-
Notifications
You must be signed in to change notification settings - Fork 0
/
m2hx_hxir.f90
299 lines (237 loc) · 11.8 KB
/
m2hx_hxir.f90
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
!*robodoc*f* cgca_m2hx/m2hx_hxir
! NAME
! m2hx_hxir
! SYNOPSIS
!$Id: m2hx_hxir.f90 423 2017-06-25 20:54:50Z mexas $
submodule ( cgca_m2hx ) m2hx_hxir
! DESCRIPTION
! Submodule of cgca_m2hx with an internal halo exchange routine
! with random sequence of remote operations.
! AUTHOR
! Anton Shterenlikht
! COPYRIGHT
! See LICENCE
! CONTAINS
! cgca_hxir
! USES
! Variables and parameters from the parent module cgca_m2hx.
! USED BY
! The parent module cgca_m2hx.
! SOURCE
implicit none
contains
!*roboend*
!*robodoc*s* cgca_m2hx/cgca_hxir
! NAME
! cgca_hxir
! SYNOPSIS
module procedure cgca_hxir
! INPUT
! See the parent module
! OUTPUT
! See INPUT
! SIDE EFFECTS
! coarray is changed
! DESCRIPTION
! This routine does internal halo exchange in random order.
! The routine exchanges halos on *all* cell state types.
! This is an overkill, as it is likely that only one cell
! state type needs to be halo exchanged at a time.
! However, it makes for an easier code, and there is virtually
! no performance penalty, so we do it this way.
! NOTES
! All images must call this routine!
! USES
! All data objects from parent module cgca_m2hx by host association.
! USED BY
! module cgca_m2hx
! SOURCE
! Number of groups of remote calls
! This parameter is used to randomoise the order of remote calls
integer, parameter :: ngroups=3
integer :: &
lbv(4) , & ! lower bounds of the "virtual" coarray
ubv(4) , & ! upper bounds of the "virtual" coarray
lbr(4) , & ! lower bounds of the "real" coarray, lbv+1
ubr(4) , & ! upper bounds of the "real" coarray, ubv-1
lcob(3) , & ! lower cobounds of the coarray
ucob(3) , & ! upper cobounds of the coarray
imgpos(3) , & ! position of the image in a coarray grid
imgpos1mns1 , & ! positions of the neighbouring images
imgpos1pls1 , & ! along 3 directions
imgpos2mns1 , & !
imgpos2pls1 , & !
imgpos3mns1 , & !
imgpos3pls1 , & !
istart , & ! starting group of remote calls
i, idx ! loop indices
real :: rnd
! check for allocated
if ( .not. allocated( coarray ) ) &
error stop "ERROR: m2hx_hxir/cgca_hxir: coarray is not allocated"
lbv = lbound( coarray )
ubv = ubound( coarray )
lbr = lbv + 1
ubr = ubv - 1
lcob = lcobound( coarray )
ucob = ucobound( coarray )
imgpos = this_image( coarray )
imgpos1mns1 = imgpos(1) - 1
imgpos1pls1 = imgpos(1) + 1
imgpos2mns1 = imgpos(2) - 1
imgpos2pls1 = imgpos(2) + 1
imgpos3mns1 = imgpos(3) - 1
imgpos3pls1 = imgpos(3) + 1
! Make sure only the virtual (halo) arrays are assigned to.
! The real array values must never appear on the left
! hand side of the assignment expressions.
! The halo exchange process is copying real array values into halos.
! There must not ever be copying real values
! to real, or halo to halo, or halo to real.
! Also, only local array must appear on the left.
! We are assigning values to the local array's virtual
! (halo) cells using values from real cells from arrays
! in other images.
! I split all transfers into several groups.
! The starting group is chosen at random.
call random_number( rnd ) ! [ 0 .. 1 )
istart = int( rnd * ngroups ) + 1 ! [ 1 .. ngroups ]
!rcalls: do i = istart , istart + ngroups - 1
rcalls: do i = 1,1
! Remote call group index
idx = i
if ( idx .gt. ngroups ) idx = idx - ngroups
groups: if ( idx .eq. 1 ) then
! 1st group of remote calls
! exchange 2D halos in direction 1
if ( imgpos(1) .ne. lcob(1) ) &
coarray( lbv(1) , lbr(2) : ubr(2) , lbr(3) : ubr(3) , : ) = &
coarray( ubr(1) , lbr(2) : ubr(2) , lbr(3) : ubr(3) , : ) &
[ imgpos1mns1 , imgpos(2) , imgpos(3) ]
if ( imgpos(1) .ne. ucob(1) ) &
coarray( ubv(1) , lbr(2) : ubr(2) , lbr(3) : ubr(3) , : ) = &
coarray( lbr(1) , lbr(2) : ubr(2) , lbr(3) : ubr(3) , : ) &
[ imgpos1pls1 , imgpos(2) , imgpos(3) ]
! exchange 1D halos parallel to direction 1
if (imgpos(2) .ne. lcob(2) .and. imgpos(3) .ne. lcob(3)) &
coarray(lbr(1):ubr(1),lbv(2),lbv(3),:) = &
coarray(lbr(1):ubr(1),ubr(2),ubr(3),:) &
[imgpos(1),imgpos2mns1,imgpos3mns1]
if (imgpos(2) .ne. ucob(2) .and. imgpos(3) .ne. lcob(3)) &
coarray(lbr(1):ubr(1),ubv(2),lbv(3),:) = &
coarray(lbr(1):ubr(1),lbr(2),ubr(3),:) &
[imgpos(1),imgpos2pls1,imgpos3mns1]
if (imgpos(2) .ne. ucob(2) .and. imgpos(3) .ne. ucob(3)) &
coarray(lbr(1):ubr(1),ubv(2),ubv(3),:) = &
coarray(lbr(1):ubr(1),lbr(2),lbr(3),:) &
[imgpos(1),imgpos2pls1,imgpos3pls1]
if (imgpos(2) .ne. lcob(2) .and. imgpos(3) .ne. ucob(3)) &
coarray(lbr(1):ubr(1),lbv(2),ubv(3),:) = &
coarray(lbr(1):ubr(1),ubr(2),lbr(3),:) &
[imgpos(1),imgpos2mns1,imgpos3pls1]
! else if ( idx .eq. 2 ) then
! 2nd group of remote calls
! exchange 2D halos in direction 2
if ( imgpos(2) .ne. lcob(2) ) &
coarray( lbr(1) : ubr(1) , lbv(2) , lbr(3) : ubr(3) , : ) = &
coarray( lbr(1) : ubr(1) , ubr(2) , lbr(3) : ubr(3) , : ) &
[ imgpos(1) , imgpos2mns1 , imgpos(3) ]
if ( imgpos(2) .ne. ucob(2) ) &
coarray( lbr(1) : ubr(1) , ubv(2) , lbr(3) : ubr(3) , : ) = &
coarray( lbr(1) : ubr(1) , lbr(2) , lbr(3) : ubr(3) , : ) &
[ imgpos(1) , imgpos2pls1 , imgpos(3) ]
! exchange 1D halos parallel to direction 2
if (imgpos(1) .ne. lcob(1) .and. imgpos(3) .ne. lcob(3)) &
coarray(lbv(1),lbr(2):ubr(2),lbv(3),:) = &
coarray(ubr(1),lbr(2):ubr(2),ubr(3),:) &
[imgpos1mns1,imgpos(2),imgpos3mns1]
if (imgpos(1) .ne. ucob(1) .and. imgpos(3) .ne. lcob(3)) &
coarray(ubv(1),lbr(2):ubr(2),lbv(3),:) = &
coarray(lbr(1),lbr(2):ubr(2),ubr(3),:) &
[imgpos1pls1,imgpos(2),imgpos3mns1]
if (imgpos(1) .ne. ucob(1) .and. imgpos(3) .ne. ucob(3)) &
coarray(ubv(1),lbr(2):ubr(2),ubv(3),:) = &
coarray(lbr(1),lbr(2):ubr(2),lbr(3),:) &
[imgpos1pls1,imgpos(2),imgpos3pls1]
if (imgpos(1) .ne. lcob(1) .and. imgpos(3) .ne. ucob(3)) &
coarray(lbv(1),lbr(2):ubr(2),ubv(3),:) = &
coarray(ubr(1),lbr(2):ubr(2),lbr(3),:) &
[imgpos1mns1,imgpos(2),imgpos3pls1]
! else if ( idx .eq. 3 ) then
! 3rd group of remote calls
! exchange 2D halos in direction 3
if ( imgpos(3) .ne. lcob(3) ) &
coarray( lbr(1) : ubr(1) , lbr(2) : ubr(2) , lbv(3) , : ) = &
coarray( lbr(1) : ubr(1) , lbr(2) : ubr(2) , ubr(3) , : ) &
[ imgpos(1) , imgpos(2) , imgpos3mns1 ]
if ( imgpos(3) .ne. ucob(3) ) &
coarray( lbr(1) : ubr(1) , lbr(2) : ubr(2) , ubv(3) , : ) = &
coarray( lbr(1) : ubr(1) , lbr(2) : ubr(2) , lbr(3) , : ) &
[ imgpos(1) , imgpos(2) , imgpos3pls1 ]
! exchange 1D halos parallel to direction 3
if ( imgpos(1) .ne. lcob(1) .and. imgpos(2) .ne. lcob(2) ) &
coarray( lbv(1) , lbv(2) , lbr(3) : ubr(3) , : ) = &
coarray( ubr(1) , ubr(2) , lbr(3) : ubr(3) , : ) &
[ imgpos1mns1 , imgpos2mns1 , imgpos(3) ]
if (imgpos(1) .ne. ucob(1) .and. imgpos(2) .ne. lcob(2)) &
coarray(ubv(1),lbv(2),lbr(3):ubr(3),:) = &
coarray(lbr(1),ubr(2),lbr(3):ubr(3),:) &
[imgpos1pls1,imgpos2mns1,imgpos(3)]
if (imgpos(1) .ne. ucob(1) .and. imgpos(2) .ne. ucob(2)) &
coarray(ubv(1),ubv(2),lbr(3):ubr(3),:) = &
coarray(lbr(1),lbr(2),lbr(3):ubr(3),:) &
[imgpos1pls1,imgpos2pls1,imgpos(3)]
if (imgpos(1) .ne. lcob(1) .and. imgpos(2) .ne. ucob(2)) &
coarray(lbv(1),ubv(2),lbr(3):ubr(3),:) = &
coarray(ubr(1),lbr(2),lbr(3):ubr(3),:) &
[imgpos1mns1,imgpos2pls1,imgpos(3)]
! exchange 8 scalar halos
! first 4 statements are for the lower bound virtual
! corners of the coarray along dimension 3.
if ((imgpos(1) .ne. lcob(1)) .and. (imgpos(2) .ne. lcob(2)) .and. &
(imgpos(3) .ne. lcob(3))) &
coarray( lbv(1), lbv(2), lbv(3), : ) = &
coarray( ubr(1), ubr(2), ubr(3), : ) &
[ imgpos1mns1, imgpos2mns1, imgpos3mns1 ]
if ((imgpos(1) .ne. ucob(1)) .and. (imgpos(2) .ne. lcob(2)) .and. &
(imgpos(3) .ne. lcob(3))) &
coarray( ubv(1), lbv(2), lbv(3), : ) = &
coarray( lbr(1), ubr(2), ubr(3), : ) &
[ imgpos1pls1, imgpos2mns1, imgpos3mns1 ]
if ((imgpos(1) .ne. lcob(1)) .and. (imgpos(2) .ne. ucob(2)) .and. &
(imgpos(3) .ne. lcob(3))) &
coarray( lbv(1), ubv(2), lbv(3), : ) = &
coarray( ubr(1), lbr(2), ubr(3), : ) &
[ imgpos1mns1, imgpos2pls1, imgpos3mns1 ]
if ((imgpos(1) .ne. ucob(1)) .and. (imgpos(2) .ne. ucob(2)) .and. &
(imgpos(3) .ne. lcob(3))) &
coarray( ubv(1), ubv(2), lbv(3), : ) = &
coarray( lbr(1), lbr(2), ubr(3), : ) &
[ imgpos1pls1, imgpos2pls1, imgpos3mns1 ]
! these 4 statements are for the uppper bound virtual
! corners of the coarray along dimension 3.
if ((imgpos(1) .ne. lcob(1)) .and. (imgpos(2) .ne. lcob(2)) .and. &
(imgpos(3) .ne. ucob(3))) &
coarray (lbv(1), lbv(2), ubv(3), : ) = &
coarray (ubr(1), ubr(2), lbr(3), : ) &
[ imgpos1mns1, imgpos2mns1, imgpos3pls1 ]
if ((imgpos(1) .ne. ucob(1)) .and. (imgpos(2) .ne. lcob(2)) .and. &
(imgpos(3) .ne. ucob(3))) &
coarray (ubv(1), lbv(2), ubv(3), : ) = &
coarray (lbr(1), ubr(2), lbr(3), : ) &
[ imgpos1pls1, imgpos2mns1, imgpos3pls1 ]
if ((imgpos(1) .ne. lcob(1)) .and. (imgpos(2) .ne. ucob(2)) .and. &
(imgpos(3) .ne. ucob(3))) &
coarray (lbv(1), ubv(2), ubv(3), : ) = &
coarray (ubr(1), lbr(2), lbr(3), : ) &
[ imgpos1mns1, imgpos2pls1, imgpos3pls1 ]
if ((imgpos(1) .ne. ucob(1)) .and. (imgpos(2) .ne. ucob(2)) .and. &
(imgpos(3) .ne. ucob(3))) &
coarray (ubv(1), ubv(2), ubv(3), : ) = &
coarray (lbr(1), lbr(2), lbr(3), : ) &
[ imgpos1pls1, imgpos2pls1, imgpos3pls1 ]
end if groups
end do rcalls
end procedure cgca_hxir
!*roboend*
end submodule m2hx_hxir