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source: palm/trunk/SOURCE/pmc_server.f90 @ 1762

Last change on this file since 1762 was 1762, checked in by hellstea, 8 years ago
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1	MODULE pmc_server
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 1997-2015 Leibniz Universitaet Hannover
18	!--------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: pmc_server.f90 1762 2016-02-25 12:31:13Z hellstea $
26	!
27	! Intoduction of the pure FORTRAN Palm Model Coupler (PMC) 12.11.2015 K. Ketelsen
28	!
29	! Description:
30	! ------------
31	!
32	! Server part of Palm Model Coupler
33	!------------------------------------------------------------------------------!
34
35	use, intrinsic :: iso_c_binding
36
37	USE mpi
38	USE kinds, ONLY: wp, iwp
39	USE PMC_general, ONLY: ClientDef, PMC_MAX_MODELL,PMC_sort, DA_NameDef, DA_Desclen, DA_Namelen, &
40	PMC_G_SetName, PMC_G_GetName, PeDef, ArrayDef
41	USE PMC_handle_communicator, ONLY: m_model_comm,m_model_rank,m_model_npes, m_to_client_comm, &
42	PMC_Server_for_Client, m_world_rank
43	USE PMC_MPI_wrapper, ONLY: PMC_Send_to_Client, PMC_Recv_from_Client, PMC_Bcast, PMC_Inter_Bcast, &
44	PMC_Alloc_mem, PMC_Time
45
46	IMPLICIT none
47	PRIVATE
48	SAVE
49
50	TYPE ClientIndexDef
51	INTEGER :: NrPoints
52	INTEGER,DIMENSION(:,:),allocatable :: index_list_2d
53	END TYPE ClientIndexDef
54
55	TYPE(ClientDef),DIMENSION(PMC_MAX_MODELL) :: Clients
56	TYPE(ClientIndexDef),DIMENSION(PMC_MAX_MODELL) :: indClients
57
58	PUBLIC PMC_Server_for_Client
59
60	INTEGER, PARAMETER :: dp = wp
61
62	! INTERFACE section
63
64	INTERFACE PMC_ServerInit
65	MODULE procedure PMC_ServerInit
66	END INTERFACE PMC_ServerInit
67
68	INTERFACE PMC_S_Set_2D_index_list
69	MODULE procedure PMC_S_Set_2D_index_list
70	END INTERFACE PMC_S_Set_2D_index_list
71
72	INTERFACE PMC_S_GetNextArray
73	MODULE procedure PMC_S_GetNextArray
74	END INTERFACE PMC_S_GetNextArray
75
76	INTERFACE PMC_S_Set_DataArray
77	MODULE procedure PMC_S_Set_DataArray_2d
78	MODULE procedure PMC_S_Set_DataArray_3d
79	END INTERFACE PMC_S_Set_DataArray
80
81	INTERFACE PMC_S_setInd_and_AllocMem
82	MODULE procedure PMC_S_setInd_and_AllocMem
83	END INTERFACE PMC_S_setInd_and_AllocMem
84
85	INTERFACE PMC_S_FillBuffer
86	MODULE procedure PMC_S_FillBuffer
87	END INTERFACE PMC_S_FillBuffer
88
89	INTERFACE PMC_S_GetData_from_Buffer
90	MODULE procedure PMC_S_GetData_from_Buffer
91	END INTERFACE PMC_S_GetData_from_Buffer
92
93	! PUBLIC section
94
95	PUBLIC PMC_ServerInit, PMC_S_Set_2D_index_list, PMC_S_GetNextArray, PMC_S_Set_DataArray
96	PUBLIC PMC_S_setInd_and_AllocMem, PMC_S_FillBuffer, PMC_S_GetData_from_Buffer
97
98	CONTAINS
99
100	SUBROUTINE PMC_ServerInit
101	IMPLICIT none
102	INTEGER :: i
103	INTEGER :: j
104	INTEGER :: ClientId
105	INTEGER :: istat
106
107	do i=1,size(PMC_Server_for_Client)-1
108	if(m_model_comm == 0) write(0,*) 'PMC_Server: Initialize client Id',PMC_Server_for_Client(i)
109
110	ClientId = PMC_Server_for_Client(i)
111
112	Clients(ClientId)%model_comm = m_model_comm
113	Clients(ClientId)%inter_comm = m_to_client_comm(ClientId)
114
115	! Get rank and size
116	CALL MPI_Comm_rank (Clients(ClientId)%model_comm, Clients(ClientId)%model_rank, istat);
117	CALL MPI_Comm_size (Clients(ClientId)%model_comm, Clients(ClientId)%model_npes, istat);
118	CALL MPI_Comm_remote_size (Clients(ClientId)%inter_comm, Clients(ClientId)%inter_npes, istat);
119
120	! Intra communicater is used for MPI_Get
121	CALL MPI_Intercomm_merge (Clients(ClientId)%inter_comm, .false., Clients(ClientId)%intra_comm, istat);
122	CALL MPI_Comm_rank (Clients(ClientId)%intra_comm, Clients(ClientId)%intra_rank, istat);
123
124	write(9,*) 'ClientId ',i,ClientId,m_world_rank, Clients(ClientId)%inter_npes
125
126	ALLOCATE (Clients(ClientId)%PEs(Clients(ClientId)%inter_npes))
127
128	do j=1,Clients(ClientId)%inter_npes ! Loop over all client PEs
129	NULLIFY(Clients(ClientId)%PEs(j)%Arrays)
130	end do
131
132	CALL Get_DA_names_from_client (ClientId)
133	end do
134
135	return
136	END SUBROUTINE PMC_ServerInit
137
138	SUBROUTINE PMC_S_Set_2D_index_list (ClientId, index_list)
139	IMPLICIT none
140	INTEGER,INTENT(IN) :: ClientId
141	INTEGER,DIMENSION(:,:),INTENT(INOUT) :: index_list !Index list will be modified in sort, therefore INOUT
142
143	!-- Local variables
144	INTEGER :: ip,is,ie,ian,ic,n
145	INTEGER :: istat
146
147	if(m_model_rank == 0) then
148	CALL PMC_sort (index_list, 6) ! Sort to ascending Server PE
149	is = 1
150
151	do ip=0,m_model_npes-1
152
153	! Split into Server PEs
154	ie = is-1 !there may be no entry for this PE
155	if(is <= size(index_list,2) .and. ie >= 0) then
156	do while ( index_list(6,ie+1) == ip)
157	ie = ie+1
158	if( ie == size(index_list,2)) EXIT
159	end do
160
161	ian = ie-is+1
162	else
163	is = -1
164	ie = -2
165	ian = 0
166	end if
167
168	! Send data to other server PEs
169
170	if(ip == 0) then
171	indClients(ClientId)%NrPoints = ian
172	if(ian > 0) then
173	ALLOCATE (indClients(ClientId)%index_list_2d(6,ian))
174	indClients(ClientId)%index_list_2d(:,1:ian) = index_list(:,is:ie)
175	end if
176	else
177	CALL MPI_Send (ian, 1, MPI_INTEGER, ip, 1000, m_model_comm, istat)
178	if(ian > 0) then
179	CALL MPI_Send (index_list(1,is), 6*ian, MPI_INTEGER, ip, 1001, &
180	m_model_comm, istat)
181	end if
182	end if
183	is = ie+1
184	end do
185	else
186	CALL MPI_Recv (indClients(ClientId)%NrPoints, 1, MPI_INTEGER, 0, 1000, m_model_comm, &
187	MPI_STATUS_IGNORE, istat)
188	ian = indClients(ClientId)%NrPoints
189	if(ian > 0) then
190	ALLOCATE(indClients(ClientId)%index_list_2d(6,ian))
191	CALL MPI_RECV (indClients(ClientId)%index_list_2d, 6*ian, MPI_INTEGER, 0, 1001, &
192	m_model_comm, MPI_STATUS_IGNORE, istat)
193	end if
194	end if
195
196	CALL Set_PE_index_list (ClientId,Clients(ClientId),indClients(ClientId)%index_list_2d,indClients(ClientId)%NrPoints)
197
198	return
199	END SUBROUTINE PMC_S_Set_2D_index_list
200
201	logical function PMC_S_GetNextArray (ClientId, myName,Client_PeIndex)
202	INTEGER,INTENT(IN) :: ClientId
203	CHARACTER(len=*),INTENT(OUT) :: myName
204
205	!-- local variables
206	INTEGER :: MyCoupleIndex
207	logical :: MyLast
208	CHARACTER(len=DA_Namelen) :: loName
209	INTEGER,INTENT(IN),optional :: Client_PeIndex
210
211	loName = ' '
212
213	CALL PMC_G_GetName (clients(ClientId), MyCoupleIndex, loName, MyLast, Client_PeIndex)
214
215	myName = loName
216
217	PMC_S_GetNextArray = .NOT. MyLast ! Return true if valid array
218
219	return
220	END function PMC_S_GetNextArray
221
222	SUBROUTINE PMC_S_Set_DataArray_2d (ClientId, array)
223	IMPLICIT none
224	INTEGER,INTENT(IN) :: ClientId
225	REAL(kind=dp),INTENT(IN),DIMENSION(:,:) :: array
226	!-- local variables
227	INTEGER :: NrDims
228	INTEGER,DIMENSION (4) :: dims
229	INTEGER :: dim_order
230	TYPE(c_ptr) :: array_adr
231
232	dims = 1
233
234	NrDims = 2
235	dims(1) = size(array,1)
236	dims(2) = size(array,2)
237	dim_order = 2
238
239	array_adr = c_loc(array)
240
241	CALL PMC_S_SetArray (ClientId, NrDims, dims, dim_order, array_adr)
242
243	return
244	END SUBROUTINE PMC_S_Set_DataArray_2d
245
246	SUBROUTINE PMC_S_Set_DataArray_3d (ClientId, array, nz_cl, nz)
247	IMPLICIT none
248	INTEGER,INTENT(IN) :: ClientId
249	REAL(kind=dp),INTENT(IN),DIMENSION(:,:,:) :: array
250	INTEGER,INTENT(IN) :: nz_cl
251	INTEGER,INTENT(IN) :: nz
252	!-- local variables
253	INTEGER :: NrDims
254	INTEGER,DIMENSION (4) :: dims
255	INTEGER :: dim_order
256	TYPE(c_ptr) :: array_adr
257
258	dims = 1
259
260	dims = 0
261	NrDims = 3
262	dims(1) = size(array,1)
263	dims(2) = size(array,2)
264	dims(3) = size(array,3)
265	dim_order = 33
266	dims(4) = nz_cl+dims(1)-nz ! works for first dimension 1:nz and 0:nz+1
267
268	array_adr = c_loc(array)
269
270	CALL PMC_S_SetArray (ClientId, NrDims, dims, dim_order, array_adr)
271
272	return
273	END SUBROUTINE PMC_S_Set_DataArray_3d
274
275	SUBROUTINE PMC_S_setInd_and_AllocMem (ClientId)
276	IMPLICIT none
277	INTEGER,INTENT(IN) :: ClientId
278
279	INTEGER :: i, istat, ierr
280	INTEGER :: arlen, myIndex, tag
281	INTEGER :: rCount ! count MPI requests
282	INTEGER(kind=8) :: bufsize ! Size of MPI data Window
283	TYPE(PeDef),POINTER :: aPE
284	TYPE(ArrayDef),POINTER :: ar
285	CHARACTER(len=DA_Namelen) :: myName
286	INTEGER,DIMENSION(1024) :: req
287	Type(c_ptr) :: base_ptr
288	REAL(kind=wp),DIMENSION(:),POINTER :: base_array
289	INTEGER(KIND=MPI_ADDRESS_KIND) :: WinSize
290
291	myIndex = 1
292	rCount = 0
293	bufsize = 8
294
295	! First stride, Compute size and set index
296
297	do i=1,Clients(ClientId)%inter_npes
298	aPE => Clients(ClientId)%PEs(i)
299	tag = 200
300	do while (PMC_S_GetNextArray ( ClientId, myName,i))
301	ar => aPE%Arrays
302	if(ar%dim_order == 2) then
303	arlen = aPE%NrEle; ! 2D
304	else if(ar%dim_order == 33) then
305	arlen = aPE%NrEle * ar%A_dim(4); ! PALM 3D
306	else
307	arlen = -1
308	end if
309	ar%BufIndex = myIndex
310
311	tag = tag+1
312	rCount = rCount+1
313	CALL MPI_Isend (myIndex, 1, MPI_INTEGER, i-1, tag, Clients(ClientId)%inter_comm, req(rCount),ierr)
314
315	if(rCount == 1024) then ! Maximum of 1024 outstanding requests
316	CALL MPI_Waitall (rCount, req, MPI_STATUSES_IGNORE, ierr)
317	rCount = 0;
318	end if
319
320	myIndex = myIndex+arlen
321	bufsize = bufsize+arlen
322	ar%BufSize = arlen
323
324	end do
325	if(rCount > 0) then ! Wait for all send completed
326	CALL MPI_Waitall (rCount, req, MPI_STATUSES_IGNORE, ierr)
327	end if
328	end do
329
330	! Create RMA (One Sided Communication) window for data buffer
331
332	CALL PMC_Alloc_mem (base_array, bufsize, base_ptr)
333	Clients(ClientId)%TotalBufferSize = bufsize*wp !Total buffer size in Byte
334
335	WinSize = bufsize*wp
336	! write(9,*) 'PMC_S_SetInd_and_Mem ',m_model_rank,Clients(ClientId)%inter_npes,WinSize,bufsize
337	CALL MPI_Win_create (base_array, WinSize, wp, MPI_INFO_NULL, Clients(ClientId)%intra_comm, Clients(ClientId)%BufWin, ierr);
338	CALL MPI_Win_fence (0, Clients(ClientId)%BufWin, ierr); ! Open Window to set data
339	CALL MPI_Barrier(Clients(ClientId)%intra_comm, ierr)
340
341	! Second stride, Set Buffer pointer
342
343	do i=1,Clients(ClientId)%inter_npes
344	aPE => Clients(ClientId)%PEs(i)
345	do while (PMC_S_GetNextArray ( ClientId, myName,i))
346	ar => aPE%Arrays
347	ar%SendBuf = c_loc(base_array(ar%BufIndex)) !kk Adressrechnung ueberlegen
348	if(ar%BufIndex+ar%BufSize > bufsize) then
349	write(0,'(a,i4,4i7,1x,a)') 'Buffer too small ',i,ar%BufIndex,ar%BufSize,ar%BufIndex+ar%BufSize,bufsize,trim(myName)
350	CALL MPI_Abort (MPI_COMM_WORLD, istat, ierr)
351	end if
352	end do
353	end do
354
355	return
356	END SUBROUTINE PMC_S_setInd_and_AllocMem
357
358	SUBROUTINE PMC_S_FillBuffer (ClientId, WaitTime)
359	IMPLICIT none
360	INTEGER,INTENT(IN) :: ClientId
361	REAL(kind=dp),INTENT(OUT),optional :: WaitTime
362
363	!-- local variables
364	INTEGER :: ip,ij,istat,ierr
365	INTEGER :: myIndex
366	REAL(kind=dp) :: t1,t2
367	TYPE(PeDef),POINTER :: aPE
368	TYPE(ArrayDef),POINTER :: ar
369	CHARACTER(len=DA_Namelen) :: myName
370	INTEGER,DIMENSION(1) :: buf_shape
371	REAL(kind=wp),POINTER,DIMENSION(:) :: buf
372	REAL(kind=wp),POINTER,DIMENSION(:,:) :: data_2d
373	REAL(kind=wp),POINTER,DIMENSION(:,:,:) :: data_3d
374
375	t1 = PMC_Time()
376	CALL MPI_Barrier(Clients(ClientId)%intra_comm, ierr) ! Wait for buffer empty
377	t2 = PMC_Time()
378	if(present(WaitTime)) WaitTime = t2-t1
379
380	do ip=1,Clients(ClientId)%inter_npes
381	aPE => Clients(ClientId)%PEs(ip)
382	do while (PMC_S_GetNextArray ( ClientId, myName,ip))
383	ar => aPE%Arrays
384	myIndex=1
385	if(ar%dim_order == 2) then
386	buf_shape(1) = aPE%NrEle
387	CALL c_f_pointer(ar%SendBuf, buf, buf_shape)
388	CALL c_f_pointer(ar%data, data_2d, ar%A_dim(1:2))
389	do ij=1,aPE%NrEle
390	buf(myIndex) = data_2d(aPE%locInd(ij)%j,aPE%locInd(ij)%i)
391	myIndex = myIndex+1
392	end do
393	else if(ar%dim_order == 33) then
394	buf_shape(1) = aPE%NrEle*ar%A_dim(4)
395	CALL c_f_pointer(ar%SendBuf, buf, buf_shape)
396	CALL c_f_pointer(ar%data, data_3d, ar%A_dim(1:3))
397	do ij=1,aPE%NrEle
398	buf(myIndex:myIndex+ar%A_dim(4)-1) = data_3d(1:ar%A_dim(4),aPE%locInd(ij)%j,aPE%locInd(ij)%i)
399	myIndex = myIndex+ar%A_dim(4)
400	end do
401	else
402	write(0,*) "Illegal Order of Dimension ",ar%dim_order
403	CALL MPI_Abort (MPI_COMM_WORLD, istat, ierr);
404
405	end if
406	end do
407	end do
408
409	CALL MPI_Barrier(Clients(ClientId)%intra_comm, ierr) ! buffer is full
410
411	return
412	END SUBROUTINE PMC_S_FillBuffer
413
414	SUBROUTINE PMC_S_GetData_from_Buffer (ClientId, WaitTime)
415	IMPLICIT none
416	INTEGER,INTENT(IN) :: ClientId
417	REAL(kind=dp),INTENT(OUT),optional :: WaitTime
418
419	!-- local variables
420	INTEGER :: ip,ij,istat,ierr
421	INTEGER :: myIndex
422	REAL(kind=dp) :: t1,t2
423	TYPE(PeDef),POINTER :: aPE
424	TYPE(ArrayDef),POINTER :: ar
425	CHARACTER(len=DA_Namelen) :: myName
426	INTEGER,DIMENSION(1) :: buf_shape
427	REAL(kind=wp),POINTER,DIMENSION(:) :: buf
428	REAL(kind=wp),POINTER,DIMENSION(:,:) :: data_2d
429	REAL(kind=wp),POINTER,DIMENSION(:,:,:) :: data_3d
430
431	t1 = PMC_Time()
432	CALL MPI_Barrier(Clients(ClientId)%intra_comm, ierr) ! Wait for MPI_Put from client
433	t2 = PMC_Time()
434	if(present(WaitTime)) WaitTime = t2-t1
435
436	do ip=1,Clients(ClientId)%inter_npes
437	aPE => Clients(ClientId)%PEs(ip)
438	do while (PMC_S_GetNextArray ( ClientId, myName,ip))
439	ar => aPE%Arrays
440	myIndex=1
441	if(ar%dim_order == 2) then
442	buf_shape(1) = aPE%NrEle
443	CALL c_f_pointer(ar%SendBuf, buf, buf_shape)
444	CALL c_f_pointer(ar%data, data_2d, ar%A_dim(1:2))
445	do ij=1,aPE%NrEle
446	data_2d(aPE%locInd(ij)%j,aPE%locInd(ij)%i) = buf(myIndex)
447	myIndex = myIndex+1
448	end do
449	else if(ar%dim_order == 33) then
450	buf_shape(1) = aPE%NrEle*ar%A_dim(4)
451	CALL c_f_pointer(ar%SendBuf, buf, buf_shape)
452	CALL c_f_pointer(ar%data, data_3d, ar%A_dim(1:3))
453	do ij=1,aPE%NrEle
454	data_3d(1:ar%A_dim(4),aPE%locInd(ij)%j,aPE%locInd(ij)%i) = buf(myIndex:myIndex+ar%A_dim(4)-1)
455	myIndex = myIndex+ar%A_dim(4)
456	end do
457	else
458	write(0,*) "Illegal Order of Dimension ",ar%dim_order
459	CALL MPI_Abort (MPI_COMM_WORLD, istat, ierr);
460
461	end if
462	end do
463	end do
464
465	CALL MPI_Barrier(Clients(ClientId)%intra_comm, ierr) ! data copy finished, buffer is free for use agein
466
467	return
468	END SUBROUTINE PMC_S_GetData_from_Buffer
469
470	! Private SUBROUTINEs
471
472	SUBROUTINE Get_DA_names_from_client (ClientId)
473	IMPLICIT none
474	INTEGER,INTENT(IN) :: ClientId
475	!-- local variables
476	type(DA_NameDef) :: myName
477
478	! Get Data Array Description and Name from Client
479
480	do
481	CALL PMC_Bcast ( myName%couple_index, 0, comm=m_to_client_comm(ClientId))
482	if(myName%couple_index == -1) EXIT
483	CALL PMC_Bcast ( myName%ServerDesc, 0, comm=m_to_client_comm(ClientId))
484	CALL PMC_Bcast ( myName%NameOnServer, 0, comm=m_to_client_comm(ClientId))
485	CALL PMC_Bcast ( myName%ClientDesc, 0, comm=m_to_client_comm(ClientId))
486	CALL PMC_Bcast ( myName%NameOnClient, 0, comm=m_to_client_comm(ClientId))
487
488	CALL PMC_G_SetName (clients(ClientID), myName%couple_index, myName%NameOnServer )
489	end do
490
491	return
492	END SUBROUTINE Get_DA_names_from_client
493
494	SUBROUTINE PMC_S_SetArray (ClientId, NrDims, dims, dim_order, array_adr)
495	IMPLICIT none
496
497	INTEGER,INTENT(IN) :: ClientId
498	INTEGER,INTENT(IN) :: NrDims
499	INTEGER,INTENT(IN),DIMENSION(:) :: dims
500	INTEGER,INTENT(IN) :: dim_order
501	TYPE(c_ptr),INTENT(IN) :: array_adr
502
503	INTEGER :: i
504	TYPE(PeDef),POINTER :: aPE
505	TYPE(ArrayDef),POINTER :: ar
506	CHARACTER(len=DA_Namelen) :: myName
507
508	! Set Array for Client interPE 0
509
510	do i=1,Clients(ClientId)%inter_npes
511	aPE => Clients(ClientId)%PEs(i)
512	ar => aPE%Arrays
513	ar%NrDims = NrDims
514	ar%A_dim = dims
515	ar%dim_order = dim_order
516	ar%data = array_adr
517	end do
518
519	return
520	END SUBROUTINE PMC_S_SetArray
521
522
523	SUBROUTINE Set_PE_index_list (ClientId, myClient,index_list,NrP)
524	IMPLICIT none
525
526	INTEGER,INTENT(IN) :: ClientId
527	TYPE(ClientDef),INTENT(INOUT) :: myClient
528	INTEGER,INTENT(IN),DIMENSION(:,:) :: index_list
529	INTEGER,INTENT(IN) :: NrP
530
531	!-- local variables
532	INTEGER :: i,j,ind,ierr,i2
533	TYPE(PeDef),POINTER :: aPE
534	INTEGER :: RemPE
535	INTEGER,DIMENSION(myClient%inter_npes) :: RemInd
536	INTEGER,DIMENSION(:),POINTER :: RemIndw
537	INTEGER,DIMENSION(:),POINTER :: RLdef
538	INTEGER(KIND=MPI_ADDRESS_KIND) :: WinSize
539	INTEGER :: indWin,indWin2
540
541	! First, count entries for every remote client PE
542
543	do i=1,myClient%inter_npes
544	aPE => myClient%PEs(i)
545	aPE%NrEle = 0
546	end do
547
548	do j=1,NrP ! loop over number of cells coarse grid
549	RemPE = index_list(5,j)+1 ! Pe number remote PE
550	aPE => myClient%PEs(RemPE)
551	aPE% NrEle = aPE% NrEle+1 ! Increment Number of elements for this client Pe
552	end do
553
554	do i=1,myClient%inter_npes
555	aPE => myClient%PEs(i)
556	ALLOCATE(aPE%locInd(aPE%NrEle))
557	end do
558
559	RemInd = 0
560
561	! Second, Create lists
562
563	do j=1,NrP ! loop over number of cells coarse grid
564	RemPE = index_list(5,j)+1 ! Pe number remote PE
565	aPE => myClient%PEs(RemPE)
566	RemInd(RemPE) = RemInd(RemPE)+1
567	ind = RemInd(RemPE)
568	aPE%locInd(ind)%i = index_list(1,j)
569	aPE%locInd(ind)%j = index_list(2,j)
570	end do
571
572	! Prepare Number of Elements for Client PEs
573	CALL PMC_Alloc_mem (RLdef, myClient%inter_npes*2)
574	WinSize = myClient%inter_npesc_sizeof(i)2 ! Number of Client PEs * size of INTEGER (i just arbitrary INTEGER)
575
576	CALL MPI_Win_create (RLdef, WinSize, iwp, MPI_INFO_NULL, myClient%intra_comm, indWin, ierr);
577	CALL MPI_Win_fence (0, indWin, ierr); ! Open Window to set data
578
579	RLdef(1) = 0 ! Index on Remote PE 0
580	RLdef(2) = RemInd(1) ! Number of Elements on Rem PE 0
581
582	do i=2,myClient%inter_npes ! Reserve Buffer for index array
583	i2 = (i-1)*2+1
584	RLdef(i2) = RLdef(i2-2) + RLdef(i2-1)*2 ! Index on Remote PE
585	RLdef(i2+1) = RemInd(i) ! Number of Elements on Remote PE
586	end do
587
588	CALL MPI_Win_fence (0, indWin, ierr); ! Close Window to allow client to access data
589	CALL MPI_Win_fence (0, indWin, ierr); ! Client has retrieved data
590
591	i2 = 2*myClient%inter_npes-1
592	WinSize = (RLdef(i2)+RLdef(i2+1))*2
593	WinSize = max(WinSize,1) ! Make sure, MPI_Alloc_mem works
594
595	CALL PMC_Alloc_mem (RemIndw, int(WinSize))
596
597	CALL MPI_Barrier (m_model_comm, ierr)
598	CALL MPI_Win_create (RemIndw, WinSize*c_sizeof(i), iwp, MPI_INFO_NULL, myClient%intra_comm, indWin2, ierr);
599
600	CALL MPI_Win_fence (0, indWin2, ierr); ! Open Window to set data
601	do j=1,NrP ! this loop creates the 2D index list
602	RemPE = index_list(5,j)+1 ! Pe number remote PE
603	aPE => myClient%PEs(RemPE)
604	i2 = RemPE*2-1
605	ind = RLdef(i2)+1
606	RemIndw(ind) = index_list(3,j)
607	RemIndw(ind+1) = index_list(4,j)
608	RLdef(i2) = RLdef(i2)+2
609	end do
610	CALL MPI_Win_fence (0, indWin2, ierr); !all data set
611
612	CALL MPI_Barrier(myClient%intra_comm, ierr) ! Dont know why, but this barrier is necessary before we can free the windows
613
614	CALL MPI_Win_free(indWin, ierr)
615	CALL MPI_Win_free(indWin2, ierr)
616
617	! Sollte funktionieren, Problem mit MPI implementation
618	! https://www.lrz.de/services/software/parallel/mpi/onesided
619	! CALL MPI_Free_mem (RemIndw, ierr)
620
621	return
622	END SUBROUTINE Set_PE_index_list
623
624	END MODULE pmc_server

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