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nemogcm.F90 @ 8219

Last change on this file since 8219 was 8219, checked in by lovato, 7 years ago
trunk : implementation of unified mppini routines - 2017WP (#1916)
Property svn:keywords set to `Id`
File size: 27.0 KB

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1	MODULE nemogcm
2	!!======================================================================
3	!! * MODULE nemogcm *
4	!! Ocean system : NEMO GCM (ocean dynamics, on-line tracers, biochemistry and sea-ice)
5	!!======================================================================
6	!! History : 3.6 ! 2015-12 (A. Ryan) Original code (from OPA_SRC/)
7	!! 4.0 ! 2016-11 (G. Madec, S. Flavoni) domain configuration / user defined interface
8	!!----------------------------------------------------------------------
9
10	!!----------------------------------------------------------------------
11	!! nemo_gcm : solve ocean dynamics, tracer, biogeochemistry and/or sea-ice
12	!! nemo_init : initialization of the NEMO system
13	!! nemo_ctl : initialisation of the contol print
14	!! nemo_closefile: close remaining open files
15	!! nemo_alloc : dynamical allocation
16	!! nemo_partition: calculate MPP domain decomposition
17	!! factorise : calculate the factors of the no. of MPI processes
18	!!----------------------------------------------------------------------
19	USE step_oce ! module used in the ocean time stepping module (step.F90)
20	USE domain ! domain initialization (dom_init & dom_cfg routines)
21	USE istate ! initial state setting (istate_init routine)
22	USE phycst ! physical constant (par_cst routine)
23	USE step ! NEMO time-stepping (stp routine)
24	USE cpl_oasis3 ! OASIS3 coupling
25	USE diaobs ! Observation diagnostics (dia_obs_init routine)
26	#if defined key_nemocice_decomp
27	USE ice_domain_size, only: nx_global, ny_global
28	#endif
29	! ! Stand Alone Observation operator modules
30	USE sao_data
31	USE sao_intp
32	!
33	USE lib_mpp ! distributed memory computing
34	USE mppini ! shared/distributed memory setting (mpp_init routine)
35	USE lbcnfd , ONLY : isendto, nsndto, nfsloop, nfeloop ! Setup of north fold exchanges
36	USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined)
37	#if defined key_iomput
38	USE xios ! xIOserver
39	#endif
40
41	IMPLICIT NONE
42	PRIVATE
43
44	PUBLIC nemo_gcm ! called by model.F90
45	PUBLIC nemo_init ! needed by AGRIF
46	PUBLIC nemo_alloc ! needed by TAM
47
48	CHARACTER(lc) :: cform_aaa="( /, 'AAAAAAAA', / ) " ! flag for output listing
49
50	!!----------------------------------------------------------------------
51	!! NEMO/OPA 4.0 , NEMO Consortium (2016)
52	!! $Id$
53	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
54	!!----------------------------------------------------------------------
55	CONTAINS
56
57	SUBROUTINE nemo_gcm
58	!!----------------------------------------------------------------------
59	!! * SUBROUTINE offline_obs_oper *
60	!!
61	!! ** Purpose : To use NEMO components to interpolate model fields
62	!! to observation space.
63	!!
64	!! ** Method : 1. Initialise NEMO
65	!! 2. Initialise offline obs_oper
66	!! 3. Cycle through match ups
67	!! 4. Write results to file
68	!!----------------------------------------------------------------------
69	!
70	CALL nemo_init ! Initialise NEMO
71	!
72	CALL sao_data_init ! Initialise Stand Alone Observation operator data
73	!
74	CALL dia_obs_init ! Initialise obs_operator
75	!
76	CALL sao_interp ! Interpolate to observation space
77	!
78	CALL dia_obs_wri ! Pipe to output files
79	!
80	CALL dia_obs_dealloc ! Reset the obs_oper between
81	!
82	IF(lk_mpp) CALL mppstop ! Safely stop MPI (end mpp communications)
83	!
84	END SUBROUTINE nemo_gcm
85
86
87	SUBROUTINE nemo_init
88	!!----------------------------------------------------------------------
89	!! * ROUTINE nemo_init *
90	!!
91	!! ** Purpose : initialization of the NEMO GCM
92	!!----------------------------------------------------------------------
93	INTEGER :: ji ! dummy loop indices
94	INTEGER :: ios, ilocal_comm ! local integer
95	CHARACTER(len=120), DIMENSION(30) :: cltxt, cltxt2, clnam
96	!
97	NAMELIST/namctl/ ln_ctl , nn_print, nn_ictls, nn_ictle, &
98	& nn_isplt , nn_jsplt, nn_jctls, nn_jctle, &
99	& nn_timing, nn_diacfl
100	NAMELIST/namcfg/ ln_read_cfg, cn_domcfg, ln_write_cfg, cn_domcfg_out, ln_use_jattr
101	!!----------------------------------------------------------------------
102	!
103	cltxt = ''
104	cltxt2 = ''
105	clnam = ''
106	cxios_context = 'nemo'
107	!
108	! ! Open reference namelist and configuration namelist files
109	CALL ctl_opn( numnam_ref, 'namelist_ref', 'OLD', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. )
110	CALL ctl_opn( numnam_cfg, 'namelist_cfg', 'OLD', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. )
111	!
112	REWIND( numnam_ref ) ! Namelist namctl in reference namelist : Control prints
113	READ ( numnam_ref, namctl, IOSTAT = ios, ERR = 901 )
114	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namctl in reference namelist', .TRUE. )
115	!
116	REWIND( numnam_cfg ) ! Namelist namctl in confguration namelist
117	READ ( numnam_cfg, namctl, IOSTAT = ios, ERR = 902 )
118	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namctl in configuration namelist', .TRUE. )
119	!
120	REWIND( numnam_ref ) ! Namelist namcfg in reference namelist : Control prints
121	READ ( numnam_ref, namcfg, IOSTAT = ios, ERR = 903 )
122	903 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namcfg in reference namelist', .TRUE. )
123
124	REWIND( numnam_cfg ) ! Namelist namcfg in confguration namelist : Control prints & Benchmark
125	READ ( numnam_cfg, namcfg, IOSTAT = ios, ERR = 904 )
126	904 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namcfg in configuration namelist', .TRUE. )
127
128	! !--------------------------!
129	! ! Set global domain size ! (control print return in cltxt2)
130	! !--------------------------!
131	IF( ln_read_cfg ) THEN ! Read sizes in domain configuration file
132	CALL domain_cfg ( cltxt2, cn_cfg, nn_cfg, jpiglo, jpjglo, jpkglo, jperio )
133	!
134	ELSE ! user-defined namelist
135	CALL usr_def_nam( cltxt2, clnam, cn_cfg, nn_cfg, jpiglo, jpjglo, jpkglo, jperio )
136	ENDIF
137	!
138	jpk = jpkglo
139	!
140	#if defined key_agrif
141	IF( .NOT. Agrif_Root() ) THEN ! AGRIF children: specific setting (cf. agrif_user.F90)
142	jpiglo = nbcellsx + 2 + 2*nbghostcells
143	jpjglo = nbcellsy + 2 + 2*nbghostcells
144	jpi = ( jpiglo-2jpreci + (jpni-1+0) ) / jpni + 2jpreci
145	jpj = ( jpjglo-2jprecj + (jpnj-1+0) ) / jpnj + 2jprecj
146	nperio = 0
147	jperio = 0
148	ln_use_jattr = .false.
149	ENDIF
150	#endif
151	!
152	! !--------------------------------------------!
153	! ! set communicator & select the local node !
154	! ! NB: mynode also opens output.namelist.dyn !
155	! ! on unit number numond on first proc !
156	! !--------------------------------------------!
157	#if defined key_iomput
158	IF( Agrif_Root() ) THEN
159	IF( lk_oasis ) THEN
160	CALL cpl_init( "oceanx", ilocal_comm ) ! nemo local communicator given by oasis
161	CALL xios_initialize( "not used",local_comm=ilocal_comm ) ! send nemo communicator to xios
162	ELSE
163	CALL xios_initialize( "for_xios_mpi_id",return_comm=ilocal_comm ) ! nemo local communicator given by xios
164	ENDIF
165	ENDIF
166	! Nodes selection (control print return in cltxt)
167	narea = mynode( cltxt, 'output.namelist.dyn', numnam_ref, numnam_cfg, numond , nstop, ilocal_comm )
168	#else
169	IF( lk_oasis ) THEN
170	IF( Agrif_Root() ) THEN
171	CALL cpl_init( "oceanx", ilocal_comm ) ! nemo local communicator given by oasis
172	ENDIF
173	! Nodes selection (control print return in cltxt)
174	narea = mynode( cltxt, 'output.namelist.dyn', numnam_ref, numnam_cfg, numond , nstop, ilocal_comm )
175	ELSE
176	ilocal_comm = 0
177	! Nodes selection (control print return in cltxt)
178	narea = mynode( cltxt, 'output.namelist.dyn', numnam_ref, numnam_cfg, numond , nstop )
179	ENDIF
180	#endif
181
182	narea = narea + 1 ! mynode return the rank of proc (0 --> jpnij -1 )
183
184	lwm = (narea == 1) ! control of output namelists
185	lwp = (narea == 1) .OR. ln_ctl ! control of all listing output print
186
187	IF(lwm) THEN
188	! write merged namelists from earlier to output namelist now that the
189	! file has been opened in call to mynode. nammpp has already been
190	! written in mynode (if lk_mpp_mpi)
191	WRITE( numond, namctl )
192	WRITE( numond, namcfg )
193	IF( .NOT.ln_read_cfg ) THEN
194	DO ji = 1, SIZE(clnam)
195	IF( TRIM(clnam(ji)) /= '' ) WRITE(numond, * ) clnam(ji) ! namusr_def print
196	END DO
197	ENDIF
198	ENDIF
199
200	! If dimensions of processor grid weren't specified in the namelist file
201	! then we calculate them here now that we have our communicator size
202	IF( jpni < 1 .OR. jpnj < 1 ) THEN
203	#if defined key_mpp_mpi
204	IF( Agrif_Root() ) CALL nemo_partition( mppsize )
205	#else
206	jpni = 1
207	jpnj = 1
208	jpnij = jpni*jpnj
209	#endif
210	ENDIF
211
212	IF( Agrif_Root() ) THEN ! AGRIF mother: specific setting from jpni and jpnj
213	#if defined key_nemocice_decomp
214	jpi = ( nx_global+2-2jpreci + (jpni-1) ) / jpni + 2jpreci ! first dim.
215	jpj = ( ny_global+2-2jprecj + (jpnj-1) ) / jpnj + 2jprecj ! second dim.
216	#else
217	jpi = ( jpiglo -2jpreci + (jpni-1) ) / jpni + 2jpreci ! first dim.
218	jpj = ( jpjglo -2jprecj + (jpnj-1) ) / jpnj + 2jprecj ! second dim.
219	#endif
220	ENDIF
221
222	!!gm ??? why here it has already been done in line 301 !
223	jpk = jpkglo ! third dim
224	!!gm end
225	jpim1 = jpi-1 ! inner domain indices
226	jpjm1 = jpj-1 ! " "
227	jpkm1 = jpk-1 ! " "
228	jpij = jpi*jpj ! jpi x j
229
230	IF(lwp) THEN ! open listing units
231	!
232	CALL ctl_opn( numout, 'ocean.output', 'REPLACE', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE., narea )
233	!
234	WRITE(numout,*)
235	WRITE(numout,*) ' CNRS - NERC - Met OFFICE - MERCATOR-ocean - INGV - CMCC'
236	WRITE(numout,*) ' NEMO team'
237	WRITE(numout,*) ' Stand Alone Observation operator'
238	WRITE(numout,*) ' NEMO version 3.7 (2015) '
239	WRITE(numout,*)
240	WRITE(numout,*)
241	DO ji = 1, SIZE(cltxt)
242	IF( TRIM(cltxt (ji)) /= '' ) WRITE(numout,*) cltxt(ji) ! control print of mynode
243	END DO
244	WRITE(numout,*)
245	WRITE(numout,*)
246	DO ji = 1, SIZE(cltxt2)
247	IF( TRIM(cltxt2(ji)) /= '' ) WRITE(numout,*) cltxt2(ji) ! control print of domain size
248	END DO
249	!
250	WRITE(numout,cform_aaa) ! Flag AAAAAAA
251	!
252	ENDIF
253
254	! Now we know the dimensions of the grid and numout has been set: we can allocate arrays
255	CALL nemo_alloc()
256
257	! !-------------------------------!
258	! ! NEMO general initialization !
259	! !-------------------------------!
260
261	CALL nemo_ctl ! Control prints & Benchmark
262
263	! ! Domain decomposition
264	CALL mpp_init
265	!
266	IF( nn_timing == 1 ) CALL timing_init
267	!
268	! ! General initialization
269	CALL phy_cst ! Physical constants
270	CALL eos_init ! Equation of state
271	CALL dom_init ! Domain
272
273	IF( ln_nnogather ) CALL nemo_northcomms ! Initialise the northfold neighbour lists (must be done after the masks are defined)
274
275	IF( ln_ctl ) CALL prt_ctl_init ! Print control
276
277	CALL istate_init ! ocean initial state (Dynamics and tracers)
278	END SUBROUTINE nemo_init
279
280
281	SUBROUTINE nemo_ctl
282	!!----------------------------------------------------------------------
283	!! * ROUTINE nemo_ctl *
284	!!
285	!! ** Purpose : control print setting
286	!!
287	!! ** Method : - print namctl information and check some consistencies
288	!!----------------------------------------------------------------------
289	!
290	IF(lwp) THEN ! control print
291	WRITE(numout,*)
292	WRITE(numout,*) 'nemo_ctl: Control prints'
293	WRITE(numout,*) '~~~~~~~ '
294	WRITE(numout,*) ' Namelist namctl'
295	WRITE(numout,*) ' run control (for debugging) ln_ctl = ', ln_ctl
296	WRITE(numout,*) ' level of print nn_print = ', nn_print
297	WRITE(numout,*) ' Start i indice for SUM control nn_ictls = ', nn_ictls
298	WRITE(numout,*) ' End i indice for SUM control nn_ictle = ', nn_ictle
299	WRITE(numout,*) ' Start j indice for SUM control nn_jctls = ', nn_jctls
300	WRITE(numout,*) ' End j indice for SUM control nn_jctle = ', nn_jctle
301	WRITE(numout,*) ' number of proc. following i nn_isplt = ', nn_isplt
302	WRITE(numout,*) ' number of proc. following j nn_jsplt = ', nn_jsplt
303	WRITE(numout,*) ' timing activated (0/1) nn_timing = ', nn_timing
304	ENDIF
305	!
306	nprint = nn_print ! convert DOCTOR namelist names into OLD names
307	nictls = nn_ictls
308	nictle = nn_ictle
309	njctls = nn_jctls
310	njctle = nn_jctle
311	isplt = nn_isplt
312	jsplt = nn_jsplt
313
314	IF(lwp) THEN ! control print
315	WRITE(numout,*)
316	WRITE(numout,*) 'namcfg : configuration initialization through namelist read'
317	WRITE(numout,*) '~~~~~~~ '
318	WRITE(numout,*) ' Namelist namcfg'
319	WRITE(numout,*) ' read domain configuration file ln_read_cfg = ', ln_read_cfg
320	WRITE(numout,*) ' filename to be read cn_domcfg = ', TRIM(cn_domcfg)
321	WRITE(numout,*) ' write configuration definition file ln_write_cfg = ', ln_write_cfg
322	WRITE(numout,*) ' filename to be written cn_domcfg_out = ', TRIM(cn_domcfg_out)
323	WRITE(numout,*) ' use file attribute if exists as i/p j-start ln_use_jattr = ', ln_use_jattr
324	ENDIF
325	! ! Parameter control
326	!
327	IF( ln_ctl ) THEN ! sub-domain area indices for the control prints
328	IF( lk_mpp .AND. jpnij > 1 ) THEN
329	isplt = jpni ; jsplt = jpnj ; ijsplt = jpni*jpnj ! the domain is forced to the real split domain
330	ELSE
331	IF( isplt == 1 .AND. jsplt == 1 ) THEN
332	CALL ctl_warn( ' - isplt & jsplt are equal to 1', &
333	& ' - the print control will be done over the whole domain' )
334	ENDIF
335	ijsplt = isplt * jsplt ! total number of processors ijsplt
336	ENDIF
337	IF(lwp) WRITE(numout,*)' - The total number of processors over which the'
338	IF(lwp) WRITE(numout,*)' print control will be done is ijsplt : ', ijsplt
339	!
340	! ! indices used for the SUM control
341	IF( nictls+nictle+njctls+njctle == 0 ) THEN ! print control done over the default area
342	lsp_area = .FALSE.
343	ELSE ! print control done over a specific area
344	lsp_area = .TRUE.
345	IF( nictls < 1 .OR. nictls > jpiglo ) THEN
346	CALL ctl_warn( ' - nictls must be 1<=nictls>=jpiglo, it is forced to 1' )
347	nictls = 1
348	ENDIF
349	IF( nictle < 1 .OR. nictle > jpiglo ) THEN
350	CALL ctl_warn( ' - nictle must be 1<=nictle>=jpiglo, it is forced to jpiglo' )
351	nictle = jpiglo
352	ENDIF
353	IF( njctls < 1 .OR. njctls > jpjglo ) THEN
354	CALL ctl_warn( ' - njctls must be 1<=njctls>=jpjglo, it is forced to 1' )
355	njctls = 1
356	ENDIF
357	IF( njctle < 1 .OR. njctle > jpjglo ) THEN
358	CALL ctl_warn( ' - njctle must be 1<=njctle>=jpjglo, it is forced to jpjglo' )
359	njctle = jpjglo
360	ENDIF
361	ENDIF
362	ENDIF
363	!
364	IF( 1_wp /= SIGN(1._wp,-0._wp) ) CALL ctl_stop( 'nemo_ctl: The intrinsec SIGN function follows ', &
365	& 'f2003 standard. ' , &
366	& 'Compile with key_nosignedzero enabled' )
367	!
368	END SUBROUTINE nemo_ctl
369
370
371	SUBROUTINE nemo_closefile
372	!!----------------------------------------------------------------------
373	!! * ROUTINE nemo_closefile *
374	!!
375	!! ** Purpose : Close the files
376	!!----------------------------------------------------------------------
377	!
378	IF( lk_mpp ) CALL mppsync
379	!
380	CALL iom_close ! close all input/output files managed by iom_*
381	!
382	IF( numstp /= -1 ) CLOSE( numstp ) ! time-step file
383	IF( numsol /= -1 ) CLOSE( numsol ) ! solver file
384	IF( numnam_ref /= -1 ) CLOSE( numnam_ref ) ! oce reference namelist
385	IF( numnam_cfg /= -1 ) CLOSE( numnam_cfg ) ! oce configuration namelist
386	IF( lwm.AND.numond /= -1 ) CLOSE( numond ) ! oce output namelist
387	IF( numnam_ice_ref /= -1 ) CLOSE( numnam_ice_ref ) ! ice reference namelist
388	IF( numnam_ice_cfg /= -1 ) CLOSE( numnam_ice_cfg ) ! ice configuration namelist
389	IF( lwm.AND.numoni /= -1 ) CLOSE( numoni ) ! ice output namelist
390	IF( numevo_ice /= -1 ) CLOSE( numevo_ice ) ! ice variables (temp. evolution)
391	IF( numout /= 6 ) CLOSE( numout ) ! standard model output file
392	IF( numdct_vol /= -1 ) CLOSE( numdct_vol ) ! volume transports
393	IF( numdct_heat /= -1 ) CLOSE( numdct_heat ) ! heat transports
394	IF( numdct_salt /= -1 ) CLOSE( numdct_salt ) ! salt transports
395	!
396	numout = 6 ! redefine numout in case it is used after this point...
397	!
398	END SUBROUTINE nemo_closefile
399
400
401	SUBROUTINE nemo_alloc
402	!!----------------------------------------------------------------------
403	!! * ROUTINE nemo_alloc *
404	!!
405	!! ** Purpose : Allocate all the dynamic arrays of the OPA modules
406	!!
407	!! ** Method :
408	!!----------------------------------------------------------------------
409	USE diawri , ONLY: dia_wri_alloc
410	USE dom_oce , ONLY: dom_oce_alloc
411	!
412	INTEGER :: ierr
413	!!----------------------------------------------------------------------
414	!
415	ierr = oce_alloc () ! ocean
416	ierr = ierr + dia_wri_alloc ()
417	ierr = ierr + dom_oce_alloc () ! ocean domain
418	!
419	IF( lk_mpp ) CALL mpp_sum( ierr )
420	IF( ierr /= 0 ) CALL ctl_stop( 'STOP', 'nemo_alloc : unable to allocate standard ocean arrays' )
421	!
422	END SUBROUTINE nemo_alloc
423
424
425	SUBROUTINE nemo_partition( num_pes )
426	!!----------------------------------------------------------------------
427	!! * ROUTINE nemo_partition *
428	!!
429	!! ** Purpose :
430	!!
431	!! ** Method :
432	!!----------------------------------------------------------------------
433	INTEGER, INTENT(in) :: num_pes ! The number of MPI processes we have
434	!
435	INTEGER, PARAMETER :: nfactmax = 20
436	INTEGER :: nfact ! The no. of factors returned
437	INTEGER :: ierr ! Error flag
438	INTEGER :: ji
439	INTEGER :: idiff, mindiff, imin ! For choosing pair of factors that are closest in value
440	INTEGER, DIMENSION(nfactmax) :: ifact ! Array of factors
441	!!----------------------------------------------------------------------
442	!
443	ierr = 0
444	!
445	CALL factorise( ifact, nfactmax, nfact, num_pes, ierr )
446	!
447	IF( nfact <= 1 ) THEN
448	WRITE (numout, *) 'WARNING: factorisation of number of PEs failed'
449	WRITE (numout, *) ' : using grid of ',num_pes,' x 1'
450	jpnj = 1
451	jpni = num_pes
452	ELSE
453	! Search through factors for the pair that are closest in value
454	mindiff = 1000000
455	imin = 1
456	DO ji = 1, nfact-1, 2
457	idiff = ABS( ifact(ji) - ifact(ji+1) )
458	IF( idiff < mindiff ) THEN
459	mindiff = idiff
460	imin = ji
461	ENDIF
462	END DO
463	jpnj = ifact(imin)
464	jpni = ifact(imin + 1)
465	ENDIF
466	!
467	jpnij = jpni*jpnj
468	!
469	END SUBROUTINE nemo_partition
470
471
472	SUBROUTINE factorise( kfax, kmaxfax, knfax, kn, kerr )
473	!!----------------------------------------------------------------------
474	!! * ROUTINE factorise *
475	!!
476	!! ** Purpose : return the prime factors of n.
477	!! knfax factors are returned in array kfax which is of
478	!! maximum dimension kmaxfax.
479	!! ** Method :
480	!!----------------------------------------------------------------------
481	INTEGER , INTENT(in ) :: kn, kmaxfax
482	INTEGER , INTENT( out) :: kerr, knfax
483	INTEGER, DIMENSION(kmaxfax), INTENT( out) :: kfax
484	!
485	INTEGER :: ifac, jl, inu
486	INTEGER, PARAMETER :: ntest = 14
487	INTEGER, DIMENSION(ntest) :: ilfax
488	!!----------------------------------------------------------------------
489	!
490	! lfax contains the set of allowed factors.
491	ilfax(:) = (/(2**jl,jl=ntest,1,-1)/)
492	!
493	! Clear the error flag and initialise output vars
494	kerr = 0
495	kfax = 1
496	knfax = 0
497	!
498	! Find the factors of n.
499	IF( kn == 1 ) GOTO 20
500
501	! nu holds the unfactorised part of the number.
502	! knfax holds the number of factors found.
503	! l points to the allowed factor list.
504	! ifac holds the current factor.
505	!
506	inu = kn
507	knfax = 0
508	!
509	DO jl = ntest, 1, -1
510	!
511	ifac = ilfax(jl)
512	IF( ifac > inu ) CYCLE
513
514	! Test whether the factor will divide.
515
516	IF( MOD(inu,ifac) == 0 ) THEN
517	!
518	knfax = knfax + 1 ! Add the factor to the list
519	IF( knfax > kmaxfax ) THEN
520	kerr = 6
521	write (,) 'FACTOR: insufficient space in factor array ', knfax
522	return
523	ENDIF
524	kfax(knfax) = ifac
525	! Store the other factor that goes with this one
526	knfax = knfax + 1
527	kfax(knfax) = inu / ifac
528	!WRITE (,) 'ARPDBG, factors ',knfax-1,' & ',knfax,' are ', kfax(knfax-1),' and ',kfax(knfax)
529	ENDIF
530	!
531	END DO
532	!
533	20 CONTINUE ! Label 20 is the exit point from the factor search loop.
534	!
535	END SUBROUTINE factorise
536
537	#if defined key_mpp_mpi
538
539	SUBROUTINE nemo_northcomms
540	!!----------------------------------------------------------------------
541	!! * ROUTINE nemo_northcomms *
542	!! ** Purpose : Setup for north fold exchanges with explicit
543	!! point-to-point messaging
544	!!
545	!! ** Method : Initialization of the northern neighbours lists.
546	!!----------------------------------------------------------------------
547	!! 1.0 ! 2011-10 (A. C. Coward, NOCS & J. Donners, PRACE)
548	!! 2.0 ! 2013-06 Setup avoiding MPI communication (I. Epicoco, S. Mocavero, CMCC)
549	!!----------------------------------------------------------------------
550	INTEGER :: sxM, dxM, sxT, dxT, jn
551	INTEGER :: njmppmax
552	!!----------------------------------------------------------------------
553	!
554	njmppmax = MAXVAL( njmppt )
555	!
556	!initializes the north-fold communication variables
557	isendto(:) = 0
558	nsndto = 0
559	!
560	!if I am a process in the north
561	IF ( njmpp == njmppmax ) THEN
562	!sxM is the first point (in the global domain) needed to compute the
563	!north-fold for the current process
564	sxM = jpiglo - nimppt(narea) - nlcit(narea) + 1
565	!dxM is the last point (in the global domain) needed to compute the
566	!north-fold for the current process
567	dxM = jpiglo - nimppt(narea) + 2
568
569	!loop over the other north-fold processes to find the processes
570	!managing the points belonging to the sxT-dxT range
571
572	DO jn = 1, jpni
573	!sxT is the first point (in the global domain) of the jn
574	!process
575	sxT = nfiimpp(jn, jpnj)
576	!dxT is the last point (in the global domain) of the jn
577	!process
578	dxT = nfiimpp(jn, jpnj) + nfilcit(jn, jpnj) - 1
579	IF ((sxM .gt. sxT) .AND. (sxM .lt. dxT)) THEN
580	nsndto = nsndto + 1
581	isendto(nsndto) = jn
582	ELSEIF ((sxM .le. sxT) .AND. (dxM .ge. dxT)) THEN
583	nsndto = nsndto + 1
584	isendto(nsndto) = jn
585	ELSEIF ((dxM .lt. dxT) .AND. (sxT .lt. dxM)) THEN
586	nsndto = nsndto + 1
587	isendto(nsndto) = jn
588	ENDIF
589	END DO
590	nfsloop = 1
591	nfeloop = nlci
592	DO jn = 2,jpni-1
593	IF(nfipproc(jn,jpnj) .eq. (narea - 1)) THEN
594	IF (nfipproc(jn - 1 ,jpnj) .eq. -1) THEN
595	nfsloop = nldi
596	ENDIF
597	IF (nfipproc(jn + 1,jpnj) .eq. -1) THEN
598	nfeloop = nlei
599	ENDIF
600	ENDIF
601	END DO
602
603	ENDIF
604	l_north_nogather = .TRUE.
605	END SUBROUTINE nemo_northcomms
606
607	#else
608	SUBROUTINE nemo_northcomms ! Dummy routine
609	WRITE(,) 'nemo_northcomms: You should not have seen this print! error?'
610	END SUBROUTINE nemo_northcomms
611	#endif
612
613	!!======================================================================
614	END MODULE nemogcm
615

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source: branches/2017/dev_r8126_ROBUST10_MPPINI/NEMOGCM/NEMO/SAO_SRC/nemogcm.F90 @ 8219

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