1 |
C |
2 |
C $Header: /u/u3/gcmpack/MITgcm/pkg/grdchk/grdchk_main.F,v 1.9 2003/10/02 21:30:22 heimbach Exp $ |
3 |
C $Name: $ |
4 |
|
5 |
#include "AD_CONFIG.h" |
6 |
#include "CPP_OPTIONS.h" |
7 |
|
8 |
CBOI |
9 |
C |
10 |
C !TITLE: GRADIENT CHECK |
11 |
C !AUTHORS: mitgcm developers ( support@mitgcm.org ) |
12 |
C !AFFILIATION: Massachussetts Institute of Technology |
13 |
C !DATE: |
14 |
C !INTRODUCTION: gradient check package |
15 |
c \bv |
16 |
c Compare the gradients calculated by the adjoint model with |
17 |
c finite difference approximations. |
18 |
c |
19 |
C !CALLING SEQUENCE: |
20 |
c |
21 |
c the_model_main |
22 |
c | |
23 |
c |-- ctrl_unpack |
24 |
c |-- adthe_main_loop - unperturbed cost function and |
25 |
c |-- ctrl_pack adjoint gradient are computed here |
26 |
c | |
27 |
c |-- grdchk_main |
28 |
c | |
29 |
c |-- grdchk_init |
30 |
c |-- do icomp=... - loop over control vector elements |
31 |
c | |
32 |
c |-- grdchk_loc - determine location of icomp on grid |
33 |
c | |
34 |
c |-- grdchk_getxx - get control vector component from file |
35 |
c | perturb it and write back to file |
36 |
c |-- grdchk_getadxx - get gradient component calculated |
37 |
c | via adjoint |
38 |
c |-- the_main_loop - forward run and cost evaluation |
39 |
c | with perturbed control vector element |
40 |
c |-- calculate ratio of adj. vs. finite difference gradient |
41 |
c | |
42 |
c |-- grdchk_setxx - Reset control vector element |
43 |
c | |
44 |
c |-- grdchk_print - print results |
45 |
c \ev |
46 |
CEOI |
47 |
|
48 |
CBOP |
49 |
C !ROUTINE: grdchk_main |
50 |
C !INTERFACE: |
51 |
subroutine grdchk_main( mythid ) |
52 |
|
53 |
C !DESCRIPTION: \bv |
54 |
c ================================================================== |
55 |
c SUBROUTINE grdchk_main |
56 |
c ================================================================== |
57 |
c o Compare the gradients calculated by the adjoint model with |
58 |
c finite difference approximations. |
59 |
c started: Christian Eckert eckert@mit.edu 24-Feb-2000 |
60 |
c continued&finished: heimbach@mit.edu: 13-Jun-2001 |
61 |
c changed: mlosch@ocean.mit.edu: 09-May-2002 |
62 |
c - added centered difference vs. 1-sided difference option |
63 |
c - improved output format for readability |
64 |
c - added control variable hFacC |
65 |
c heimbach@mit.edu 24-Feb-2003 |
66 |
c - added tangent linear gradient checks |
67 |
c - fixes for multiproc. gradient checks |
68 |
c - added more control variables |
69 |
c |
70 |
c ================================================================== |
71 |
c SUBROUTINE grdchk_main |
72 |
c ================================================================== |
73 |
C \ev |
74 |
|
75 |
C !USES: |
76 |
implicit none |
77 |
|
78 |
c == global variables == |
79 |
#include "SIZE.h" |
80 |
#include "EEPARAMS.h" |
81 |
#include "PARAMS.h" |
82 |
#include "grdchk.h" |
83 |
#include "cost.h" |
84 |
#ifdef ALLOW_TANGENTLINEAR_RUN |
85 |
#include "g_cost.h" |
86 |
#endif |
87 |
|
88 |
C !INPUT/OUTPUT PARAMETERS: |
89 |
c == routine arguments == |
90 |
integer mythid |
91 |
|
92 |
#ifdef ALLOW_GRADIENT_CHECK |
93 |
C !LOCAL VARIABLES: |
94 |
c == local variables == |
95 |
integer myiter |
96 |
_RL mytime |
97 |
integer bi, itlo, ithi |
98 |
integer bj, jtlo, jthi |
99 |
integer i, imin, imax |
100 |
integer j, jmin, jmax |
101 |
integer k |
102 |
|
103 |
integer icomp |
104 |
integer ichknum |
105 |
integer icvrec |
106 |
integer jtile |
107 |
integer itile |
108 |
integer layer |
109 |
integer obcspos |
110 |
integer itilepos |
111 |
integer jtilepos |
112 |
integer itest |
113 |
integer ierr |
114 |
integer ierr_grdchk |
115 |
_RL gfd |
116 |
_RL fcref |
117 |
_RL fcpertplus, fcpertminus |
118 |
_RL ratio_ad |
119 |
_RL ratio_ftl |
120 |
_RL xxmemo_ref |
121 |
_RL xxmemo_pert |
122 |
_RL adxxmemo |
123 |
_RL ftlxxmemo |
124 |
_RL localEps |
125 |
_RL grdchk_epsfac |
126 |
|
127 |
_RL tmpplot1(1-olx:snx+olx,1-oly:sny+oly,nr,nsx,nsy) |
128 |
_RL tmpplot2(1-olx:snx+olx,1-oly:sny+oly,nr,nsx,nsy) |
129 |
_RL tmpplot3(1-olx:snx+olx,1-oly:sny+oly,nr,nsx,nsy) |
130 |
|
131 |
c == end of interface == |
132 |
CEOP |
133 |
|
134 |
c-- Set the loop ranges. |
135 |
jtlo = mybylo(mythid) |
136 |
jthi = mybyhi(mythid) |
137 |
itlo = mybxlo(mythid) |
138 |
ithi = mybxhi(mythid) |
139 |
jmin = 1 |
140 |
jmax = sny |
141 |
imin = 1 |
142 |
imax = snx |
143 |
|
144 |
c-- initialise variables |
145 |
call grdchk_init( mythid ) |
146 |
|
147 |
c-- Compute the adjoint models' gradients. |
148 |
c-- Compute the unperturbed cost function. |
149 |
cph Gradient via adjoint has already been computed, |
150 |
cph and so has unperturbed cost function, |
151 |
cph assuming all xx_ fields are initialised to zero. |
152 |
|
153 |
ierr_grdchk = 0 |
154 |
cphadmtlm( |
155 |
fcref = fc |
156 |
cphadmtlm fcref = objf_state_final(45,4,1,1) |
157 |
cphadmtlm) |
158 |
|
159 |
print *, 'ph-check fcref = ', fcref |
160 |
|
161 |
do bj = jtlo, jthi |
162 |
do bi = itlo, ithi |
163 |
do k = 1, nr |
164 |
do j = jmin, jmax |
165 |
do i = imin, imax |
166 |
tmpplot1(i,j,k,bi,bj) = 0. _d 0 |
167 |
tmpplot2(i,j,k,bi,bj) = 0. _d 0 |
168 |
tmpplot3(i,j,k,bi,bj) = 0. _d 0 |
169 |
end do |
170 |
end do |
171 |
end do |
172 |
end do |
173 |
end do |
174 |
|
175 |
if ( useCentralDiff ) then |
176 |
grdchk_epsfac = 2. _d 0 |
177 |
else |
178 |
grdchk_epsfac = 1. _d 0 |
179 |
end if |
180 |
|
181 |
print *, 'ph-grd 3 -------------------------------' |
182 |
print ('(2a)'), |
183 |
& ' ph-grd 3 proc # i j k fc ref', |
184 |
& ' fc + eps fc - eps' |
185 |
#ifdef ALLOW_TANGENTLINEAR_RUN |
186 |
print ('(2a)'), |
187 |
& ' ph-grd 3 proc # i j k tlm grad', |
188 |
& ' fd grad 1 - fd/tlm' |
189 |
#else |
190 |
print ('(2a)'), |
191 |
& ' ph-grd 3 proc # i j k adj grad', |
192 |
& ' fd grad 1 - fd/adj' |
193 |
#endif |
194 |
|
195 |
c-- Compute the finite difference approximations. |
196 |
c-- Cycle through all processes doing NINT(nend-nbeg+1)/nstep |
197 |
c-- gradient checks. |
198 |
|
199 |
do icomp = nbeg, nend, nstep |
200 |
|
201 |
ichknum = (icomp - nbeg)/nstep + 1 |
202 |
|
203 |
if (ichknum .le. maxgrdchecks ) then |
204 |
|
205 |
c-- Determine the location of icomp on the grid. |
206 |
if ( myProcId .EQ. grdchkwhichproc ) then |
207 |
call grdchk_loc( icomp, ichknum, |
208 |
& icvrec, itile, jtile, layer, obcspos, |
209 |
& itilepos, jtilepos, itest, ierr, |
210 |
& mythid ) |
211 |
endif |
212 |
_BARRIER |
213 |
|
214 |
c****************************************************** |
215 |
c-- (A): get gradient component calculated via adjoint |
216 |
c****************************************************** |
217 |
|
218 |
c-- get gradient component calculated via adjoint |
219 |
if ( myProcId .EQ. grdchkwhichproc .AND. |
220 |
& ierr .EQ. 0 ) then |
221 |
call grdchk_getadxx( icvrec, |
222 |
& itile, jtile, layer, |
223 |
& itilepos, jtilepos, |
224 |
& adxxmemo, mythid ) |
225 |
endif |
226 |
_BARRIER |
227 |
|
228 |
#ifdef ALLOW_TANGENTLINEAR_RUN |
229 |
c****************************************************** |
230 |
c-- (B): Get gradient component g_fc from tangent linear run: |
231 |
c****************************************************** |
232 |
c-- |
233 |
c-- 1. perturb control vector component: xx(i)=1. |
234 |
|
235 |
if ( myProcId .EQ. grdchkwhichproc .AND. |
236 |
& ierr .EQ. 0 ) then |
237 |
localEps = 1. _d 0 |
238 |
call grdchk_getxx( icvrec, TANGENT_SIMULATION, |
239 |
& itile, jtile, layer, |
240 |
& itilepos, jtilepos, |
241 |
& xxmemo_ref, xxmemo_pert, localEps, |
242 |
& mythid ) |
243 |
endif |
244 |
_BARRIER |
245 |
|
246 |
c-- |
247 |
c-- 2. perform tangent linear run |
248 |
mytime = starttime |
249 |
myiter = niter0 |
250 |
cphadmtlm( |
251 |
g_fc = 0. |
252 |
cphadmtlm do j=1,sny |
253 |
cphadmtlm do i=1,snx |
254 |
cphadmtlm g_objf_state_final(i,j,1,1) = 0. |
255 |
cphadmtlm enddo |
256 |
cphadmtlm enddo |
257 |
cphadmtlm) |
258 |
call g_the_main_loop( mytime, myiter, mythid ) |
259 |
cphadmtlm( |
260 |
ftlxxmemo = g_fc |
261 |
cphadmtlm ftlxxmemo = g_objf_state_final(45,4,1,1) |
262 |
cphadmtlm) |
263 |
_BARRIER |
264 |
c-- |
265 |
c-- 3. reset control vector |
266 |
if ( myProcId .EQ. grdchkwhichproc .AND. |
267 |
& ierr .EQ. 0 ) then |
268 |
call grdchk_setxx( icvrec, TANGENT_SIMULATION, |
269 |
& itile, jtile, layer, |
270 |
& itilepos, jtilepos, |
271 |
& xxmemo_ref, mythid ) |
272 |
endif |
273 |
_BARRIER |
274 |
|
275 |
#endif /* ALLOW_TANGENTLINEAR_RUN */ |
276 |
|
277 |
|
278 |
c****************************************************** |
279 |
c-- (C): Get gradient via finite difference perturbation |
280 |
c****************************************************** |
281 |
|
282 |
c-- get control vector component from file |
283 |
c-- perturb it and write back to file |
284 |
c-- positive perturbation |
285 |
localEps = abs(grdchk_eps) |
286 |
if ( myProcId .EQ. grdchkwhichproc .AND. |
287 |
& ierr .EQ. 0 ) then |
288 |
call grdchk_getxx( icvrec, FORWARD_SIMULATION, |
289 |
& itile, jtile, layer, |
290 |
& itilepos, jtilepos, |
291 |
& xxmemo_ref, xxmemo_pert, localEps, |
292 |
& mythid ) |
293 |
endif |
294 |
_BARRIER |
295 |
|
296 |
c-- forward run with perturbed control vector |
297 |
mytime = starttime |
298 |
myiter = niter0 |
299 |
call the_main_loop( mytime, myiter, mythid ) |
300 |
cphadmtlm( |
301 |
fcpertplus = fc |
302 |
cphadmtlm fcpertplus = objf_state_final(45,4,1,1) |
303 |
cphadmtlm) |
304 |
_BARRIER |
305 |
|
306 |
c-- Reset control vector. |
307 |
if ( myProcId .EQ. grdchkwhichproc .AND. |
308 |
& ierr .EQ. 0 ) then |
309 |
call grdchk_setxx( icvrec, FORWARD_SIMULATION, |
310 |
& itile, jtile, layer, |
311 |
& itilepos, jtilepos, |
312 |
& xxmemo_ref, mythid ) |
313 |
endif |
314 |
_BARRIER |
315 |
|
316 |
fcpertminus = fcref |
317 |
|
318 |
if ( useCentralDiff ) then |
319 |
|
320 |
c-- get control vector component from file |
321 |
c-- perturb it and write back to file |
322 |
c-- repeat the proceedure for a negative perturbation |
323 |
if ( myProcId .EQ. grdchkwhichproc .AND. |
324 |
& ierr .EQ. 0 ) then |
325 |
localEps = - abs(grdchk_eps) |
326 |
call grdchk_getxx( icvrec, FORWARD_SIMULATION, |
327 |
& itile, jtile, layer, |
328 |
& itilepos, jtilepos, |
329 |
& xxmemo_ref, xxmemo_pert, localEps, |
330 |
& mythid ) |
331 |
endif |
332 |
_BARRIER |
333 |
|
334 |
c-- forward run with perturbed control vector |
335 |
mytime = starttime |
336 |
myiter = niter0 |
337 |
call the_main_loop( mytime, myiter, mythid ) |
338 |
_BARRIER |
339 |
fcpertminus = fc |
340 |
|
341 |
c-- Reset control vector. |
342 |
if ( myProcId .EQ. grdchkwhichproc .AND. |
343 |
& ierr .EQ. 0 ) then |
344 |
call grdchk_setxx( icvrec, FORWARD_SIMULATION, |
345 |
& itile, jtile, layer, |
346 |
& itilepos, jtilepos, |
347 |
& xxmemo_ref, mythid ) |
348 |
endif |
349 |
_BARRIER |
350 |
|
351 |
c-- end of if useCentralDiff ... |
352 |
end if |
353 |
|
354 |
c****************************************************** |
355 |
c-- (D): calculate relative differences between gradients |
356 |
c****************************************************** |
357 |
|
358 |
if ( myProcId .EQ. grdchkwhichproc .AND. |
359 |
& ierr .EQ. 0 ) then |
360 |
|
361 |
if ( grdchk_eps .eq. 0. ) then |
362 |
gfd = (fcpertplus-fcpertminus) |
363 |
else |
364 |
gfd = (fcpertplus-fcpertminus) |
365 |
& /(grdchk_epsfac*grdchk_eps) |
366 |
endif |
367 |
|
368 |
if ( adxxmemo .eq. 0. ) then |
369 |
ratio_ad = abs( adxxmemo - gfd ) |
370 |
else |
371 |
ratio_ad = 1. - gfd/adxxmemo |
372 |
endif |
373 |
|
374 |
if ( ftlxxmemo .eq. 0. ) then |
375 |
ratio_ftl = abs( ftlxxmemo - gfd ) |
376 |
else |
377 |
ratio_ftl = 1. - gfd/ftlxxmemo |
378 |
endif |
379 |
|
380 |
tmpplot1(itilepos,jtilepos,layer,itile,jtile) |
381 |
& = gfd |
382 |
tmpplot2(itilepos,jtilepos,layer,itile,jtile) |
383 |
& = ratio_ad |
384 |
tmpplot3(itilepos,jtilepos,layer,itile,jtile) |
385 |
& = ratio_ftl |
386 |
|
387 |
fcrmem ( ichknum ) = fcref |
388 |
fcppmem ( ichknum ) = fcpertplus |
389 |
fcpmmem ( ichknum ) = fcpertminus |
390 |
xxmemref ( ichknum ) = xxmemo_ref |
391 |
xxmempert ( ichknum ) = xxmemo_pert |
392 |
gfdmem ( ichknum ) = gfd |
393 |
adxxmem ( ichknum ) = adxxmemo |
394 |
ftlxxmem ( ichknum ) = ftlxxmemo |
395 |
ratioadmem ( ichknum ) = ratio_ad |
396 |
ratioftlmem ( ichknum ) = ratio_ftl |
397 |
|
398 |
irecmem ( ichknum ) = icvrec |
399 |
bimem ( ichknum ) = itile |
400 |
bjmem ( ichknum ) = jtile |
401 |
ilocmem ( ichknum ) = itilepos |
402 |
jlocmem ( ichknum ) = jtilepos |
403 |
klocmem ( ichknum ) = layer |
404 |
iobcsmem ( ichknum ) = obcspos |
405 |
icompmem ( ichknum ) = icomp |
406 |
ichkmem ( ichknum ) = ichknum |
407 |
itestmem ( ichknum ) = itest |
408 |
ierrmem ( ichknum ) = ierr |
409 |
|
410 |
print *, 'ph-grd 3 -------------------------------' |
411 |
print '(a,5I5,2x,3(1x,E15.9))', ' ph-grd 3 ', |
412 |
& myprocid,ichknum,itilepos,jtilepos,layer, |
413 |
& fcref, fcpertplus, fcpertminus |
414 |
#ifdef ALLOW_TANGENTLINEAR_RUN |
415 |
print '(a,5I5,2x,3(1x,E15.9))', ' ph-grd 3 ', |
416 |
& myprocid,ichknum,ichkmem(ichknum), |
417 |
& icompmem(ichknum),itestmem(ichknum), |
418 |
& ftlxxmemo, gfd, ratio_ftl |
419 |
#else |
420 |
print '(a,5I5,2x,3(1x,E15.9))', ' ph-grd 3 ', |
421 |
& myprocid,ichknum,ichkmem(ichknum), |
422 |
& icompmem(ichknum),itestmem(ichknum), |
423 |
& adxxmemo, gfd, ratio_ad |
424 |
#endif |
425 |
|
426 |
endif |
427 |
|
428 |
print *, 'ph-grd ierr ---------------------------' |
429 |
print *, 'ph-grd ierr = ', ierr, ', icomp = ', icomp, |
430 |
& ', ichknum = ', ichknum |
431 |
|
432 |
_BARRIER |
433 |
|
434 |
c-- else of if ( ichknum ... |
435 |
else |
436 |
ierr_grdchk = -1 |
437 |
|
438 |
c-- end of if ( ichknum ... |
439 |
endif |
440 |
|
441 |
c-- end of do icomp = ... |
442 |
enddo |
443 |
|
444 |
if ( myProcId .EQ. grdchkwhichproc ) then |
445 |
CALL WRITE_REC_XYZ_RL( |
446 |
& 'grd_findiff' , tmpplot1, 1, 0, myThid) |
447 |
CALL WRITE_REC_XYZ_RL( |
448 |
& 'grd_ratio_ad' , tmpplot2, 1, 0, myThid) |
449 |
CALL WRITE_REC_XYZ_RL( |
450 |
& 'grd_ratio_ftl' , tmpplot3, 1, 0, myThid) |
451 |
endif |
452 |
|
453 |
c-- Everyone has to wait for the component to be reset. |
454 |
_BARRIER |
455 |
|
456 |
c-- Print the results of the gradient check. |
457 |
call grdchk_print( ichknum, ierr_grdchk, mythid ) |
458 |
|
459 |
#endif /* ALLOW_GRADIENT_CHECK */ |
460 |
|
461 |
end |