New URL for NEMO forge! http://forge.nemo-ocean.eu

Since March 2022 along with NEMO 4.2 release, the code development moved to a self-hosted GitLab.
This present forge is now archived and remained online for history.

nemogcm.F90 in utils/tools_dev_r12970_AGRIF_CMEMS/DOMAINcfg/src – NEMO

Context Navigation

source: utils/tools_dev_r12970_AGRIF_CMEMS/DOMAINcfg/src/nemogcm.F90 @ 13024

Last change on this file since 13024 was 13024, checked in by rblod, 5 years ago
First version of new nesting tools merged with domaincfg, see ticket #2129
File size: 28.2 KB

Line
1	MODULE nemogcm
2	!!======================================================================
3	!! * MODULE nemogcm *
4	!! Ocean system : NEMO GCM (ocean dynamics, on-line tracers, biochemistry and sea-ice)
5	!!======================================================================
6	!! History : OPA ! 1990-10 (C. Levy, G. Madec) Original code
7	!! 7.0 ! 1991-11 (M. Imbard, C. Levy, G. Madec)
8	!! 7.1 ! 1993-03 (M. Imbard, C. Levy, G. Madec, O. Marti, M. Guyon, A. Lazar,
9	!! P. Delecluse, C. Perigaud, G. Caniaux, B. Colot, C. Maes) release 7.1
10	!! - ! 1992-06 (L.Terray) coupling implementation
11	!! - ! 1993-11 (M.A. Filiberti) IGLOO sea-ice
12	!! 8.0 ! 1996-03 (M. Imbard, C. Levy, G. Madec, O. Marti, M. Guyon, A. Lazar,
13	!! P. Delecluse, L.Terray, M.A. Filiberti, J. Vialar, A.M. Treguier, M. Levy) release 8.0
14	!! 8.1 ! 1997-06 (M. Imbard, G. Madec)
15	!! 8.2 ! 1999-11 (M. Imbard, H. Goosse) LIM sea-ice model
16	!! ! 1999-12 (V. Thierry, A-M. Treguier, M. Imbard, M-A. Foujols) OPEN-MP
17	!! ! 2000-07 (J-M Molines, M. Imbard) Open Boundary Conditions (CLIPPER)
18	!! NEMO 1.0 ! 2002-08 (G. Madec) F90: Free form and modules
19	!! - ! 2004-06 (R. Redler, NEC CCRLE, Germany) add OASIS[3/4] coupled interfaces
20	!! - ! 2004-08 (C. Talandier) New trends organization
21	!! - ! 2005-06 (C. Ethe) Add the 1D configuration possibility
22	!! - ! 2005-11 (V. Garnier) Surface pressure gradient organization
23	!! - ! 2006-03 (L. Debreu, C. Mazauric) Agrif implementation
24	!! - ! 2006-04 (G. Madec, R. Benshila) Step reorganization
25	!! - ! 2007-07 (J. Chanut, A. Sellar) Unstructured open boundaries (BDY)
26	!! 3.2 ! 2009-08 (S. Masson) open/write in the listing file in mpp
27	!! 3.3 ! 2010-05 (K. Mogensen, A. Weaver, M. Martin, D. Lea) Assimilation interface
28	!! - ! 2010-10 (C. Ethe, G. Madec) reorganisation of initialisation phase
29	!! 3.3.1! 2011-01 (A. R. Porter, STFC Daresbury) dynamical allocation
30	!! 3.4 ! 2011-10 (A. C. Coward, NOCS & J. Donners, PRACE) add nemo_northcomms
31	!! - ! 2011-11 (C. Harris) decomposition changes for running with CICE
32	!! 3.6 ! 2012-05 (C. Calone, J. Simeon, G. Madec, C. Ethe) Add grid coarsening
33	!! - ! 2013-06 (I. Epicoco, S. Mocavero, CMCC) nemo_northcomms: setup avoiding MPI communication
34	!! - ! 2014-12 (G. Madec) remove KPP scheme and cross-land advection (cla)
35	!!----------------------------------------------------------------------
36
37	!!----------------------------------------------------------------------
38	!! nemo_gcm : solve ocean dynamics, tracer, biogeochemistry and/or sea-ice
39	!! nemo_init : initialization of the NEMO system
40	!! nemo_ctl : initialisation of the contol print
41	!! nemo_closefile: close remaining open files
42	!! nemo_alloc : dynamical allocation
43	!! nemo_partition: calculate MPP domain decomposition
44	!! factorise : calculate the factors of the no. of MPI processes
45	!!----------------------------------------------------------------------
46	USE dom_oce ! ocean space and time domain variables
47	USE in_out_manager ! I/O manager
48	USE iom !
49	USE domcfg ! domain configuration (dom_cfg routine)
50	USE mppini ! shared/distributed memory setting (mpp_init routine)
51	USE domain ! domain initialization (dom_init routine)
52	USE phycst ! physical constant (par_cst routine)
53	USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined)
54	USE lib_mpp ! distributed memory computing
55
56	USE lbcnfd , ONLY : isendto, nsndto, nfsloop, nfeloop ! Setup of north fold exchanges
57
58	IMPLICIT NONE
59	PRIVATE
60
61	PUBLIC nemo_gcm ! called by model.F90
62	PUBLIC nemo_init ! needed by AGRIF
63	PUBLIC nemo_alloc ! needed by TAM
64
65	CHARACTER(lc) :: cform_aaa="( /, 'AAAAAAAA', / ) " ! flag for output listing
66
67	#if defined key_agrif
68	external agrif_boundary_connections, agrif_update_all, agrif_recompute_scalefactors
69	#endif
70
71	!!----------------------------------------------------------------------
72	!! NEMO/OPA 3.7 , NEMO Consortium (2015)
73	!! $Id: nemogcm.F90 6152 2015-12-21 22:33:57Z acc $
74	!! Software governed by the CeCILL licence (./LICENSE)
75	!!----------------------------------------------------------------------
76	CONTAINS
77
78	SUBROUTINE nemo_gcm
79	!!----------------------------------------------------------------------
80	!! * ROUTINE nemo_gcm *
81	!!
82	!! ** Purpose : NEMO solves the primitive equations on an orthogonal
83	!! curvilinear mesh on the sphere.
84	!!
85	!! ** Method : - model general initialization
86	!! - launch the time-stepping (stp routine)
87	!! - finalize the run by closing files and communications
88	!!
89	!! References : Madec, Delecluse, Imbard, and Levy, 1997: internal report, IPSL.
90	!! Madec, 2008, internal report, IPSL.
91	!!----------------------------------------------------------------------
92	INTEGER :: istp ! time step index
93	!!----------------------------------------------------------------------
94	!
95	#if defined key_agrif
96	CALL Agrif_Init_Grids() ! AGRIF: set the meshes
97	#endif
98	! !-----------------------!
99	CALL nemo_init !== Initialisations ==!
100	! !-----------------------!
101
102	#if defined key_agrif
103	CALL Agrif_Regrid()
104
105	CALL Agrif_Step_Child(agrif_boundary_connections)
106
107	CALL Agrif_Step_Child_adj(agrif_update_all)
108
109	CALL Agrif_Step_Child(agrif_recompute_scalefactors)
110
111	CALL Agrif_Step_Child(cfg_write)
112	#endif
113
114	! check that all process are still there... If some process have an error,
115	! they will never enter in step and other processes will wait until the end of the cpu time!
116	IF( lk_mpp ) CALL mpp_max( 'nemogcm',nstop )
117
118	IF(lwp) WRITE(numout,cform_aaa) ! Flag AAAAAAA
119
120	! !-----------------------!
121	! !== finalize the run ==!
122	! !------------------------!
123	!
124	IF( nstop /= 0 .AND. lwp ) THEN ! error print
125	WRITE(numout,cform_err)
126	WRITE(numout,*) nstop, ' error have been found'
127	ENDIF
128	!
129	!
130	CALL nemo_closefile
131	!
132	!
133	END SUBROUTINE nemo_gcm
134
135
136	SUBROUTINE nemo_init
137	!!----------------------------------------------------------------------
138	!! * ROUTINE nemo_init *
139	!!
140	!! ** Purpose : initialization of the NEMO GCM
141	!!----------------------------------------------------------------------
142	INTEGER :: ji ! dummy loop indices
143	INTEGER :: ios, ilocal_comm ! local integers
144	CHARACTER(len=120), DIMENSION(60) :: cltxt, cltxt2, clnam
145	!!
146	NAMELIST/namctl/ ln_ctl , sn_cfctl, nn_print, nn_ictls, nn_ictle, &
147	& nn_isplt , nn_jsplt, nn_jctls, nn_jctle, &
148	& ln_timing, ln_diacfl
149	NAMELIST/namcfg/ ln_e3_dep, &
150	& cp_cfg, cp_cfz, jp_cfg, jpidta, jpjdta, jpkdta, jpiglo, jpjglo, &
151	& jperio, ln_use_jattr, ln_domclo
152	!!----------------------------------------------------------------------
153	!
154	cltxt = ''
155	!
156	! ! Open reference namelist and configuration namelist files
157	CALL ctl_opn( numnam_ref, 'namelist_ref', 'OLD', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. )
158	CALL ctl_opn( numnam_cfg, 'namelist_cfg', 'OLD', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. )
159	!
160	REWIND( numnam_ref ) ! Namelist namctl in reference namelist
161	READ ( numnam_ref, namctl, IOSTAT = ios, ERR = 901 )
162	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namctl in reference namelist', .TRUE. )
163	REWIND( numnam_cfg ) ! Namelist namctl in confguration namelist
164	READ ( numnam_cfg, namctl, IOSTAT = ios, ERR = 902 )
165	902 IF( ios > 0 ) CALL ctl_nam ( ios , 'namctl in configuration namelist', .TRUE. )
166	!
167	REWIND( numnam_ref ) ! Namelist namcfg in reference namelist
168	READ ( numnam_ref, namcfg, IOSTAT = ios, ERR = 903 )
169	903 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namcfg in reference namelist', .TRUE. )
170	REWIND( numnam_cfg ) ! Namelist namcfg in confguration namelist
171	READ ( numnam_cfg, namcfg, IOSTAT = ios, ERR = 904 )
172	904 IF( ios > 0 ) CALL ctl_nam ( ios , 'namcfg in configuration namelist', .TRUE. )
173
174	! Force values for AGRIF zoom (cf. agrif_user.F90)
175	!
176	! !--------------------------------------------!
177	! ! set communicator & select the local node !
178	! ! NB: mynode also opens output.namelist.dyn !
179	! ! on unit number numond on first proc !
180	! !--------------------------------------------!
181	! Nodes selection (control print return in cltxt)
182	narea = mynode( cltxt, 'output.namelist.dyn', numnam_ref, numnam_cfg, numond , nstop )
183	narea = narea + 1 ! mynode return the rank of proc (0 --> jpnij -1 )
184
185	lwm = (narea == 1) ! control of output namelists
186	lwp = (narea == 1) .OR. ln_ctl ! control of all listing output print
187
188	IF(lwm) THEN
189	! write merged namelists from earlier to output namelist now that the
190	! file has been opened in call to mynode. nammpp has already been
191	! written in mynode (if lk_mpp_mpi)
192	WRITE( numond, namctl )
193	WRITE( numond, namcfg )
194	ENDIF
195
196	IF(lwp) THEN ! open listing units
197	!
198	CALL ctl_opn( numout, 'ocean.output', 'REPLACE', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE., narea )
199	!
200	WRITE(numout,*)
201	WRITE(numout,*) ' CNRS - NERC - Met OFFICE - MERCATOR-ocean - INGV - CMCC'
202	WRITE(numout,*) ' NEMO team'
203	WRITE(numout,*) ' Ocean General Circulation Model'
204	WRITE(numout,*) ' NEMO version 4.0 (2019) '
205	WRITE(numout,*)
206	WRITE(numout,*) " ._ ._ ._ ._ ._ "
207	WRITE(numout,*) " _.-._)`\_.-._)`\_.-._)`\_.-._)`\_.-._)`\_ "
208	WRITE(numout,*)
209	WRITE(numout,*) " o _, _, "
210	WRITE(numout,*) " o .' ( .-' / "
211	WRITE(numout,*) " o _/..._'. .' / "
212	WRITE(numout,*) " ( o .-'` ` '-./ _.' "
213	WRITE(numout,*) " ) ( o) ;= <_ ( "
214	WRITE(numout,*) " ( '-.,\\__ __.-;`\ '. ) "
215	WRITE(numout,*) " ) ) \) \|`\ \) '. \ ( ( "
216	WRITE(numout,*) " ( ( \_/ '-._\ ) ) "
217	WRITE(numout,*) " ) ) ` ( ( "
218	WRITE(numout,*) " ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ "
219	WRITE(numout,*)
220
221	DO ji = 1, SIZE(cltxt)
222	IF( TRIM(cltxt (ji)) /= '' ) WRITE(numout,*) TRIM(cltxt(ji)) ! control print of mynode
223	END DO
224	WRITE(numout,*)
225	WRITE(numout,*)
226	! DO ji = 1, SIZE(cltxt2)
227	! IF( TRIM(cltxt2(ji)) /= '' ) WRITE(numout,*) TRIM(cltxt2(ji)) ! control print of domain size
228	! END DO
229	!
230	WRITE(numout,cform_aaa) ! Flag AAAAAAA
231	!
232	ENDIF
233	! open /dev/null file to be able to supress output write easily
234	! CALL ctl_opn( numnul, '/dev/null', 'REPLACE', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. )
235	!
236	! ! Domain decomposition
237	CALL mpp_init ! MPP
238
239	! IF( Agrif_Root() ) THEN
240	! jpi = ( jpiglo -2jpreci + (jpni-1) ) / jpni + 2jpreci ! first dim.
241	! jpj = ( jpjglo -2jprecj + (jpnj-1) ) / jpnj + 2jprecj ! second dim.
242	! ENDIF
243	jpk = jpkdta ! third dim
244	jpim1 = jpi-1 ! inner domain indices
245	jpjm1 = jpj-1 ! " "
246	jpkm1 = jpk-1 ! " "
247	jpij = jpi*jpj ! jpi x j
248
249	#if defined key_agrif
250	CALL Agrif_Declare_Var
251	#endif
252
253	! Now we know the dimensions of the grid and numout has been set: we can allocate arrays
254	CALL nemo_alloc()
255
256	! !-------------------------------!
257	! ! NEMO general initialization !
258	! !-------------------------------!
259
260	CALL nemo_ctl ! Control prints & Benchmark
261
262	! ! Domain decomposition
263	!
264	! ! General initialization
265	CALL phy_cst ! Physical constants
266	CALL dom_cfg ! Domain configuration
267	CALL dom_init ! Domain
268	!
269	END SUBROUTINE nemo_init
270
271
272	SUBROUTINE nemo_ctl
273	!!----------------------------------------------------------------------
274	!! * ROUTINE nemo_ctl *
275	!!
276	!! ** Purpose : control print setting
277	!!
278	!! ** Method : - print namctl information and check some consistencies
279	!!----------------------------------------------------------------------
280	!
281	IF(lwp) THEN ! control print
282	WRITE(numout,*)
283	WRITE(numout,*) 'nemo_ctl: Control prints'
284	WRITE(numout,*) '~~~~~~~~'
285	WRITE(numout,*) ' Namelist namctl'
286	WRITE(numout,*) ' run control (for debugging) ln_ctl = ', ln_ctl
287	WRITE(numout,*) ' finer control over o/p sn_cfctl%l_config = ', sn_cfctl%l_config
288	WRITE(numout,*) ' sn_cfctl%l_runstat = ', sn_cfctl%l_runstat
289	WRITE(numout,*) ' sn_cfctl%l_trcstat = ', sn_cfctl%l_trcstat
290	WRITE(numout,*) ' sn_cfctl%l_oceout = ', sn_cfctl%l_oceout
291	WRITE(numout,*) ' sn_cfctl%l_layout = ', sn_cfctl%l_layout
292	WRITE(numout,*) ' sn_cfctl%l_mppout = ', sn_cfctl%l_mppout
293	WRITE(numout,*) ' sn_cfctl%l_mpptop = ', sn_cfctl%l_mpptop
294	WRITE(numout,*) ' sn_cfctl%procmin = ', sn_cfctl%procmin
295	WRITE(numout,*) ' sn_cfctl%procmax = ', sn_cfctl%procmax
296	WRITE(numout,*) ' sn_cfctl%procincr = ', sn_cfctl%procincr
297	WRITE(numout,*) ' sn_cfctl%ptimincr = ', sn_cfctl%ptimincr
298	WRITE(numout,*) ' level of print nn_print = ', nn_print
299	WRITE(numout,*) ' Start i indice for SUM control nn_ictls = ', nn_ictls
300	WRITE(numout,*) ' End i indice for SUM control nn_ictle = ', nn_ictle
301	WRITE(numout,*) ' Start j indice for SUM control nn_jctls = ', nn_jctls
302	WRITE(numout,*) ' End j indice for SUM control nn_jctle = ', nn_jctle
303	WRITE(numout,*) ' number of proc. following i nn_isplt = ', nn_isplt
304	WRITE(numout,*) ' number of proc. following j nn_jsplt = ', nn_jsplt
305	WRITE(numout,*) ' timing by routine ln_timing = ', ln_timing
306	WRITE(numout,*) ' CFL diagnostics ln_diacfl = ', ln_diacfl
307	ENDIF
308	!
309	nprint = nn_print ! convert DOCTOR namelist names into OLD names
310	nictls = nn_ictls
311	nictle = nn_ictle
312	njctls = nn_jctls
313	njctle = nn_jctle
314	isplt = nn_isplt
315	jsplt = nn_jsplt
316
317	!
318	! ! Parameter control
319	!
320	IF( ln_ctl ) THEN ! sub-domain area indices for the control prints
321	IF( lk_mpp .AND. jpnij > 1 ) THEN
322	isplt = jpni ; jsplt = jpnj ; ijsplt = jpni*jpnj ! the domain is forced to the real split domain
323	ELSE
324	IF( isplt == 1 .AND. jsplt == 1 ) THEN
325	CALL ctl_warn( ' - isplt & jsplt are equal to 1', &
326	& ' - the print control will be done over the whole domain' )
327	ENDIF
328	ijsplt = isplt * jsplt ! total number of processors ijsplt
329	ENDIF
330	IF(lwp) WRITE(numout,*)' - The total number of processors over which the'
331	IF(lwp) WRITE(numout,*)' print control will be done is ijsplt : ', ijsplt
332	!
333	! ! indices used for the SUM control
334	IF( nictls+nictle+njctls+njctle == 0 ) THEN ! print control done over the default area
335	lsp_area = .FALSE.
336	ELSE ! print control done over a specific area
337	lsp_area = .TRUE.
338	IF( nictls < 1 .OR. nictls > jpiglo ) THEN
339	CALL ctl_warn( ' - nictls must be 1<=nictls>=jpiglo, it is forced to 1' )
340	nictls = 1
341	ENDIF
342	IF( nictle < 1 .OR. nictle > jpiglo ) THEN
343	CALL ctl_warn( ' - nictle must be 1<=nictle>=jpiglo, it is forced to jpiglo' )
344	nictle = jpiglo
345	ENDIF
346	IF( njctls < 1 .OR. njctls > jpjglo ) THEN
347	CALL ctl_warn( ' - njctls must be 1<=njctls>=jpjglo, it is forced to 1' )
348	njctls = 1
349	ENDIF
350	IF( njctle < 1 .OR. njctle > jpjglo ) THEN
351	CALL ctl_warn( ' - njctle must be 1<=njctle>=jpjglo, it is forced to jpjglo' )
352	njctle = jpjglo
353	ENDIF
354	ENDIF
355	ENDIF
356	!
357	! IF( 1._wp /= SIGN(1._wp,-0._wp) ) CALL ctl_stop( 'nemo_ctl: The intrinsec SIGN function follows f2003 standard.', &
358	! & 'Compile with key_nosignedzero enabled:', &
359	! & '--> add -Dkey_nosignedzero to the definition of %CPP in your arch file' )
360	!
361	#if defined key_agrif
362	IF( ln_timing ) CALL ctl_stop( 'AGRIF not implemented with ln_timing = true')
363	#endif
364	!
365	END SUBROUTINE nemo_ctl
366
367
368	SUBROUTINE nemo_closefile
369	!!----------------------------------------------------------------------
370	!! * ROUTINE nemo_closefile *
371	!!
372	!! ** Purpose : Close the files
373	!!----------------------------------------------------------------------
374	!
375	IF( lk_mpp ) CALL mppsync
376	!
377	CALL iom_close ! close all input/output files managed by iom_*
378	!
379	IF( numstp /= -1 ) CLOSE( numstp ) ! time-step file
380	IF( numnam_ref /= -1 ) CLOSE( numnam_ref ) ! oce reference namelist
381	IF( numnam_cfg /= -1 ) CLOSE( numnam_cfg ) ! oce configuration namelist
382	IF( lwm.AND.numond /= -1 ) CLOSE( numond ) ! oce output namelist
383	IF( numnam_ice_ref /= -1 ) CLOSE( numnam_ice_ref ) ! ice reference namelist
384	IF( numnam_ice_cfg /= -1 ) CLOSE( numnam_ice_cfg ) ! ice configuration namelist
385	IF( lwm.AND.numoni /= -1 ) CLOSE( numoni ) ! ice output namelist
386	IF( numevo_ice /= -1 ) CLOSE( numevo_ice ) ! ice variables (temp. evolution)
387	IF( numout /= 6 ) CLOSE( numout ) ! standard model output file
388	IF( numdct_vol /= -1 ) CLOSE( numdct_vol ) ! volume transports
389	IF( numdct_heat /= -1 ) CLOSE( numdct_heat ) ! heat transports
390	IF( numdct_salt /= -1 ) CLOSE( numdct_salt ) ! salt transports
391	!
392	numout = 6 ! redefine numout in case it is used after this point...
393	!
394	END SUBROUTINE nemo_closefile
395
396
397	SUBROUTINE nemo_alloc
398	!!----------------------------------------------------------------------
399	!! * ROUTINE nemo_alloc *
400	!!
401	!! ** Purpose : Allocate all the dynamic arrays of the OPA modules
402	!!
403	!! ** Method :
404	!!----------------------------------------------------------------------
405	USE dom_oce , ONLY: dom_oce_alloc
406	!
407	INTEGER :: ierr
408	!!----------------------------------------------------------------------
409	!
410	ierr = 0
411	ierr = ierr + dom_oce_alloc () ! ocean domain
412	!
413	CALL mpp_sum( 'nemogcm', ierr )
414	IF( ierr /= 0 ) CALL ctl_stop( 'STOP', 'nemo_alloc : unable to allocate standard ocean arrays' )
415	!
416	END SUBROUTINE nemo_alloc
417
418
419	SUBROUTINE nemo_partition( num_pes )
420	!!----------------------------------------------------------------------
421	!! * ROUTINE nemo_partition *
422	!!
423	!! ** Purpose :
424	!!
425	!! ** Method :
426	!!----------------------------------------------------------------------
427	INTEGER, INTENT(in) :: num_pes ! The number of MPI processes we have
428	!
429	INTEGER, PARAMETER :: nfactmax = 20
430	INTEGER :: nfact ! The no. of factors returned
431	INTEGER :: ierr ! Error flag
432	INTEGER :: ji
433	INTEGER :: idiff, mindiff, imin ! For choosing pair of factors that are closest in value
434	INTEGER, DIMENSION(nfactmax) :: ifact ! Array of factors
435	!!----------------------------------------------------------------------
436	!
437	ierr = 0
438	!
439	CALL factorise( ifact, nfactmax, nfact, num_pes, ierr )
440	!
441	IF( nfact <= 1 ) THEN
442	WRITE (numout, *) 'WARNING: factorisation of number of PEs failed'
443	WRITE (numout, *) ' : using grid of ',num_pes,' x 1'
444	jpnj = 1
445	jpni = num_pes
446	ELSE
447	! Search through factors for the pair that are closest in value
448	mindiff = 1000000
449	imin = 1
450	DO ji = 1, nfact-1, 2
451	idiff = ABS( ifact(ji) - ifact(ji+1) )
452	IF( idiff < mindiff ) THEN
453	mindiff = idiff
454	imin = ji
455	ENDIF
456	END DO
457	jpnj = ifact(imin)
458	jpni = ifact(imin + 1)
459	ENDIF
460	!
461	jpnij = jpni*jpnj
462	!
463	END SUBROUTINE nemo_partition
464
465
466	SUBROUTINE factorise( kfax, kmaxfax, knfax, kn, kerr )
467	!!----------------------------------------------------------------------
468	!! * ROUTINE factorise *
469	!!
470	!! ** Purpose : return the prime factors of n.
471	!! knfax factors are returned in array kfax which is of
472	!! maximum dimension kmaxfax.
473	!! ** Method :
474	!!----------------------------------------------------------------------
475	INTEGER , INTENT(in ) :: kn, kmaxfax
476	INTEGER , INTENT( out) :: kerr, knfax
477	INTEGER, DIMENSION(kmaxfax), INTENT( out) :: kfax
478	!
479	INTEGER :: ifac, jl, inu
480	INTEGER, PARAMETER :: ntest = 14
481	INTEGER, DIMENSION(ntest) :: ilfax
482	!!----------------------------------------------------------------------
483	!
484	! lfax contains the set of allowed factors.
485	ilfax(:) = (/(2**jl,jl=ntest,1,-1)/)
486	!
487	! Clear the error flag and initialise output vars
488	kerr = 0
489	kfax = 1
490	knfax = 0
491	!
492	! Find the factors of n.
493	IF( kn == 1 ) GOTO 20
494
495	! nu holds the unfactorised part of the number.
496	! knfax holds the number of factors found.
497	! l points to the allowed factor list.
498	! ifac holds the current factor.
499	!
500	inu = kn
501	knfax = 0
502	!
503	DO jl = ntest, 1, -1
504	!
505	ifac = ilfax(jl)
506	IF( ifac > inu ) CYCLE
507
508	! Test whether the factor will divide.
509
510	IF( MOD(inu,ifac) == 0 ) THEN
511	!
512	knfax = knfax + 1 ! Add the factor to the list
513	IF( knfax > kmaxfax ) THEN
514	kerr = 6
515	write (,) 'FACTOR: insufficient space in factor array ', knfax
516	return
517	ENDIF
518	kfax(knfax) = ifac
519	! Store the other factor that goes with this one
520	knfax = knfax + 1
521	kfax(knfax) = inu / ifac
522	!WRITE (,) 'ARPDBG, factors ',knfax-1,' & ',knfax,' are ', kfax(knfax-1),' and ',kfax(knfax)
523	ENDIF
524	!
525	END DO
526	!
527	20 CONTINUE ! Label 20 is the exit point from the factor search loop.
528	!
529	END SUBROUTINE factorise
530
531
532	SUBROUTINE nemo_northcomms
533	!!----------------------------------------------------------------------
534	!! * ROUTINE nemo_northcomms *
535	!! ** Purpose : Setup for north fold exchanges with explicit
536	!! point-to-point messaging
537	!!
538	!! ** Method : Initialization of the northern neighbours lists.
539	!!----------------------------------------------------------------------
540	!! 1.0 ! 2011-10 (A. C. Coward, NOCS & J. Donners, PRACE)
541	!! 2.0 ! 2013-06 Setup avoiding MPI communication (I. Epicoco, S. Mocavero, CMCC)
542	!!----------------------------------------------------------------------
543	INTEGER :: sxM, dxM, sxT, dxT, jn
544	INTEGER :: njmppmax
545	!!----------------------------------------------------------------------
546	!
547	njmppmax = MAXVAL( njmppt )
548	!
549	!initializes the north-fold communication variables
550	isendto(:) = 0
551	nsndto = 0
552	!
553	!if I am a process in the north
554	IF ( njmpp == njmppmax ) THEN
555	!sxM is the first point (in the global domain) needed to compute the
556	!north-fold for the current process
557	sxM = jpiglo - nimppt(narea) - nlcit(narea) + 1
558	!dxM is the last point (in the global domain) needed to compute the
559	!north-fold for the current process
560	dxM = jpiglo - nimppt(narea) + 2
561
562	!loop over the other north-fold processes to find the processes
563	!managing the points belonging to the sxT-dxT range
564
565	DO jn = 1, jpni
566	!sxT is the first point (in the global domain) of the jn
567	!process
568	sxT = nfiimpp(jn, jpnj)
569	!dxT is the last point (in the global domain) of the jn
570	!process
571	dxT = nfiimpp(jn, jpnj) + nfilcit(jn, jpnj) - 1
572	IF ((sxM .gt. sxT) .AND. (sxM .lt. dxT)) THEN
573	nsndto = nsndto + 1
574	isendto(nsndto) = jn
575	ELSEIF ((sxM .le. sxT) .AND. (dxM .ge. dxT)) THEN
576	nsndto = nsndto + 1
577	isendto(nsndto) = jn
578	ELSEIF ((dxM .lt. dxT) .AND. (sxT .lt. dxM)) THEN
579	nsndto = nsndto + 1
580	isendto(nsndto) = jn
581	END IF
582	END DO
583	nfsloop = 1
584	nfeloop = nlci
585	DO jn = 2,jpni-1
586	IF(nfipproc(jn,jpnj) .eq. (narea - 1)) THEN
587	IF (nfipproc(jn - 1 ,jpnj) .eq. -1) THEN
588	nfsloop = nldi
589	ENDIF
590	IF (nfipproc(jn + 1,jpnj) .eq. -1) THEN
591	nfeloop = nlei
592	ENDIF
593	ENDIF
594	END DO
595
596	ENDIF
597	#if defined key_mpp_mpi
598	l_north_nogather = .TRUE.
599	#endif
600	END SUBROUTINE nemo_northcomms
601
602
603	!!======================================================================
604	END MODULE nemogcm
605

Note: See TracBrowser for help on using the repository browser.

Download in other formats: