(iwp) :: nrdims
543	INTEGER(iwp), DIMENSION (4) :: dims
544
545	TYPE(C_PTR) :: array_adr
546	TYPE(pedef), POINTER :: ape
547	TYPE(arraydef), POINTER :: ar
548
549
550	dims = 1
551	nrdims = 3
552	dims(1) = SIZE( array, 1 )
553	dims(2) = SIZE( array, 2 )
554	dims(3) = SIZE( array, 3 )
555
556	array_adr = C_LOC( array )
557
558	DO i = 1, me%inter_npes
559	ape => me%pes(i)
560	ar => ape%array_list(next_array_in_list)
561	ar%nrdims = nrdims
562	ar%dimkey = nrdims
563	ar%a_dim = dims
564	ar%data = array_adr
565	ENDDO
566
567	END SUBROUTINE pmc_c_set_dataarray_3d
568
569
570
571	SUBROUTINE pmc_c_setind_and_allocmem
572
573	IMPLICIT NONE
574
575	!
576	!-- Naming convention for appendices: _pc -> parent to child transfer
577	!-- _cp -> child to parent transfer
578	!-- recv -> parent to child transfer
579	!-- send -> child to parent transfer
580	INTEGER(iwp) :: arlen !<
581	INTEGER(iwp) :: myindex !<
582	INTEGER(iwp) :: i !<
583	INTEGER(iwp) :: ierr !<
584	INTEGER(iwp) :: istat !<
585	INTEGER(iwp) :: j !<
586	INTEGER(iwp) :: rcount !<
587	INTEGER(iwp) :: tag !<
588
589	INTEGER(iwp), PARAMETER :: noindex = -1 !<
590
591	INTEGER(idp) :: bufsize !< size of MPI data window
592	INTEGER(KIND=MPI_ADDRESS_KIND) :: winsize !<
593
594	INTEGER(iwp),DIMENSION(1024) :: req !<
595
596	REAL(wp), DIMENSION(:), POINTER, SAVE :: base_array_pc !< base array
597	REAL(wp), DIMENSION(:), POINTER, SAVE :: base_array_cp !< base array
598
599	TYPE(pedef), POINTER :: ape !<
600	TYPE(arraydef), POINTER :: ar !<
601	Type(C_PTR) :: base_ptr !<
602
603
604	myindex = 0
605	bufsize = 8
606	!
607	!-- Parent to child direction.
608	!-- First stride: compute size and set index
609	DO i = 1, me%inter_npes
610	ape => me%pes(i)
611	tag = 200
612	DO j = 1, ape%nr_arrays
613	ar => ape%array_list(j)
614	!
615	!-- Receive index from child
616	tag = tag + 1
617	CALL MPI_RECV( myindex, 1, MPI_INTEGER, i-1, tag, me%inter_comm, &
618	MPI_STATUS_IGNORE, ierr )
619	ar%recvindex = myindex
620	!
621	!-- Determine max, because child buffer is allocated only once
622	!-- All 2D and 3d arrays use the same buffer
623
624	IF ( ar%nrdims == 3 ) THEN
625	bufsize = MAX( bufsize, &
626	INT( ar%a_dim(1)ar%a_dim(2)ar%a_dim(3), &
627	MPI_ADDRESS_KIND ) )
628	ELSE
629	bufsize = MAX( bufsize, &
630	INT( ar%a_dim(1)*ar%a_dim(2), MPI_ADDRESS_KIND ) )
631	ENDIF
632	ENDDO
633	ENDDO
634	!
635	!-- Create RMA (one sided communication) data buffer.
636	!-- The buffer for MPI_GET can be PE local, i.e. it can but must not be part of
637	!-- the MPI RMA window
638	CALL pmc_alloc_mem( base_array_pc, bufsize, base_ptr )
639	me%totalbuffersize = bufsize*wp ! total buffer size in byte
640	!
641	!-- Second stride: set buffer pointer
642	DO i = 1, me%inter_npes
643	ape => me%pes(i)
644	DO j = 1, ape%nr_arrays
645	ar => ape%array_list(j)
646	ar%recvbuf = base_ptr
647	ENDDO
648	ENDDO
649	!
650	!-- Child to parent direction
651	myindex = 1
652	rcount = 0
653	bufsize = 8
654
655	DO i = 1, me%inter_npes
656	ape => me%pes(i)
657	tag = 300
658	DO j = 1, ape%nr_arrays
659	ar => ape%array_list(j)
660	IF ( ar%nrdims == 2 ) THEN
661	arlen = ape%nrele
662	ELSEIF( ar%nrdims == 3 ) THEN
663	arlen = ape%nrele*ar%a_dim(1)
664	ENDIF
665	tag = tag + 1
666	rcount = rcount + 1
667	IF ( ape%nrele > 0 ) THEN
668	CALL MPI_ISEND( myindex, 1, MPI_INTEGER, i-1, tag, me%inter_comm, &
669	req(rcount), ierr )
670	ar%sendindex = myindex
671	ELSE
672	CALL MPI_ISEND( noindex, 1, MPI_INTEGER, i-1, tag, me%inter_comm, &
673	req(rcount), ierr )
674	ar%sendindex = noindex
675	ENDIF
676	!
677	!-- Maximum of 1024 pending requests
678	! 1024 is an arbitrary value just to make sure the number of pending
679	! requests is getting too large. It is possible that this value has to
680	! be adjusted in case of running the model on large number of cores.
681
682	IF ( rcount == 1024 ) THEN
683	CALL MPI_WAITALL( rcount, req, MPI_STATUSES_IGNORE, ierr )
684	rcount = 0
685	ENDIF
686
687	IF ( ape%nrele > 0 ) THEN
688	ar%sendsize = arlen
689	myindex = myindex + arlen
690	bufsize = bufsize + arlen
691	ENDIF
692
693	ENDDO
694
695	IF ( rcount > 0 ) THEN
696	CALL MPI_WAITALL( rcount, req, MPI_STATUSES_IGNORE, ierr )
697	ENDIF
698
699	ENDDO
700	!
701	!-- Create RMA (one sided communication) window for data buffer child to parent
702	!-- transfer.
703	!-- The buffer of MPI_GET (counter part of transfer) can be PE-local, i.e. it
704	!-- can but must not be part of the MPI RMA window. Only one RMA window is
705	!-- required to prepare the data
706	!-- for parent -> child transfer on the parent side
707	!-- and
708	!-- for child -> parent transfer on the child side
709	CALL pmc_alloc_mem( base_array_cp, bufsize )
710	me%totalbuffersize = bufsize * wp ! total buffer size in byte
711
712	winSize = me%totalbuffersize
713
714	CALL MPI_WIN_CREATE( base_array_cp, winsize, wp, MPI_INFO_NULL, &
715	me%intra_comm, me%win_parent_child, ierr )
716	CALL MPI_WIN_FENCE( 0, me%win_parent_child, ierr )
717	CALL MPI_BARRIER( me%intra_comm, ierr )
718	!
719	!-- Second stride: set buffer pointer
720	DO i = 1, me%inter_npes
721	ape => me%pes(i)
722	DO j = 1, ape%nr_arrays
723	ar => ape%array_list(j)
724	IF ( ape%nrele > 0 ) THEN
725	ar%sendbuf = C_LOC( base_array_cp(ar%sendindex) )
726	!
727	!-- TODO: if this is an error to be really expected, replace the
728	!-- following message by a meaningful standard PALM message using
729	!-- the message-routine
730	IF ( ar%sendindex+ar%sendsize > bufsize ) THEN
731	WRITE( 0,'(a,i4,4i7,1x,a)') 'Child buffer too small ', i, &
732	ar%sendindex, ar%sendsize, ar%sendindex+ar%sendsize, &
733	bufsize, TRIM( ar%name )
734	CALL MPI_ABORT( MPI_COMM_WORLD, istat, ierr )
735	ENDIF
736	ENDIF
737	ENDDO
738	ENDDO
739
740	END SUBROUTINE pmc_c_setind_and_allocmem
741
742
743
744	SUBROUTINE pmc_c_getbuffer( waittime, particle_transfer )
745
746	IMPLICIT NONE
747
748	REAL(wp), INTENT(OUT), OPTIONAL :: waittime !<
749	LOGICAL, INTENT(IN), OPTIONAL :: particle_transfer !<
750
751	LOGICAL :: lo_ptrans!<
752
753	INTEGER(iwp) :: ierr !<
754	INTEGER(iwp) :: ij !<
755	INTEGER(iwp) :: ip !<
756	INTEGER(iwp) :: j !<
757	INTEGER(iwp) :: myindex !<
758	INTEGER(iwp) :: nr !< number of elements to get
759	!< from parent
760	INTEGER(KIND=MPI_ADDRESS_KIND) :: target_disp
761	INTEGER,DIMENSION(1) :: buf_shape
762
763	REAL(wp) :: t1
764	REAL(wp) :: t2
765
766	REAL(wp), POINTER, DIMENSION(:) :: buf
767	REAL(wp), POINTER, DIMENSION(:,:) :: data_2d
768	REAL(wp), POINTER, DIMENSION(:,:,:) :: data_3d
769	TYPE(pedef), POINTER :: ape
770	TYPE(arraydef), POINTER :: ar
771	INTEGER(idp), POINTER, DIMENSION(:) :: ibuf !<
772	INTEGER(idp), POINTER, DIMENSION(:,:) :: idata_2d !<
773
774	!
775	!-- Synchronization of the model is done in pmci_synchronize.
776	!-- Therefore the RMA window can be filled without
777	!-- sychronization at this point and a barrier is not necessary.
778
779	!-- In case waittime is present, the following barrier is necessary to
780	!-- insure the same number of barrier calls on parent and child
781	!-- This means, that here on child side two barriers are call successively
782	!-- The parent is filling its buffer between the two barrier calls
783
784	!-- Please note that waittime has to be set in pmc_s_fillbuffer AND
785	!-- pmc_c_getbuffer
786	IF ( PRESENT( waittime ) ) THEN
787	t1 = pmc_time()
788	CALL MPI_BARRIER( me%intra_comm, ierr )
789	t2 = pmc_time()
790	waittime = t2 - t1
791	ENDIF
792
793	lo_ptrans = .FALSE.
794	IF ( PRESENT( particle_transfer)) lo_ptrans = particle_transfer
795
796	!
797	!-- Wait for buffer is filled.
798	!
799	!-- The parent side (in pmc_s_fillbuffer) is filling the buffer in the MPI RMA window
800	!-- When the filling is complet, a MPI_BARRIER is called.
801	!-- The child is not allowd to access the parent-buffer before it is completely filled
802	!-- therefore the following barrier is required.
803
804	CALL MPI_BARRIER( me%intra_comm, ierr )
805
806	DO ip = 1, me%inter_npes
807	ape => me%pes(ip)
808	DO j = 1, ape%nr_arrays
809	ar => ape%array_list(j)
810
811	IF ( ar%dimkey == 2 .AND. .NOT.lo_ptrans) THEN
812	nr = ape%nrele
813	ELSEIF ( ar%dimkey == 3 .AND. .NOT.lo_ptrans) THEN
814	nr = ape%nrele * ar%a_dim(1)
815	ELSE IF ( ar%dimkey == 22 .AND. lo_ptrans) THEN
816	nr = ape%nrele
817	ELSE
818	CYCLE ! Particle array ar not transferd here
819	ENDIF
820	buf_shape(1) = nr
821	IF ( lo_ptrans ) THEN
822	CALL C_F_POINTER( ar%recvbuf, ibuf, buf_shape )
823	ELSE
824	CALL C_F_POINTER( ar%recvbuf, buf, buf_shape )
825	ENDIF
826	!
827	!-- MPI passive target RMA
828	!-- One data array is fetcht from MPI RMA window on parent
829
830	IF ( nr > 0 ) THEN
831	target_disp = ar%recvindex - 1
832	CALL MPI_WIN_LOCK( MPI_LOCK_SHARED , ip-1, 0, &
833	me%win_parent_child, ierr )
834	IF ( lo_ptrans ) THEN
835	CALL MPI_GET( ibuf, nr8, MPI_BYTE, ip-1, target_disp, nr8, MPI_BYTE, & !There is no MPI_INTEGER8 datatype
836	me%win_parent_child, ierr )
837	ELSE
838	CALL MPI_GET( buf, nr, MPI_REAL, ip-1, target_disp, nr, &
839	MPI_REAL, me%win_parent_child, ierr )
840	ENDIF
841	CALL MPI_WIN_UNLOCK( ip-1, me%win_parent_child, ierr )
842	ENDIF
843	myindex = 1
844	IF ( ar%dimkey == 2 .AND. .NOT.lo_ptrans) THEN
845
846	CALL C_F_POINTER( ar%data, data_2d, ar%a_dim(1:2) )
847	DO ij = 1, ape%nrele
848	data_2d(ape%locind(ij)%j,ape%locind(ij)%i) = buf(myindex)
849	myindex = myindex + 1
850	ENDDO
851
852	ELSEIF ( ar%dimkey == 3 .AND. .NOT.lo_ptrans) THEN
853
854	CALL C_F_POINTER( ar%data, data_3d, ar%a_dim(1:3) )
855	DO ij = 1, ape%nrele
856	data_3d(:,ape%locind(ij)%j,ape%locind(ij)%i) = &
857	buf(myindex:myindex+ar%a_dim(1)-1)
858	myindex = myindex+ar%a_dim(1)
859	ENDDO
860
861	ELSEIF ( ar%dimkey == 22 .AND. lo_ptrans) THEN
862	CALL C_F_POINTER( ar%data, idata_2d, ar%a_dim(1:2) )
863
864	DO ij = 1, ape%nrele
865	idata_2d(ape%locind(ij)%j,ape%locind(ij)%i) = ibuf(myindex)
866	myindex = myindex + 1
867	ENDDO
868
869	ENDIF
870	ENDDO
871	ENDDO
872
873	END SUBROUTINE pmc_c_getbuffer
874
875
876
877	SUBROUTINE pmc_c_putbuffer( waittime , particle_transfer )
878
879	IMPLICIT NONE
880
881	REAL(wp), INTENT(OUT), OPTIONAL :: waittime !<
882	LOGICAL, INTENT(IN), OPTIONAL :: particle_transfer !<
883
884	LOGICAL :: lo_ptrans!<
885
886	INTEGER(iwp) :: ierr !<
887	INTEGER(iwp) :: ij !<
888	INTEGER(iwp) :: ip !<
889	INTEGER(iwp) :: j !<
890	INTEGER(iwp) :: myindex !<
891
892	INTEGER(iwp), DIMENSION(1) :: buf_shape !<
893
894	REAL(wp) :: t1 !<
895	REAL(wp) :: t2 !<
896
897	REAL(wp), POINTER, DIMENSION(:) :: buf !<
898	REAL(wp), POINTER, DIMENSION(:,:) :: data_2d !<
899	REAL(wp), POINTER, DIMENSION(:,:,:) :: data_3d !<
900
901	INTEGER(idp), POINTER, DIMENSION(:) :: ibuf !<
902	INTEGER(idp), POINTER, DIMENSION(:,:) :: idata_2d !<
903
904	TYPE(pedef), POINTER :: ape !<
905	TYPE(arraydef), POINTER :: ar !<
906
907	!
908	!-- Wait for empty buffer
909	!-- Switch RMA epoche
910
911	t1 = pmc_time()
912	CALL MPI_BARRIER( me%intra_comm, ierr )
913	t2 = pmc_time()
914	IF ( PRESENT( waittime ) ) waittime = t2 - t1
915
916	lo_ptrans = .FALSE.
917	IF ( PRESENT( particle_transfer)) lo_ptrans = particle_transfer
918
919	DO ip = 1, me%inter_npes
920	ape => me%pes(ip)
921	DO j = 1, ape%nr_arrays
922	ar => aPE%array_list(j)
923	myindex = 1
924
925	IF ( ar%dimkey == 2 .AND. .NOT.lo_ptrans ) THEN
926
927	buf_shape(1) = ape%nrele
928	CALL C_F_POINTER( ar%sendbuf, buf, buf_shape )
929	CALL C_F_POINTER( ar%data, data_2d, ar%a_dim(1:2) )
930	DO ij = 1, ape%nrele
931	buf(myindex) = data_2d(ape%locind(ij)%j,ape%locind(ij)%i)
932	myindex = myindex + 1
933	ENDDO
934
935	ELSEIF ( ar%dimkey == 3 .AND. .NOT.lo_ptrans ) THEN
936
937	buf_shape(1) = ape%nrele*ar%a_dim(1)
938	CALL C_F_POINTER( ar%sendbuf, buf, buf_shape )
939	CALL C_F_POINTER( ar%data, data_3d, ar%a_dim(1:3) )
940	DO ij = 1, ape%nrele
941	buf(myindex:myindex+ar%a_dim(1)-1) = &
942	data_3d(:,ape%locind(ij)%j,ape%locind(ij)%i)
943	myindex = myindex + ar%a_dim(1)
944	ENDDO
945
946	ELSE IF ( ar%dimkey == 22 .AND. lo_ptrans) THEN
947
948	buf_shape(1) = ape%nrele
949	CALL C_F_POINTER( ar%sendbuf, ibuf, buf_shape )
950	CALL C_F_POINTER( ar%data, idata_2d, ar%a_dim(1:2) )
951
952	DO ij = 1, ape%nrele
953	ibuf(myindex) = idata_2d(ape%locind(ij)%j,ape%locind(ij)%i)
954	myindex = myindex + 1
955	ENDDO
956
957	ENDIF
958	ENDDO
959	ENDDO
960	!
961	!-- Buffer is filled
962	!-- Switch RMA epoche
963
964	CALL MPI_Barrier(me%intra_comm, ierr)
965
966	END SUBROUTINE pmc_c_putbuffer
967
968	#endif
969	END MODULE pmc_child

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