/[MITgcm]/MITgcm_contrib/dgoldberg/streamice/streamice_cg_solve.F
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Revision 1.5 - (hide annotations) (download)
Thu Jul 26 16:13:18 2012 UTC (13 years ago) by dgoldberg
Branch: MAIN
Changes since 1.4: +7 -1 lines
replace print statements with print_message calls

1 dgoldberg 1.5 C $Header: /u/gcmpack/MITgcm_contrib/dgoldberg/streamice/streamice_cg_solve.F,v 1.4 2012/07/19 18:46:56 dgoldberg Exp $
2 heimbach 1.1 C $Name: $
3    
4     #include "STREAMICE_OPTIONS.h"
5    
6     C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|
7    
8     CBOP
9     SUBROUTINE STREAMICE_CG_SOLVE(
10 dgoldberg 1.4 U cg_Uin, ! x-velocities
11     U cg_Vin, ! y-velocities
12     I cg_Bu, ! force in x dir
13     I cg_Bv, ! force in y dir
14     I A_uu, ! section of matrix that multiplies u and projects on u
15     I A_uv, ! section of matrix that multiplies v and projects on u
16     I A_vu, ! section of matrix that multiplies u and projects on v
17     I A_vv, ! section of matrix that multiplies v and projects on v
18 heimbach 1.1 I tolerance,
19 heimbach 1.2 O iters,
20     I myThid )
21 heimbach 1.1 C /============================================================\
22     C | SUBROUTINE |
23     C | o |
24     C |============================================================|
25     C | |
26     C \============================================================/
27     IMPLICIT NONE
28    
29     C === Global variables ===
30     #include "SIZE.h"
31     #include "EEPARAMS.h"
32     #include "PARAMS.h"
33     #include "STREAMICE.h"
34     #include "STREAMICE_CG.h"
35    
36    
37     C !INPUT/OUTPUT ARGUMENTS
38     C cg_Uin, cg_Vin - input and output velocities
39     C cg_Bu, cg_Bv - driving stress
40     INTEGER myThid
41     INTEGER iters
42     _RL tolerance
43     _RL cg_Uin (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
44     _RL cg_Vin (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
45     _RL cg_Bu (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
46     _RL cg_Bv (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
47 dgoldberg 1.4 _RL
48     & A_uu (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy,-1:1,-1:1),
49     & A_vu (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy,-1:1,-1:1),
50     & A_uv (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy,-1:1,-1:1),
51     & A_vv (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy,-1:1,-1:1)
52 heimbach 1.1
53     C LOCAL VARIABLES
54     INTEGER i, j, bi, bj, cg_halo, conv_flag
55     INTEGER iter, is, js, ie, je, colx, coly, k
56 dgoldberg 1.4 _RL dot_p1, dot_p2, alpha_k, beta_k, resid, resid_0
57 heimbach 1.1 _RL dot_p1_tile (nSx,nSy)
58     _RL dot_p2_tile (nSx,nSy)
59 dgoldberg 1.5 CHARACTER*(MAX_LEN_MBUF) msgBuf
60 heimbach 1.1
61     iters = streamice_max_cg_iter
62    
63     #ifdef ALLOW_STREAMICE
64    
65 dgoldberg 1.4
66 heimbach 1.1 conv_flag = 0
67    
68 dgoldberg 1.4
69 heimbach 1.1 DO bj = myByLo(myThid), myByHi(myThid)
70     DO bi = myBxLo(myThid), myBxHi(myThid)
71     DO j=1,sNy
72     DO i=1,sNx
73     Zu_SI (i,j,bi,bj) = 0. _d 0
74     Zv_SI (i,j,bi,bj) = 0. _d 0
75     Ru_SI (i,j,bi,bj) = 0. _d 0
76     Rv_SI (i,j,bi,bj) = 0. _d 0
77     Au_SI (i,j,bi,bj) = 0. _d 0
78     Av_SI (i,j,bi,bj) = 0. _d 0
79     Du_SI (i,j,bi,bj) = 0. _d 0
80     Dv_SI (i,j,bi,bj) = 0. _d 0
81     ENDDO
82     ENDDO
83     ENDDO
84     ENDDO
85 dgoldberg 1.4
86     C FIND INITIAL RESIDUAL, and initialize r
87 heimbach 1.1
88 dgoldberg 1.4 ! #ifdef STREAMICE_CONSTRUCT_MATRIX
89 heimbach 1.1
90 dgoldberg 1.4
91    
92     DO bj = myByLo(myThid), myByHi(myThid)
93     DO bi = myBxLo(myThid), myBxHi(myThid)
94     DO j=1,sNy
95     DO i=1,sNx
96     DO colx=-1,1
97     DO coly=-1,1
98     Au_SI(i,j,bi,bj) = Au_SI(i,j,bi,bj) +
99     & A_uu(i,j,bi,bj,colx,coly)*
100     & cg_Uin(i+colx,j+coly,bi,bj)+
101     & A_uv(i,j,bi,bj,colx,coly)*
102     & cg_Vin(i+colx,j+coly,bi,bj)
103 heimbach 1.1
104 dgoldberg 1.4
105     Av_SI(i,j,bi,bj) = Av_SI(i,j,bi,bj) +
106     & A_vu(i,j,bi,bj,colx,coly)*
107     & cg_Uin(i+colx,j+coly,bi,bj)+
108     & A_vv(i,j,bi,bj,colx,coly)*
109     & cg_Vin(i+colx,j+coly,bi,bj)
110     ENDDO
111     ENDDO
112     ENDDO
113     ENDDO
114 heimbach 1.1 ENDDO
115     ENDDO
116    
117 dgoldberg 1.4
118 heimbach 1.1 _EXCH_XY_RL( Au_SI, myThid )
119     _EXCH_XY_RL( Av_SI, myThid )
120    
121 dgoldberg 1.4
122 heimbach 1.1 DO bj = myByLo(myThid), myByHi(myThid)
123     DO bi = myBxLo(myThid), myBxHi(myThid)
124     DO j=1-OLy,sNy+OLy
125     DO i=1-OLx,sNx+OLx
126 dgoldberg 1.4 Ru_SI(i,j,bi,bj)=cg_Bu(i,j,bi,bj)-
127 heimbach 1.1 & Au_SI(i,j,bi,bj)
128 dgoldberg 1.4 Rv_SI(i,j,bi,bj)=cg_Bv(i,j,bi,bj)-
129 heimbach 1.1 & Av_SI(i,j,bi,bj)
130     ENDDO
131     ENDDO
132     dot_p1_tile(bi,bj) = 0. _d 0
133     dot_p2_tile(bi,bj) = 0. _d 0
134     ENDDO
135     ENDDO
136    
137 dgoldberg 1.4
138    
139 heimbach 1.1 DO bj = myByLo(myThid), myByHi(myThid)
140     DO bi = myBxLo(myThid), myBxHi(myThid)
141     DO j=1,sNy
142     DO i=1,sNx
143     IF (STREAMICE_umask(i,j,bi,bj).eq.1.0)
144     & dot_p1_tile(bi,bj)=dot_p1_tile(bi,bj)+Ru_SI(i,j,bi,bj)**2
145     IF (STREAMICE_vmask(i,j,bi,bj).eq.1.0)
146     & dot_p1_tile(bi,bj)=dot_p1_tile(bi,bj)+Rv_SI(i,j,bi,bj)**2
147     ENDDO
148     ENDDO
149     ENDDO
150     ENDDO
151    
152     CALL GLOBAL_SUM_TILE_RL( dot_p1_tile, dot_p1, myThid )
153     resid_0 = sqrt(dot_p1)
154    
155 dgoldberg 1.5 WRITE(msgBuf,'(A,E14.7)') 'CONJ GRAD INIT RESID, ',
156     & resid_0
157     CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,
158     & SQUEEZE_RIGHT , 1)
159    
160 dgoldberg 1.4 C CCCCCCCCCCCCCCCCCCCC
161    
162 heimbach 1.1 DO bj = myByLo(myThid), myByHi(myThid)
163     DO bi = myBxLo(myThid), myBxHi(myThid)
164     DO j=1-OLy,sNy+OLy
165     DO i=1-OLx,sNx+OLx
166     IF (STREAMICE_umask(i,j,bi,bj).eq.1.0)
167     & Zu_SI(i,j,bi,bj)=Ru_SI(i,j,bi,bj) / DIAGu_SI(i,j,bi,bj)
168     IF (STREAMICE_vmask(i,j,bi,bj).eq.1.0)
169     & Zv_SI(i,j,bi,bj)=Rv_SI(i,j,bi,bj) / DIAGv_SI(i,j,bi,bj)
170     ENDDO
171     ENDDO
172     ENDDO
173     ENDDO
174    
175     cg_halo = min(OLx-1,OLy-1)
176     conv_flag = 0
177    
178     DO bj = myByLo(myThid), myByHi(myThid)
179     DO bi = myBxLo(myThid), myBxHi(myThid)
180     DO j=1-OLy,sNy+OLy
181     DO i=1-OLx,sNx+OLx
182     Du_SI(i,j,bi,bj)=Zu_SI(i,j,bi,bj)
183     Dv_SI(i,j,bi,bj)=Zv_SI(i,j,bi,bj)
184     ENDDO
185     ENDDO
186     ENDDO
187     ENDDO
188    
189     resid = resid_0
190     iters = 0
191    
192     c !!!!!!!!!!!!!!!!!!
193     c !! !!
194     c !! MAIN CG LOOP !!
195     c !! !!
196     c !!!!!!!!!!!!!!!!!!
197 dgoldberg 1.4
198    
199    
200 heimbach 1.1
201     c ! initially, b-grid data is valid up to 3 halo nodes out -- right? (check for MITgcm!!)
202    
203     print *, "BEGINNING MAIN CG LOOP"
204    
205 dgoldberg 1.3 ! IF(STREAMICE_construct_matrix) CALL STREAMICE_CG_MAKE_A(myThid)
206    
207 heimbach 1.1
208     do iter = 1, streamice_max_cg_iter
209     if (resid .gt. tolerance*resid_0) then
210    
211     c to avoid using "exit"
212     iters = iters + 1
213    
214     is = 1 - cg_halo
215     ie = sNx + cg_halo
216     js = 1 - cg_halo
217     je = sNy + cg_halo
218    
219     DO bj = myByLo(myThid), myByHi(myThid)
220     DO bi = myBxLo(myThid), myBxHi(myThid)
221     DO j=1-OLy,sNy+OLy
222     DO i=1-OLx,sNx+OLx
223     Au_SI(i,j,bi,bj) = 0. _d 0
224     Av_SI(i,j,bi,bj) = 0. _d 0
225     ENDDO
226     ENDDO
227     ENDDO
228     ENDDO
229    
230 dgoldberg 1.3 ! IF (STREAMICE_construct_matrix) THEN
231    
232 dgoldberg 1.4 ! #ifdef STREAMICE_CONSTRUCT_MATRIX
233 dgoldberg 1.3
234 heimbach 1.1 DO bj = myByLo(myThid), myByHi(myThid)
235     DO bi = myBxLo(myThid), myBxHi(myThid)
236     DO j=js,je
237     DO i=is,ie
238     DO colx=-1,1
239     DO coly=-1,1
240     Au_SI(i,j,bi,bj) = Au_SI(i,j,bi,bj) +
241 dgoldberg 1.4 & A_uu(i,j,bi,bj,colx,coly)*
242 heimbach 1.1 & Du_SI(i+colx,j+coly,bi,bj)+
243 dgoldberg 1.4 & A_uv(i,j,bi,bj,colx,coly)*
244 heimbach 1.1 & Dv_SI(i+colx,j+coly,bi,bj)
245     Av_SI(i,j,bi,bj) = Av_SI(i,j,bi,bj) +
246 dgoldberg 1.4 & A_vu(i,j,bi,bj,colx,coly)*
247 heimbach 1.1 & Du_SI(i+colx,j+coly,bi,bj)+
248 dgoldberg 1.4 & A_vv(i,j,bi,bj,colx,coly)*
249 heimbach 1.1 & Dv_SI(i+colx,j+coly,bi,bj)
250     ENDDO
251     ENDDO
252     ENDDO
253     ENDDO
254     ENDDO
255     ENDDO
256    
257 dgoldberg 1.3 ! else
258 dgoldberg 1.4 ! #else
259     !
260     ! CALL STREAMICE_CG_ACTION( myThid,
261     ! O Au_SI,
262     ! O Av_SI,
263     ! I Du_SI,
264     ! I Dv_SI,
265     ! I is,ie,js,je)
266     !
267     ! ! ENDIF
268     !
269     ! #endif
270 heimbach 1.1
271    
272     DO bj = myByLo(myThid), myByHi(myThid)
273     DO bi = myBxLo(myThid), myBxHi(myThid)
274     dot_p1_tile(bi,bj) = 0. _d 0
275     dot_p2_tile(bi,bj) = 0. _d 0
276     ENDDO
277     ENDDO
278    
279     DO bj = myByLo(myThid), myByHi(myThid)
280     DO bi = myBxLo(myThid), myBxHi(myThid)
281     DO j=1,sNy
282     DO i=1,sNx
283     IF (STREAMICE_umask(i,j,bi,bj).eq.1.0) THEN
284     dot_p1_tile(bi,bj)=dot_p1_tile(bi,bj)+Zu_SI(i,j,bi,bj)*
285     & Ru_SI(i,j,bi,bj)
286     dot_p2_tile(bi,bj)=dot_p2_tile(bi,bj)+Du_SI(i,j,bi,bj)*
287     & Au_SI(i,j,bi,bj)
288     ENDIF
289     IF (STREAMICE_vmask(i,j,bi,bj).eq.1.0) THEN
290     dot_p1_tile(bi,bj)=dot_p1_tile(bi,bj)+Zv_SI(i,j,bi,bj)*
291     & Rv_SI(i,j,bi,bj)
292     dot_p2_tile(bi,bj)=dot_p2_tile(bi,bj)+Dv_SI(i,j,bi,bj)*
293     & Av_SI(i,j,bi,bj)
294     ENDIF
295     ENDDO
296     ENDDO
297     ENDDO
298     ENDDO
299    
300     CALL GLOBAL_SUM_TILE_RL( dot_p1_tile, dot_p1, myThid )
301     CALL GLOBAL_SUM_TILE_RL( dot_p2_tile, dot_p2, myThid )
302     alpha_k = dot_p1/dot_p2
303    
304     DO bj = myByLo(myThid), myByHi(myThid)
305     DO bi = myBxLo(myThid), myBxHi(myThid)
306     DO j=1-OLy,sNy+OLy
307     DO i=1-OLx,sNx+OLx
308    
309     IF (STREAMICE_umask(i,j,bi,bj).eq.1.0) THEN
310     cg_Uin(i,j,bi,bj)=cg_Uin(i,j,bi,bj)+
311     & alpha_k*Du_SI(i,j,bi,bj)
312     Ru_old_SI(i,j,bi,bj) = Ru_SI(i,j,bi,bj)
313     Zu_old_SI(i,j,bi,bj) = Zu_SI(i,j,bi,bj)
314     Ru_SI(i,j,bi,bj) = Ru_SI(i,j,bi,bj)-
315     & alpha_k*Au_SI(i,j,bi,bj)
316     Zu_SI(i,j,bi,bj) = Ru_SI(i,j,bi,bj) /
317     & DIAGu_SI(i,j,bi,bj)
318     ENDIF
319    
320     IF (STREAMICE_vmask(i,j,bi,bj).eq.1.0) THEN
321     cg_Vin(i,j,bi,bj)=cg_Vin(i,j,bi,bj)+
322     & alpha_k*Dv_SI(i,j,bi,bj)
323     Rv_old_SI(i,j,bi,bj) = Rv_SI(i,j,bi,bj)
324     Zv_old_SI(i,j,bi,bj) = Zv_SI(i,j,bi,bj)
325     Rv_SI(i,j,bi,bj) = Rv_SI(i,j,bi,bj)-
326     & alpha_k*Av_SI(i,j,bi,bj)
327     Zv_SI(i,j,bi,bj) = Rv_SI(i,j,bi,bj) /
328     & DIAGv_SI(i,j,bi,bj)
329    
330     ENDIF
331     ENDDO
332     ENDDO
333     ENDDO
334     ENDDO
335    
336     DO bj = myByLo(myThid), myByHi(myThid)
337     DO bi = myBxLo(myThid), myBxHi(myThid)
338     dot_p1_tile(bi,bj) = 0. _d 0
339     dot_p2_tile(bi,bj) = 0. _d 0
340     ENDDO
341     ENDDO
342    
343     DO bj = myByLo(myThid), myByHi(myThid)
344     DO bi = myBxLo(myThid), myBxHi(myThid)
345     DO j=1,sNy
346     DO i=1,sNx
347    
348     IF (STREAMICE_umask(i,j,bi,bj).eq.1.0) THEN
349     dot_p1_tile(bi,bj)=dot_p1_tile(bi,bj)+Zu_SI(i,j,bi,bj)*
350     & Ru_SI(i,j,bi,bj)
351     dot_p2_tile(bi,bj)=dot_p2_tile(bi,bj)+Zu_old_SI(i,j,bi,bj)*
352     & Ru_old_SI(i,j,bi,bj)
353     ENDIF
354    
355     IF (STREAMICE_vmask(i,j,bi,bj).eq.1.0) THEN
356     dot_p1_tile(bi,bj)=dot_p1_tile(bi,bj)+Zv_SI(i,j,bi,bj)*
357     & Rv_SI(i,j,bi,bj)
358     dot_p2_tile(bi,bj)=dot_p2_tile(bi,bj)+Zv_old_SI(i,j,bi,bj)*
359     & Rv_old_SI(i,j,bi,bj)
360     ENDIF
361    
362     ENDDO
363     ENDDO
364     ENDDO
365     ENDDO
366    
367     CALL GLOBAL_SUM_TILE_RL( dot_p1_tile, dot_p1, myThid )
368     CALL GLOBAL_SUM_TILE_RL( dot_p2_tile, dot_p2, myThid )
369    
370     beta_k = dot_p1/dot_p2
371    
372     DO bj = myByLo(myThid), myByHi(myThid)
373     DO bi = myBxLo(myThid), myBxHi(myThid)
374     DO j=1-OLy,sNy+OLy
375     DO i=1-OLx,sNx+OLx
376     IF (STREAMICE_umask(i,j,bi,bj).eq.1.0)
377     & Du_SI(i,j,bi,bj)=beta_k*Du_SI(i,j,bi,bj)+
378     & Zu_SI(i,j,bi,bj)
379     IF (STREAMICE_vmask(i,j,bi,bj).eq.1.0)
380     & Dv_SI(i,j,bi,bj)=beta_k*Dv_SI(i,j,bi,bj)+
381     & Zv_SI(i,j,bi,bj)
382     ENDDO
383     ENDDO
384     ENDDO
385     ENDDO
386    
387     DO bj = myByLo(myThid), myByHi(myThid)
388     DO bi = myBxLo(myThid), myBxHi(myThid)
389     dot_p1_tile(bi,bj) = 0. _d 0
390     ENDDO
391     ENDDO
392    
393     DO bj = myByLo(myThid), myByHi(myThid)
394     DO bi = myBxLo(myThid), myBxHi(myThid)
395     DO j=1,sNy
396     DO i=1,sNx
397     IF (STREAMICE_umask(i,j,bi,bj).eq.1.0)
398     & dot_p1_tile(bi,bj)=dot_p1_tile(bi,bj)+Ru_SI(i,j,bi,bj)**2
399     IF (STREAMICE_vmask(i,j,bi,bj).eq.1.0)
400     & dot_p1_tile(bi,bj)=dot_p1_tile(bi,bj)+Rv_SI(i,j,bi,bj)**2
401     ENDDO
402     ENDDO
403     ENDDO
404     ENDDO
405    
406     CALL GLOBAL_SUM_TILE_RL( dot_p1_tile, dot_p1, myThid )
407     resid = sqrt(dot_p1)
408    
409     ! IF (iter .eq. 1) then
410     ! print *, alpha_k, beta_k, resid
411     ! ENDIF
412    
413     cg_halo = cg_halo - 1
414    
415     if (cg_halo .eq. 0) then
416     cg_halo = min(OLx-1,OLy-1)
417     _EXCH_XY_RL( Du_SI, myThid )
418     _EXCH_XY_RL( Dv_SI, myThid )
419     _EXCH_XY_RL( Ru_SI, myThid )
420     _EXCH_XY_RL( Rv_SI, myThid )
421     _EXCH_XY_RL( cg_Uin, myThid )
422     _EXCH_XY_RL( cg_Vin, myThid )
423     endif
424    
425 dgoldberg 1.4
426 heimbach 1.1 endif
427     enddo ! end of CG loop
428    
429     c to avoid using "exit"
430     c if iters has reached max_iters there is no convergence
431    
432     IF (iters .lt. streamice_max_cg_iter) THEN
433     conv_flag = 1
434     ENDIF
435    
436 dgoldberg 1.4 ! DO bj = myByLo(myThid), myByHi(myThid)
437     ! DO bi = myBxLo(myThid), myBxHi(myThid)
438     ! DO j=1-OLy,sNy+OLy
439     ! DO i=1-OLy,sNx+OLy
440     ! IF (STREAMICE_umask(i,j,bi,bj).eq.3.0)
441     ! & cg_Uin(i,j,bi,bj)=u_bdry_values_SI(i,j,bi,bj)
442     ! IF (STREAMICE_vmask(i,j,bi,bj).eq.3.0)
443     ! & cg_Vin(i,j,bi,bj)=v_bdry_values_SI(i,j,bi,bj)
444     ! ENDDO
445     ! ENDDO
446     ! ENDDO
447     ! ENDDO
448     !
449     ! _EXCH_XY_RL( cg_Uin, myThid )
450     ! _EXCH_XY_RL( cg_Vin, myThid )
451 heimbach 1.1
452     #endif
453     RETURN
454     END
455    
456    
457    
458    
459    
460    
461    
462    

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