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source: palm/trunk/SOURCE/pmc_server.f90 @ 1764

Last change on this file since 1764 was 1764, checked in by raasch, 8 years ago
update of the nested domain system + some bugfixes
Property svn:keywords set to `Id`
File size: 24.5 KB

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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	! cpp-statement added (nesting can only be used in parallel mode)
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: pmc_server.f90 1764 2016-02-28 12:45:19Z raasch $
27	!
28	! 1762 2016-02-25 12:31:13Z hellstea
29	! Initial revision by K. Ketelsen
30	!
31	! Description:
32	! ------------
33	!
34	! Server part of Palm Model Coupler
35	!------------------------------------------------------------------------------!
36
37	#if defined( __parallel )
38	use, intrinsic :: iso_c_binding
39
40	#if defined( __lc )
41	USE MPI
42	#else
43	INCLUDE "mpif.h"
44	#endif
45	USE kinds
46	USE PMC_general, ONLY: ClientDef, PMC_MAX_MODELL,PMC_sort, DA_NameDef, DA_Desclen, DA_Namelen, &
47	PMC_G_SetName, PMC_G_GetName, PeDef, ArrayDef
48	USE PMC_handle_communicator, ONLY: m_model_comm,m_model_rank,m_model_npes, m_to_client_comm, &
49	PMC_Server_for_Client, m_world_rank
50	USE PMC_MPI_wrapper, ONLY: PMC_Send_to_Client, PMC_Recv_from_Client, PMC_Bcast, PMC_Inter_Bcast, &
51	PMC_Alloc_mem, PMC_Time
52
53	IMPLICIT none
54	PRIVATE
55	SAVE
56
57	TYPE ClientIndexDef
58	INTEGER :: NrPoints
59	INTEGER,DIMENSION(:,:),allocatable :: index_list_2d
60	END TYPE ClientIndexDef
61
62	TYPE(ClientDef),DIMENSION(PMC_MAX_MODELL) :: Clients
63	TYPE(ClientIndexDef),DIMENSION(PMC_MAX_MODELL) :: indClients
64
65	PUBLIC PMC_Server_for_Client
66
67	!-- TO_DO: what is the meaning of this? Could variables declared in this module
68	!-- also have single precision?
69	! INTEGER, PARAMETER :: dp = wp
70
71	! INTERFACE section
72
73	INTERFACE PMC_ServerInit
74	MODULE procedure PMC_ServerInit
75	END INTERFACE PMC_ServerInit
76
77	INTERFACE PMC_S_Set_2D_index_list
78	MODULE procedure PMC_S_Set_2D_index_list
79	END INTERFACE PMC_S_Set_2D_index_list
80
81	INTERFACE PMC_S_GetNextArray
82	MODULE procedure PMC_S_GetNextArray
83	END INTERFACE PMC_S_GetNextArray
84
85	INTERFACE PMC_S_Set_DataArray
86	MODULE procedure PMC_S_Set_DataArray_2d
87	MODULE procedure PMC_S_Set_DataArray_3d
88	END INTERFACE PMC_S_Set_DataArray
89
90	INTERFACE PMC_S_setInd_and_AllocMem
91	MODULE procedure PMC_S_setInd_and_AllocMem
92	END INTERFACE PMC_S_setInd_and_AllocMem
93
94	INTERFACE PMC_S_FillBuffer
95	MODULE procedure PMC_S_FillBuffer
96	END INTERFACE PMC_S_FillBuffer
97
98	INTERFACE PMC_S_GetData_from_Buffer
99	MODULE procedure PMC_S_GetData_from_Buffer
100	END INTERFACE PMC_S_GetData_from_Buffer
101
102	! PUBLIC section
103
104	PUBLIC PMC_ServerInit, PMC_S_Set_2D_index_list, PMC_S_GetNextArray, PMC_S_Set_DataArray
105	PUBLIC PMC_S_setInd_and_AllocMem, PMC_S_FillBuffer, PMC_S_GetData_from_Buffer
106
107	CONTAINS
108
109	SUBROUTINE PMC_ServerInit
110	IMPLICIT none
111	INTEGER :: i
112	INTEGER :: j
113	INTEGER :: ClientId
114	INTEGER :: istat
115
116	do i=1,size(PMC_Server_for_Client)-1
117	if(m_model_comm == 0) write(0,*) 'PMC_Server: Initialize client Id',PMC_Server_for_Client(i)
118
119	ClientId = PMC_Server_for_Client(i)
120
121	Clients(ClientId)%model_comm = m_model_comm
122	Clients(ClientId)%inter_comm = m_to_client_comm(ClientId)
123
124	! Get rank and size
125	CALL MPI_Comm_rank (Clients(ClientId)%model_comm, Clients(ClientId)%model_rank, istat);
126	CALL MPI_Comm_size (Clients(ClientId)%model_comm, Clients(ClientId)%model_npes, istat);
127	CALL MPI_Comm_remote_size (Clients(ClientId)%inter_comm, Clients(ClientId)%inter_npes, istat);
128
129	! Intra communicater is used for MPI_Get
130	CALL MPI_Intercomm_merge (Clients(ClientId)%inter_comm, .false., Clients(ClientId)%intra_comm, istat);
131	CALL MPI_Comm_rank (Clients(ClientId)%intra_comm, Clients(ClientId)%intra_rank, istat);
132
133	write(9,*) 'ClientId ',i,ClientId,m_world_rank, Clients(ClientId)%inter_npes
134
135	ALLOCATE (Clients(ClientId)%PEs(Clients(ClientId)%inter_npes))
136
137	do j=1,Clients(ClientId)%inter_npes ! Loop over all client PEs
138	NULLIFY(Clients(ClientId)%PEs(j)%Arrays)
139	end do
140
141	CALL Get_DA_names_from_client (ClientId)
142	end do
143
144	return
145	END SUBROUTINE PMC_ServerInit
146
147	SUBROUTINE PMC_S_Set_2D_index_list (ClientId, index_list)
148	IMPLICIT none
149	INTEGER,INTENT(IN) :: ClientId
150	INTEGER,DIMENSION(:,:),INTENT(INOUT) :: index_list !Index list will be modified in sort, therefore INOUT
151
152	!-- Local variables
153	INTEGER :: ip,is,ie,ian,ic,n
154	INTEGER :: istat
155
156	if(m_model_rank == 0) then
157	CALL PMC_sort (index_list, 6) ! Sort to ascending Server PE
158	is = 1
159
160	do ip=0,m_model_npes-1
161
162	! Split into Server PEs
163	ie = is-1 !there may be no entry for this PE
164	if(is <= size(index_list,2) .and. ie >= 0) then
165	do while ( index_list(6,ie+1) == ip)
166	ie = ie+1
167	if( ie == size(index_list,2)) EXIT
168	end do
169
170	ian = ie-is+1
171	else
172	is = -1
173	ie = -2
174	ian = 0
175	end if
176
177	! Send data to other server PEs
178
179	if(ip == 0) then
180	indClients(ClientId)%NrPoints = ian
181	if(ian > 0) then
182	ALLOCATE (indClients(ClientId)%index_list_2d(6,ian))
183	indClients(ClientId)%index_list_2d(:,1:ian) = index_list(:,is:ie)
184	end if
185	else
186	CALL MPI_Send (ian, 1, MPI_INTEGER, ip, 1000, m_model_comm, istat)
187	if(ian > 0) then
188	CALL MPI_Send (index_list(1,is), 6*ian, MPI_INTEGER, ip, 1001, &
189	m_model_comm, istat)
190	end if
191	end if
192	is = ie+1
193	end do
194	else
195	CALL MPI_Recv (indClients(ClientId)%NrPoints, 1, MPI_INTEGER, 0, 1000, m_model_comm, &
196	MPI_STATUS_IGNORE, istat)
197	ian = indClients(ClientId)%NrPoints
198	if(ian > 0) then
199	ALLOCATE(indClients(ClientId)%index_list_2d(6,ian))
200	CALL MPI_RECV (indClients(ClientId)%index_list_2d, 6*ian, MPI_INTEGER, 0, 1001, &
201	m_model_comm, MPI_STATUS_IGNORE, istat)
202	end if
203	end if
204
205	CALL Set_PE_index_list (ClientId,Clients(ClientId),indClients(ClientId)%index_list_2d,indClients(ClientId)%NrPoints)
206
207	return
208	END SUBROUTINE PMC_S_Set_2D_index_list
209
210	logical function PMC_S_GetNextArray (ClientId, myName,Client_PeIndex)
211	INTEGER,INTENT(IN) :: ClientId
212	CHARACTER(len=*),INTENT(OUT) :: myName
213
214	!-- local variables
215	INTEGER :: MyCoupleIndex
216	logical :: MyLast
217	CHARACTER(len=DA_Namelen) :: loName
218	INTEGER,INTENT(IN),optional :: Client_PeIndex
219
220	loName = ' '
221
222	CALL PMC_G_GetName (clients(ClientId), MyCoupleIndex, loName, MyLast, Client_PeIndex)
223
224	myName = loName
225
226	PMC_S_GetNextArray = .NOT. MyLast ! Return true if valid array
227
228	return
229	END function PMC_S_GetNextArray
230
231	SUBROUTINE PMC_S_Set_DataArray_2d (ClientId, array)
232	IMPLICIT none
233	INTEGER,INTENT(IN) :: ClientId
234	!-- TO_DO: has array always to be of dp-kind, or can wp used here
235	!-- this effects all respective declarations in this file
236	REAL(kind=dp),INTENT(IN),DIMENSION(:,:) :: array
237	!-- local variables
238	INTEGER :: NrDims
239	INTEGER,DIMENSION (4) :: dims
240	INTEGER :: dim_order
241	TYPE(c_ptr) :: array_adr
242
243	dims = 1
244
245	NrDims = 2
246	dims(1) = size(array,1)
247	dims(2) = size(array,2)
248	dim_order = 2
249
250	array_adr = c_loc(array)
251
252	CALL PMC_S_SetArray (ClientId, NrDims, dims, dim_order, array_adr)
253
254	return
255	END SUBROUTINE PMC_S_Set_DataArray_2d
256
257	SUBROUTINE PMC_S_Set_DataArray_3d (ClientId, array, nz_cl, nz)
258	IMPLICIT none
259	INTEGER,INTENT(IN) :: ClientId
260	REAL(kind=dp),INTENT(IN),DIMENSION(:,:,:) :: array
261	INTEGER,INTENT(IN) :: nz_cl
262	INTEGER,INTENT(IN) :: nz
263	!-- local variables
264	INTEGER :: NrDims
265	INTEGER,DIMENSION (4) :: dims
266	INTEGER :: dim_order
267	TYPE(c_ptr) :: array_adr
268
269	dims = 1
270
271	dims = 0
272	NrDims = 3
273	dims(1) = size(array,1)
274	dims(2) = size(array,2)
275	dims(3) = size(array,3)
276	dim_order = 33
277	dims(4) = nz_cl+dims(1)-nz ! works for first dimension 1:nz and 0:nz+1
278
279	array_adr = c_loc(array)
280
281	CALL PMC_S_SetArray (ClientId, NrDims, dims, dim_order, array_adr)
282
283	return
284	END SUBROUTINE PMC_S_Set_DataArray_3d
285
286	SUBROUTINE PMC_S_setInd_and_AllocMem (ClientId)
287	IMPLICIT none
288	INTEGER,INTENT(IN) :: ClientId
289
290	INTEGER :: i, istat, ierr
291	INTEGER :: arlen, myIndex, tag
292	INTEGER :: rCount ! count MPI requests
293	INTEGER(idp) :: bufsize ! Size of MPI data Window
294	TYPE(PeDef),POINTER :: aPE
295	TYPE(ArrayDef),POINTER :: ar
296	CHARACTER(len=DA_Namelen) :: myName
297	INTEGER,DIMENSION(1024) :: req
298	Type(c_ptr) :: base_ptr
299	REAL(kind=wp),DIMENSION(:),POINTER :: base_array
300	INTEGER(KIND=MPI_ADDRESS_KIND) :: WinSize
301
302	myIndex = 1
303	rCount = 0
304	bufsize = 8
305
306	! First stride, Compute size and set index
307
308	do i=1,Clients(ClientId)%inter_npes
309	aPE => Clients(ClientId)%PEs(i)
310	tag = 200
311	do while (PMC_S_GetNextArray ( ClientId, myName,i))
312	ar => aPE%Arrays
313	if(ar%dim_order == 2) then
314	arlen = aPE%NrEle; ! 2D
315	else if(ar%dim_order == 33) then
316	arlen = aPE%NrEle * ar%A_dim(4); ! PALM 3D
317	else
318	arlen = -1
319	end if
320	ar%BufIndex = myIndex
321
322	tag = tag+1
323	rCount = rCount+1
324	CALL MPI_Isend (myIndex, 1, MPI_INTEGER, i-1, tag, Clients(ClientId)%inter_comm, req(rCount),ierr)
325
326	if(rCount == 1024) then ! Maximum of 1024 outstanding requests
327	CALL MPI_Waitall (rCount, req, MPI_STATUSES_IGNORE, ierr)
328	rCount = 0;
329	end if
330
331	myIndex = myIndex+arlen
332	bufsize = bufsize+arlen
333	ar%BufSize = arlen
334
335	end do
336	if(rCount > 0) then ! Wait for all send completed
337	CALL MPI_Waitall (rCount, req, MPI_STATUSES_IGNORE, ierr)
338	end if
339	end do
340
341	! Create RMA (One Sided Communication) window for data buffer
342
343	CALL PMC_Alloc_mem (base_array, bufsize, base_ptr)
344	Clients(ClientId)%TotalBufferSize = bufsize*wp !Total buffer size in Byte
345
346	WinSize = bufsize*wp
347	! write(9,*) 'PMC_S_SetInd_and_Mem ',m_model_rank,Clients(ClientId)%inter_npes,WinSize,bufsize
348	CALL MPI_Win_create (base_array, WinSize, wp, MPI_INFO_NULL, Clients(ClientId)%intra_comm, Clients(ClientId)%BufWin, ierr);
349	CALL MPI_Win_fence (0, Clients(ClientId)%BufWin, ierr); ! Open Window to set data
350	CALL MPI_Barrier(Clients(ClientId)%intra_comm, ierr)
351
352	! Second stride, Set Buffer pointer
353
354	do i=1,Clients(ClientId)%inter_npes
355	aPE => Clients(ClientId)%PEs(i)
356	do while (PMC_S_GetNextArray ( ClientId, myName,i))
357	ar => aPE%Arrays
358	!-- TO_DO: Adressrechnung ueberlegen?
359	ar%SendBuf = c_loc(base_array(ar%BufIndex)) !kk Adressrechnung ueberlegen
360	if(ar%BufIndex+ar%BufSize > bufsize) then
361	!-- TO_DO: can this error really happen, and what can be the reason?
362	write(0,'(a,i4,4i7,1x,a)') 'Buffer too small ',i,ar%BufIndex,ar%BufSize,ar%BufIndex+ar%BufSize,bufsize,trim(myName)
363	CALL MPI_Abort (MPI_COMM_WORLD, istat, ierr)
364	end if
365	end do
366	end do
367
368	return
369	END SUBROUTINE PMC_S_setInd_and_AllocMem
370
371	SUBROUTINE PMC_S_FillBuffer (ClientId, WaitTime)
372	IMPLICIT none
373	INTEGER,INTENT(IN) :: ClientId
374	REAL(kind=dp),INTENT(OUT),optional :: WaitTime
375
376	!-- local variables
377	INTEGER :: ip,ij,istat,ierr
378	INTEGER :: myIndex
379	REAL(kind=dp) :: t1,t2
380	TYPE(PeDef),POINTER :: aPE
381	TYPE(ArrayDef),POINTER :: ar
382	CHARACTER(len=DA_Namelen) :: myName
383	INTEGER,DIMENSION(1) :: buf_shape
384	REAL(kind=wp),POINTER,DIMENSION(:) :: buf
385	REAL(kind=wp),POINTER,DIMENSION(:,:) :: data_2d
386	REAL(kind=wp),POINTER,DIMENSION(:,:,:) :: data_3d
387
388	t1 = PMC_Time()
389	CALL MPI_Barrier(Clients(ClientId)%intra_comm, ierr) ! Wait for buffer empty
390	t2 = PMC_Time()
391	if(present(WaitTime)) WaitTime = t2-t1
392
393	do ip=1,Clients(ClientId)%inter_npes
394	aPE => Clients(ClientId)%PEs(ip)
395	do while (PMC_S_GetNextArray ( ClientId, myName,ip))
396	ar => aPE%Arrays
397	myIndex=1
398	if(ar%dim_order == 2) then
399	buf_shape(1) = aPE%NrEle
400	CALL c_f_pointer(ar%SendBuf, buf, buf_shape)
401	CALL c_f_pointer(ar%data, data_2d, ar%A_dim(1:2))
402	do ij=1,aPE%NrEle
403	buf(myIndex) = data_2d(aPE%locInd(ij)%j,aPE%locInd(ij)%i)
404	myIndex = myIndex+1
405	end do
406	else if(ar%dim_order == 33) then
407	buf_shape(1) = aPE%NrEle*ar%A_dim(4)
408	CALL c_f_pointer(ar%SendBuf, buf, buf_shape)
409	CALL c_f_pointer(ar%data, data_3d, ar%A_dim(1:3))
410	do ij=1,aPE%NrEle
411	buf(myIndex:myIndex+ar%A_dim(4)-1) = data_3d(1:ar%A_dim(4),aPE%locInd(ij)%j,aPE%locInd(ij)%i)
412	myIndex = myIndex+ar%A_dim(4)
413	end do
414	else
415	!-- TO_DO: can this error really happen, and what can be the reason?
416	write(0,*) "Illegal Order of Dimension ",ar%dim_order
417	CALL MPI_Abort (MPI_COMM_WORLD, istat, ierr);
418
419	end if
420	end do
421	end do
422
423	CALL MPI_Barrier(Clients(ClientId)%intra_comm, ierr) ! buffer is full
424
425	return
426	END SUBROUTINE PMC_S_FillBuffer
427
428	SUBROUTINE PMC_S_GetData_from_Buffer (ClientId, WaitTime)
429	IMPLICIT none
430	INTEGER,INTENT(IN) :: ClientId
431	REAL(kind=dp),INTENT(OUT),optional :: WaitTime
432
433	!-- local variables
434	INTEGER :: ip,ij,istat,ierr
435	INTEGER :: myIndex
436	REAL(kind=dp) :: t1,t2
437	TYPE(PeDef),POINTER :: aPE
438	TYPE(ArrayDef),POINTER :: ar
439	CHARACTER(len=DA_Namelen) :: myName
440	INTEGER,DIMENSION(1) :: buf_shape
441	REAL(kind=wp),POINTER,DIMENSION(:) :: buf
442	REAL(kind=wp),POINTER,DIMENSION(:,:) :: data_2d
443	REAL(kind=wp),POINTER,DIMENSION(:,:,:) :: data_3d
444
445	t1 = PMC_Time()
446	CALL MPI_Barrier(Clients(ClientId)%intra_comm, ierr) ! Wait for MPI_Put from client
447	t2 = PMC_Time()
448	if(present(WaitTime)) WaitTime = t2-t1
449
450	do ip=1,Clients(ClientId)%inter_npes
451	aPE => Clients(ClientId)%PEs(ip)
452	do while (PMC_S_GetNextArray ( ClientId, myName,ip))
453	ar => aPE%Arrays
454	myIndex=1
455	if(ar%dim_order == 2) then
456	buf_shape(1) = aPE%NrEle
457	CALL c_f_pointer(ar%SendBuf, buf, buf_shape)
458	CALL c_f_pointer(ar%data, data_2d, ar%A_dim(1:2))
459	do ij=1,aPE%NrEle
460	data_2d(aPE%locInd(ij)%j,aPE%locInd(ij)%i) = buf(myIndex)
461	myIndex = myIndex+1
462	end do
463	else if(ar%dim_order == 33) then
464	buf_shape(1) = aPE%NrEle*ar%A_dim(4)
465	CALL c_f_pointer(ar%SendBuf, buf, buf_shape)
466	CALL c_f_pointer(ar%data, data_3d, ar%A_dim(1:3))
467	do ij=1,aPE%NrEle
468	data_3d(1:ar%A_dim(4),aPE%locInd(ij)%j,aPE%locInd(ij)%i) = buf(myIndex:myIndex+ar%A_dim(4)-1)
469	myIndex = myIndex+ar%A_dim(4)
470	end do
471	else
472	!-- TO_DO: can this error really happen, and what can be the reason?
473	write(0,*) "Illegal Order of Dimension ",ar%dim_order
474	CALL MPI_Abort (MPI_COMM_WORLD, istat, ierr);
475
476	end if
477	end do
478	end do
479
480	CALL MPI_Barrier(Clients(ClientId)%intra_comm, ierr) ! data copy finished, buffer is free for use agein
481
482	return
483	END SUBROUTINE PMC_S_GetData_from_Buffer
484
485	! Private SUBROUTINEs
486
487	SUBROUTINE Get_DA_names_from_client (ClientId)
488	IMPLICIT none
489	INTEGER,INTENT(IN) :: ClientId
490	!-- local variables
491	type(DA_NameDef) :: myName
492
493	! Get Data Array Description and Name from Client
494
495	do
496	CALL PMC_Bcast ( myName%couple_index, 0, comm=m_to_client_comm(ClientId))
497	if(myName%couple_index == -1) EXIT
498	CALL PMC_Bcast ( myName%ServerDesc, 0, comm=m_to_client_comm(ClientId))
499	CALL PMC_Bcast ( myName%NameOnServer, 0, comm=m_to_client_comm(ClientId))
500	CALL PMC_Bcast ( myName%ClientDesc, 0, comm=m_to_client_comm(ClientId))
501	CALL PMC_Bcast ( myName%NameOnClient, 0, comm=m_to_client_comm(ClientId))
502
503	CALL PMC_G_SetName (clients(ClientID), myName%couple_index, myName%NameOnServer )
504	end do
505
506	return
507	END SUBROUTINE Get_DA_names_from_client
508
509	SUBROUTINE PMC_S_SetArray (ClientId, NrDims, dims, dim_order, array_adr)
510	IMPLICIT none
511
512	INTEGER,INTENT(IN) :: ClientId
513	INTEGER,INTENT(IN) :: NrDims
514	INTEGER,INTENT(IN),DIMENSION(:) :: dims
515	INTEGER,INTENT(IN) :: dim_order
516	TYPE(c_ptr),INTENT(IN) :: array_adr
517
518	INTEGER :: i
519	TYPE(PeDef),POINTER :: aPE
520	TYPE(ArrayDef),POINTER :: ar
521	CHARACTER(len=DA_Namelen) :: myName
522
523	! Set Array for Client interPE 0
524
525	do i=1,Clients(ClientId)%inter_npes
526	aPE => Clients(ClientId)%PEs(i)
527	ar => aPE%Arrays
528	ar%NrDims = NrDims
529	ar%A_dim = dims
530	ar%dim_order = dim_order
531	ar%data = array_adr
532	end do
533
534	return
535	END SUBROUTINE PMC_S_SetArray
536
537
538	SUBROUTINE Set_PE_index_list (ClientId, myClient,index_list,NrP)
539	IMPLICIT none
540
541	INTEGER,INTENT(IN) :: ClientId
542	TYPE(ClientDef),INTENT(INOUT) :: myClient
543	INTEGER,INTENT(IN),DIMENSION(:,:) :: index_list
544	INTEGER,INTENT(IN) :: NrP
545
546	!-- local variables
547	INTEGER :: i,j,ind,ierr,i2
548	TYPE(PeDef),POINTER :: aPE
549	INTEGER :: RemPE
550	INTEGER,DIMENSION(myClient%inter_npes) :: RemInd
551	INTEGER,DIMENSION(:),POINTER :: RemIndw
552	INTEGER,DIMENSION(:),POINTER :: RLdef
553	INTEGER(KIND=MPI_ADDRESS_KIND) :: WinSize
554	INTEGER :: indWin,indWin2
555
556	! First, count entries for every remote client PE
557
558	do i=1,myClient%inter_npes
559	aPE => myClient%PEs(i)
560	aPE%NrEle = 0
561	end do
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	aPE% NrEle = aPE% NrEle+1 ! Increment Number of elements for this client Pe
567	end do
568
569	do i=1,myClient%inter_npes
570	aPE => myClient%PEs(i)
571	ALLOCATE(aPE%locInd(aPE%NrEle))
572	end do
573
574	RemInd = 0
575
576	! Second, Create lists
577
578	do j=1,NrP ! loop over number of cells coarse grid
579	RemPE = index_list(5,j)+1 ! Pe number remote PE
580	aPE => myClient%PEs(RemPE)
581	RemInd(RemPE) = RemInd(RemPE)+1
582	ind = RemInd(RemPE)
583	aPE%locInd(ind)%i = index_list(1,j)
584	aPE%locInd(ind)%j = index_list(2,j)
585	end do
586
587	! Prepare Number of Elements for Client PEs
588	CALL PMC_Alloc_mem (RLdef, myClient%inter_npes*2)
589	WinSize = myClient%inter_npesc_sizeof(i)2 ! Number of Client PEs * size of INTEGER (i just arbitrary INTEGER)
590
591	CALL MPI_Win_create (RLdef, WinSize, iwp, MPI_INFO_NULL, myClient%intra_comm, indWin, ierr);
592	CALL MPI_Win_fence (0, indWin, ierr); ! Open Window to set data
593
594	RLdef(1) = 0 ! Index on Remote PE 0
595	RLdef(2) = RemInd(1) ! Number of Elements on Rem PE 0
596
597	do i=2,myClient%inter_npes ! Reserve Buffer for index array
598	i2 = (i-1)*2+1
599	RLdef(i2) = RLdef(i2-2) + RLdef(i2-1)*2 ! Index on Remote PE
600	RLdef(i2+1) = RemInd(i) ! Number of Elements on Remote PE
601	end do
602
603	CALL MPI_Win_fence (0, indWin, ierr); ! Close Window to allow client to access data
604	CALL MPI_Win_fence (0, indWin, ierr); ! Client has retrieved data
605
606	i2 = 2*myClient%inter_npes-1
607	WinSize = (RLdef(i2)+RLdef(i2+1))*2
608	WinSize = max(WinSize,1) ! Make sure, MPI_Alloc_mem works
609
610	CALL PMC_Alloc_mem (RemIndw, int(WinSize))
611
612	CALL MPI_Barrier (m_model_comm, ierr)
613	CALL MPI_Win_create (RemIndw, WinSize*c_sizeof(i), iwp, MPI_INFO_NULL, myClient%intra_comm, indWin2, ierr);
614
615	CALL MPI_Win_fence (0, indWin2, ierr); ! Open Window to set data
616	do j=1,NrP ! this loop creates the 2D index list
617	RemPE = index_list(5,j)+1 ! Pe number remote PE
618	aPE => myClient%PEs(RemPE)
619	i2 = RemPE*2-1
620	ind = RLdef(i2)+1
621	RemIndw(ind) = index_list(3,j)
622	RemIndw(ind+1) = index_list(4,j)
623	RLdef(i2) = RLdef(i2)+2
624	end do
625	CALL MPI_Win_fence (0, indWin2, ierr); !all data set
626
627	CALL MPI_Barrier(myClient%intra_comm, ierr) ! Dont know why, but this barrier is necessary before we can free the windows
628
629	CALL MPI_Win_free(indWin, ierr)
630	CALL MPI_Win_free(indWin2, ierr)
631
632	! Sollte funktionieren, Problem mit MPI implementation
633	! https://www.lrz.de/services/software/parallel/mpi/onesided
634	! CALL MPI_Free_mem (RemIndw, ierr)
635
636	return
637	END SUBROUTINE Set_PE_index_list
638
639	#endif
640	END MODULE pmc_server

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