1 |
C $Header: /u/gcmpack/MITgcm/eesupp/src/gather_2d_rx.template,v 1.5 2009/06/08 03:34:03 jmc Exp $ |
2 |
C $Name: $ |
3 |
|
4 |
#include "PACKAGES_CONFIG.h" |
5 |
#include "CPP_EEOPTIONS.h" |
6 |
|
7 |
CBOP |
8 |
C !ROUTINE: GATHER_2D_RX |
9 |
C !INTERFACE: |
10 |
SUBROUTINE GATHER_2D_RX( |
11 |
O gloBuff, |
12 |
I myField, |
13 |
I xSize, ySize, |
14 |
I useExch2GlobLayOut, |
15 |
I zeroBuff, |
16 |
I myThid ) |
17 |
C !DESCRIPTION: |
18 |
C Gather elements of a global 2-D array from all mpi processes to process 0. |
19 |
C Note: done by Master-Thread ; might need barrier calls before and after |
20 |
C this S/R call. |
21 |
|
22 |
C !USES: |
23 |
IMPLICIT NONE |
24 |
#include "SIZE.h" |
25 |
#include "EEPARAMS.h" |
26 |
#include "EESUPPORT.h" |
27 |
#ifdef ALLOW_EXCH2 |
28 |
#include "W2_EXCH2_SIZE.h" |
29 |
#include "W2_EXCH2_TOPOLOGY.h" |
30 |
#endif /* ALLOW_EXCH2 */ |
31 |
|
32 |
C !INPUT/OUTPUT PARAMETERS: |
33 |
C gloBuff ( _RX ) :: full-domain 2D IO-buffer array (Output) |
34 |
C myField ( _RX ) :: tiled, local (i.e. my Proc. tiles) 2D array (Input) |
35 |
C xSize (integer):: global buffer 1rst dim (x) |
36 |
C ySize (integer):: global buffer 2nd dim (y) |
37 |
C useExch2GlobLayOut:: =T: Use Exch2 global-map layout (only with EXCH2) |
38 |
C zeroBuff (logical):: =T: initialise the buffer to zero before copy |
39 |
C myThid (integer):: my Thread Id number |
40 |
|
41 |
INTEGER xSize, ySize |
42 |
_RX gloBuff(xSize,ySize) |
43 |
_RX myField(1:sNx,1:sNy,nSx,nSy) |
44 |
LOGICAL useExch2GlobLayOut |
45 |
LOGICAL zeroBuff |
46 |
INTEGER myThid |
47 |
CEOP |
48 |
|
49 |
C !LOCAL VARIABLES: |
50 |
INTEGER i,j, bi,bj |
51 |
INTEGER iG, jG |
52 |
INTEGER iBase, jBase |
53 |
#ifdef ALLOW_EXCH2 |
54 |
INTEGER iGjLoc, jGjLoc |
55 |
INTEGER tN |
56 |
#endif /* ALLOW_EXCH2 */ |
57 |
#ifdef ALLOW_USE_MPI |
58 |
INTEGER np0, np |
59 |
_RX temp(1:sNx,1:sNy,nSx,nSy) |
60 |
INTEGER istatus(MPI_STATUS_SIZE), ierr |
61 |
INTEGER lbuff, idest, itag, ready_to_receive |
62 |
#endif /* ALLOW_USE_MPI */ |
63 |
|
64 |
_BEGIN_MASTER( myThid ) |
65 |
|
66 |
IF( myProcId .EQ. 0 ) THEN |
67 |
C-- Process 0 fills-in its local data |
68 |
|
69 |
#ifdef ALLOW_EXCH2 |
70 |
IF ( useExch2GlobLayOut ) THEN |
71 |
C-- If using blank-tiles, buffer will not be completely filled; |
72 |
C safer to reset to zero to avoid unknown values in output file |
73 |
IF ( zeroBuff ) THEN |
74 |
DO j=1,ySize |
75 |
DO i=1,xSize |
76 |
gloBuff(i,j) = 0. |
77 |
ENDDO |
78 |
ENDDO |
79 |
ENDIF |
80 |
|
81 |
DO bj=1,nSy |
82 |
DO bi=1,nSx |
83 |
tN = W2_myTileList(bi,bj) |
84 |
IF ( exch2_mydNx(tN) .GT. xSize ) THEN |
85 |
C- face x-size larger than glob-size : fold it |
86 |
iGjLoc = 0 |
87 |
jGjLoc = exch2_mydNx(tN) / xSize |
88 |
ELSEIF ( exch2_tNy(tN) .GT. ySize ) THEN |
89 |
C- tile y-size larger than glob-size : make a long line |
90 |
iGjLoc = exch2_mydNx(tN) |
91 |
jGjLoc = 0 |
92 |
ELSE |
93 |
C- default (face fit into global-IO-array) |
94 |
iGjLoc = 0 |
95 |
jGjLoc = 1 |
96 |
ENDIF |
97 |
|
98 |
DO j=1,sNy |
99 |
#ifdef TARGET_NEC_SX |
100 |
!cdir novector |
101 |
#endif |
102 |
iG=exch2_txGlobalo(tN)+iGjLoc*(j-1)-1 |
103 |
jG=exch2_tyGlobalo(tN)+jGjLoc*(j-1) |
104 |
DO i=1,sNx |
105 |
gloBuff(iG+i,jG) = myField(i,j,bi,bj) |
106 |
ENDDO |
107 |
ENDDO |
108 |
|
109 |
ENDDO |
110 |
ENDDO |
111 |
|
112 |
ELSE |
113 |
#else /* ALLOW_EXCH2 */ |
114 |
IF (.TRUE.) THEN |
115 |
#endif /* ALLOW_EXCH2 */ |
116 |
|
117 |
iBase = myXGlobalLo-1 |
118 |
jBase = myYGlobalLo-1 |
119 |
|
120 |
DO bj=1,nSy |
121 |
DO bi=1,nSx |
122 |
DO j=1,sNy |
123 |
#ifdef TARGET_NEC_SX |
124 |
!cdir novector |
125 |
#endif |
126 |
iG = iBase+(bi-1)*sNx |
127 |
jG = jBase+(bj-1)*sNy+j |
128 |
DO i=1,sNx |
129 |
gloBuff(iG+i,jG) = myField(i,j,bi,bj) |
130 |
ENDDO |
131 |
ENDDO |
132 |
ENDDO |
133 |
ENDDO |
134 |
|
135 |
C end if-else useExch2GlobLayOut |
136 |
ENDIF |
137 |
|
138 |
C- end if myProcId = 0 |
139 |
ENDIF |
140 |
|
141 |
#ifdef ALLOW_USE_MPI |
142 |
|
143 |
lbuff = sNx*nSx*sNy*nSy |
144 |
idest = 0 |
145 |
itag = 0 |
146 |
ready_to_receive = 0 |
147 |
|
148 |
IF( mpiMyId .EQ. 0 ) THEN |
149 |
|
150 |
C-- Process 0 polls and receives data from each process in turn |
151 |
DO np = 2, numberOfProcs |
152 |
np0 = np - 1 |
153 |
#ifndef DISABLE_MPI_READY_TO_RECEIVE |
154 |
CALL MPI_SEND (ready_to_receive, 1, MPI_INTEGER, |
155 |
& np0, itag, MPI_COMM_MODEL, ierr) |
156 |
#endif |
157 |
CALL MPI_RECV (temp, lbuff, _MPI_TYPE_RX, |
158 |
& np0, itag, MPI_COMM_MODEL, istatus, ierr) |
159 |
|
160 |
C-- Process 0 gathers the local arrays into the global buffer. |
161 |
#ifdef ALLOW_EXCH2 |
162 |
IF ( useExch2GlobLayOut ) THEN |
163 |
|
164 |
DO bj=1,nSy |
165 |
DO bi=1,nSx |
166 |
tN = W2_procTileList(bi,bj,np) |
167 |
IF ( exch2_mydNx(tN) .GT. xSize ) THEN |
168 |
C- face x-size larger than glob-size : fold it |
169 |
iGjLoc = 0 |
170 |
jGjLoc = exch2_mydNx(tN) / xSize |
171 |
ELSEIF ( exch2_tNy(tN) .GT. ySize ) THEN |
172 |
C- tile y-size larger than glob-size : make a long line |
173 |
iGjLoc = exch2_mydNx(tN) |
174 |
jGjLoc = 0 |
175 |
ELSE |
176 |
C- default (face fit into global-IO-array) |
177 |
iGjLoc = 0 |
178 |
jGjLoc = 1 |
179 |
ENDIF |
180 |
|
181 |
DO j=1,sNy |
182 |
#ifdef TARGET_NEC_SX |
183 |
!cdir novector |
184 |
#endif |
185 |
iG=exch2_txGlobalo(tN)+iGjLoc*(j-1)-1 |
186 |
jG=exch2_tyGlobalo(tN)+jGjLoc*(j-1) |
187 |
DO i=1,sNx |
188 |
gloBuff(iG+i,jG) = temp(i,j,bi,bj) |
189 |
ENDDO |
190 |
ENDDO |
191 |
|
192 |
ENDDO |
193 |
ENDDO |
194 |
|
195 |
ELSE |
196 |
#else /* ALLOW_EXCH2 */ |
197 |
IF (.TRUE.) THEN |
198 |
#endif /* ALLOW_EXCH2 */ |
199 |
|
200 |
iBase = mpi_myXGlobalLo(np)-1 |
201 |
jBase = mpi_myYGlobalLo(np)-1 |
202 |
|
203 |
DO bj=1,nSy |
204 |
DO bi=1,nSx |
205 |
DO j=1,sNy |
206 |
#ifdef TARGET_NEC_SX |
207 |
!cdir novector |
208 |
#endif |
209 |
iG = iBase+(bi-1)*sNx |
210 |
jG = jBase+(bj-1)*sNy+j |
211 |
DO i=1,sNx |
212 |
gloBuff(iG+i,jG) = temp(i,j,bi,bj) |
213 |
ENDDO |
214 |
ENDDO |
215 |
ENDDO |
216 |
ENDDO |
217 |
|
218 |
C end if-else useExch2GlobLayOut |
219 |
ENDIF |
220 |
|
221 |
C- end loop on np |
222 |
ENDDO |
223 |
|
224 |
ELSE |
225 |
|
226 |
C-- All proceses except 0 wait to be polled then send local array |
227 |
#ifndef DISABLE_MPI_READY_TO_RECEIVE |
228 |
CALL MPI_RECV (ready_to_receive, 1, MPI_INTEGER, |
229 |
& idest, itag, MPI_COMM_MODEL, istatus, ierr) |
230 |
#endif |
231 |
CALL MPI_SEND (myField, lbuff, _MPI_TYPE_RX, |
232 |
& idest, itag, MPI_COMM_MODEL, ierr) |
233 |
|
234 |
ENDIF |
235 |
|
236 |
#endif /* ALLOW_USE_MPI */ |
237 |
|
238 |
_END_MASTER( myThid ) |
239 |
|
240 |
RETURN |
241 |
END |