1 |
!! do_Forces.F90 |
2 |
!! module do_Forces |
3 |
!! Calculates Long Range forces. |
4 |
|
5 |
!! @author Charles F. Vardeman II |
6 |
!! @author Matthew Meineke |
7 |
!! @version $Id: do_Forces.F90,v 1.44 2004-01-05 22:49:14 chuckv Exp $, $Date: 2004-01-05 22:49:14 $, $Name: not supported by cvs2svn $, $Revision: 1.44 $ |
8 |
|
9 |
module do_Forces |
10 |
use force_globals |
11 |
use simulation |
12 |
use definitions |
13 |
use atype_module |
14 |
use neighborLists |
15 |
use lj |
16 |
use sticky_pair |
17 |
use dipole_dipole |
18 |
use reaction_field |
19 |
use gb_pair |
20 |
use vector_class |
21 |
use eam |
22 |
use status |
23 |
#ifdef IS_MPI |
24 |
use mpiSimulation |
25 |
#endif |
26 |
|
27 |
implicit none |
28 |
PRIVATE |
29 |
|
30 |
#define __FORTRAN90 |
31 |
#include "fForceField.h" |
32 |
|
33 |
logical, save :: do_forces_initialized = .false., haveRlist = .false. |
34 |
logical, save :: havePolicies = .false. |
35 |
logical, save :: FF_uses_LJ |
36 |
logical, save :: FF_uses_sticky |
37 |
logical, save :: FF_uses_dipoles |
38 |
logical, save :: FF_uses_RF |
39 |
logical, save :: FF_uses_GB |
40 |
logical, save :: FF_uses_EAM |
41 |
|
42 |
real(kind=dp), save :: rlist, rlistsq |
43 |
|
44 |
public :: init_FF |
45 |
public :: do_force_loop |
46 |
public :: setRlistDF |
47 |
|
48 |
#ifdef PROFILE |
49 |
public :: getforcetime |
50 |
real, save :: forceTime = 0 |
51 |
real :: forceTimeInitial, forceTimeFinal |
52 |
integer :: nLoops |
53 |
#endif |
54 |
|
55 |
logical, allocatable :: propertyMapI(:,:) |
56 |
logical, allocatable :: propertyMapJ(:,:) |
57 |
|
58 |
contains |
59 |
|
60 |
subroutine setRlistDF( this_rlist ) |
61 |
|
62 |
real(kind=dp) :: this_rlist |
63 |
|
64 |
rlist = this_rlist |
65 |
rlistsq = rlist * rlist |
66 |
|
67 |
haveRlist = .true. |
68 |
if( havePolicies ) do_forces_initialized = .true. |
69 |
|
70 |
end subroutine setRlistDF |
71 |
|
72 |
subroutine init_FF(LJMIXPOLICY, use_RF_c, thisStat) |
73 |
|
74 |
integer, intent(in) :: LJMIXPOLICY |
75 |
logical, intent(in) :: use_RF_c |
76 |
|
77 |
integer, intent(out) :: thisStat |
78 |
integer :: my_status, nMatches |
79 |
integer, pointer :: MatchList(:) => null() |
80 |
real(kind=dp) :: rcut, rrf, rt, dielect |
81 |
|
82 |
!! assume things are copacetic, unless they aren't |
83 |
thisStat = 0 |
84 |
|
85 |
!! Fortran's version of a cast: |
86 |
FF_uses_RF = use_RF_c |
87 |
|
88 |
!! init_FF is called *after* all of the atom types have been |
89 |
!! defined in atype_module using the new_atype subroutine. |
90 |
!! |
91 |
!! this will scan through the known atypes and figure out what |
92 |
!! interactions are used by the force field. |
93 |
|
94 |
FF_uses_LJ = .false. |
95 |
FF_uses_sticky = .false. |
96 |
FF_uses_dipoles = .false. |
97 |
FF_uses_GB = .false. |
98 |
FF_uses_EAM = .false. |
99 |
|
100 |
call getMatchingElementList(atypes, "is_LJ", .true., nMatches, MatchList) |
101 |
if (nMatches .gt. 0) FF_uses_LJ = .true. |
102 |
|
103 |
call getMatchingElementList(atypes, "is_DP", .true., nMatches, MatchList) |
104 |
if (nMatches .gt. 0) FF_uses_dipoles = .true. |
105 |
|
106 |
call getMatchingElementList(atypes, "is_Sticky", .true., nMatches, & |
107 |
MatchList) |
108 |
if (nMatches .gt. 0) FF_uses_Sticky = .true. |
109 |
|
110 |
call getMatchingElementList(atypes, "is_GB", .true., nMatches, MatchList) |
111 |
if (nMatches .gt. 0) FF_uses_GB = .true. |
112 |
|
113 |
call getMatchingElementList(atypes, "is_EAM", .true., nMatches, MatchList) |
114 |
if (nMatches .gt. 0) FF_uses_EAM = .true. |
115 |
|
116 |
!! check to make sure the FF_uses_RF setting makes sense |
117 |
|
118 |
if (FF_uses_dipoles) then |
119 |
if (FF_uses_RF) then |
120 |
dielect = getDielect() |
121 |
call initialize_rf(dielect) |
122 |
endif |
123 |
else |
124 |
if (FF_uses_RF) then |
125 |
write(default_error,*) 'Using Reaction Field with no dipoles? Huh?' |
126 |
thisStat = -1 |
127 |
return |
128 |
endif |
129 |
endif |
130 |
|
131 |
if (FF_uses_LJ) then |
132 |
|
133 |
select case (LJMIXPOLICY) |
134 |
case (LB_MIXING_RULE) |
135 |
call init_lj_FF(LB_MIXING_RULE, my_status) |
136 |
case (EXPLICIT_MIXING_RULE) |
137 |
call init_lj_FF(EXPLICIT_MIXING_RULE, my_status) |
138 |
case default |
139 |
write(default_error,*) 'unknown LJ Mixing Policy!' |
140 |
thisStat = -1 |
141 |
return |
142 |
end select |
143 |
if (my_status /= 0) then |
144 |
thisStat = -1 |
145 |
return |
146 |
end if |
147 |
endif |
148 |
|
149 |
if (FF_uses_sticky) then |
150 |
call check_sticky_FF(my_status) |
151 |
if (my_status /= 0) then |
152 |
thisStat = -1 |
153 |
return |
154 |
end if |
155 |
endif |
156 |
|
157 |
|
158 |
if (FF_uses_EAM) then |
159 |
call init_EAM_FF(my_status) |
160 |
if (my_status /= 0) then |
161 |
write(*,*) "init_EAM_FF returned a bad status" |
162 |
thisStat = -1 |
163 |
return |
164 |
end if |
165 |
endif |
166 |
|
167 |
|
168 |
|
169 |
if (FF_uses_GB) then |
170 |
call check_gb_pair_FF(my_status) |
171 |
if (my_status .ne. 0) then |
172 |
thisStat = -1 |
173 |
return |
174 |
endif |
175 |
endif |
176 |
|
177 |
if (FF_uses_GB .and. FF_uses_LJ) then |
178 |
endif |
179 |
if (.not. do_forces_initialized) then |
180 |
!! Create neighbor lists |
181 |
call expandNeighborList(nLocal, my_status) |
182 |
if (my_Status /= 0) then |
183 |
write(default_error,*) "SimSetup: ExpandNeighborList returned error." |
184 |
thisStat = -1 |
185 |
return |
186 |
endif |
187 |
endif |
188 |
|
189 |
|
190 |
havePolicies = .true. |
191 |
if( haveRlist ) do_forces_initialized = .true. |
192 |
|
193 |
end subroutine init_FF |
194 |
|
195 |
|
196 |
!! Does force loop over i,j pairs. Calls do_pair to calculates forces. |
197 |
!-------------------------------------------------------------> |
198 |
subroutine do_force_loop(q, A, u_l, f, t, tau, pot, do_pot_c, do_stress_c, & |
199 |
error) |
200 |
!! Position array provided by C, dimensioned by getNlocal |
201 |
real ( kind = dp ), dimension(3,nLocal) :: q |
202 |
!! Rotation Matrix for each long range particle in simulation. |
203 |
real( kind = dp), dimension(9,nLocal) :: A |
204 |
!! Unit vectors for dipoles (lab frame) |
205 |
real( kind = dp ), dimension(3,nLocal) :: u_l |
206 |
!! Force array provided by C, dimensioned by getNlocal |
207 |
real ( kind = dp ), dimension(3,nLocal) :: f |
208 |
!! Torsion array provided by C, dimensioned by getNlocal |
209 |
real( kind = dp ), dimension(3,nLocal) :: t |
210 |
|
211 |
!! Stress Tensor |
212 |
real( kind = dp), dimension(9) :: tau |
213 |
real ( kind = dp ) :: pot |
214 |
logical ( kind = 2) :: do_pot_c, do_stress_c |
215 |
logical :: do_pot |
216 |
logical :: do_stress |
217 |
#ifdef IS_MPI |
218 |
real( kind = DP ) :: pot_local |
219 |
integer :: nrow |
220 |
integer :: ncol |
221 |
integer :: nprocs |
222 |
#endif |
223 |
integer :: natoms |
224 |
logical :: update_nlist |
225 |
integer :: i, j, jbeg, jend, jnab |
226 |
integer :: nlist |
227 |
real( kind = DP ) :: rijsq |
228 |
real(kind=dp),dimension(3) :: d |
229 |
real(kind=dp) :: rfpot, mu_i, virial |
230 |
integer :: me_i, me_j |
231 |
logical :: is_dp_i |
232 |
integer :: neighborListSize |
233 |
integer :: listerror, error |
234 |
integer :: localError |
235 |
integer :: propPack_i, propPack_j |
236 |
|
237 |
real(kind=dp) :: listSkin = 1.0 |
238 |
|
239 |
!! initialize local variables |
240 |
|
241 |
#ifdef IS_MPI |
242 |
pot_local = 0.0_dp |
243 |
nrow = getNrow(plan_row) |
244 |
ncol = getNcol(plan_col) |
245 |
#else |
246 |
natoms = nlocal |
247 |
#endif |
248 |
|
249 |
call check_initialization(localError) |
250 |
if ( localError .ne. 0 ) then |
251 |
call handleError("do_force_loop","Not Initialized") |
252 |
error = -1 |
253 |
return |
254 |
end if |
255 |
call zero_work_arrays() |
256 |
|
257 |
do_pot = do_pot_c |
258 |
do_stress = do_stress_c |
259 |
|
260 |
|
261 |
#ifdef IS_MPI |
262 |
if (.not.allocated(propertyMapI)) then |
263 |
allocate(propertyMapI(5,nrow)) |
264 |
endif |
265 |
|
266 |
do i = 1, nrow |
267 |
me_i = atid_row(i) |
268 |
#else |
269 |
if (.not.allocated(propertyMapI)) then |
270 |
allocate(propertyMapI(5,nlocal)) |
271 |
endif |
272 |
|
273 |
do i = 1, natoms |
274 |
me_i = atid(i) |
275 |
#endif |
276 |
|
277 |
propertyMapI(1:5,i) = .false. |
278 |
|
279 |
call getElementProperty(atypes, me_i, "propertyPack", propPack_i) |
280 |
|
281 |
! unpack the properties |
282 |
|
283 |
if (iand(propPack_i, LJ_PROPERTY_MASK) .eq. LJ_PROPERTY_MASK) & |
284 |
propertyMapI(1, i) = .true. |
285 |
if (iand(propPack_i, DP_PROPERTY_MASK) .eq. DP_PROPERTY_MASK) & |
286 |
propertyMapI(2, i) = .true. |
287 |
if (iand(propPack_i, STICKY_PROPERTY_MASK) .eq. STICKY_PROPERTY_MASK) & |
288 |
propertyMapI(3, i) = .true. |
289 |
if (iand(propPack_i, GB_PROPERTY_MASK) .eq. GB_PROPERTY_MASK) & |
290 |
propertyMapI(4, i) = .true. |
291 |
if (iand(propPack_i, EAM_PROPERTY_MASK) .eq. EAM_PROPERTY_MASK) & |
292 |
propertyMapI(5, i) = .true. |
293 |
|
294 |
end do |
295 |
|
296 |
#ifdef IS_MPI |
297 |
if (.not.allocated(propertyMapJ)) then |
298 |
allocate(propertyMapJ(5,ncol)) |
299 |
endif |
300 |
|
301 |
do j = 1, ncol |
302 |
me_j = atid_col(j) |
303 |
#else |
304 |
if (.not.allocated(propertyMapJ)) then |
305 |
allocate(propertyMapJ(5,nlocal)) |
306 |
endif |
307 |
|
308 |
do j = 1, natoms |
309 |
me_j = atid(j) |
310 |
#endif |
311 |
|
312 |
propertyMapJ(1:5,j) = .false. |
313 |
|
314 |
call getElementProperty(atypes, me_j, "propertyPack", propPack_j) |
315 |
|
316 |
! unpack the properties |
317 |
|
318 |
if (iand(propPack_j, LJ_PROPERTY_MASK) .eq. LJ_PROPERTY_MASK) & |
319 |
propertyMapJ(1, j) = .true. |
320 |
if (iand(propPack_j, DP_PROPERTY_MASK) .eq. DP_PROPERTY_MASK) & |
321 |
propertyMapJ(2, j) = .true. |
322 |
if (iand(propPack_j, STICKY_PROPERTY_MASK) .eq. STICKY_PROPERTY_MASK) & |
323 |
propertyMapJ(3, j) = .true. |
324 |
if (iand(propPack_j, GB_PROPERTY_MASK) .eq. GB_PROPERTY_MASK) & |
325 |
propertyMapJ(4, j) = .true. |
326 |
if (iand(propPack_j, EAM_PROPERTY_MASK) .eq. EAM_PROPERTY_MASK) & |
327 |
propertyMapJ(5, j) = .true. |
328 |
|
329 |
end do |
330 |
|
331 |
! Gather all information needed by all force loops: |
332 |
|
333 |
#ifdef IS_MPI |
334 |
|
335 |
call gather(q,q_Row,plan_row3d) |
336 |
call gather(q,q_Col,plan_col3d) |
337 |
|
338 |
if (FF_UsesDirectionalAtoms() .and. SimUsesDirectionalAtoms()) then |
339 |
call gather(u_l,u_l_Row,plan_row3d) |
340 |
call gather(u_l,u_l_Col,plan_col3d) |
341 |
|
342 |
call gather(A,A_Row,plan_row_rotation) |
343 |
call gather(A,A_Col,plan_col_rotation) |
344 |
endif |
345 |
|
346 |
#endif |
347 |
|
348 |
!! Begin force loop timing: |
349 |
#ifdef PROFILE |
350 |
call cpu_time(forceTimeInitial) |
351 |
nloops = nloops + 1 |
352 |
#endif |
353 |
|
354 |
if (FF_RequiresPrepairCalc() .and. SimRequiresPrepairCalc()) then |
355 |
!! See if we need to update neighbor lists |
356 |
call checkNeighborList(nlocal, q, listSkin, update_nlist) |
357 |
!! if_mpi_gather_stuff_for_prepair |
358 |
!! do_prepair_loop_if_needed |
359 |
!! if_mpi_scatter_stuff_from_prepair |
360 |
!! if_mpi_gather_stuff_from_prepair_to_main_loop |
361 |
|
362 |
!--------------------PREFORCE LOOP----------->>>>>>>>>>>>>>>>>>>>>>>>>>> |
363 |
#ifdef IS_MPI |
364 |
|
365 |
if (update_nlist) then |
366 |
|
367 |
!! save current configuration, construct neighbor list, |
368 |
!! and calculate forces |
369 |
call saveNeighborList(nlocal, q) |
370 |
|
371 |
neighborListSize = size(list) |
372 |
nlist = 0 |
373 |
|
374 |
do i = 1, nrow |
375 |
point(i) = nlist + 1 |
376 |
|
377 |
prepair_inner: do j = 1, ncol |
378 |
|
379 |
if (skipThisPair(i,j)) cycle prepair_inner |
380 |
|
381 |
call get_interatomic_vector(q_Row(:,i), q_Col(:,j), d, rijsq) |
382 |
|
383 |
if (rijsq < rlistsq) then |
384 |
|
385 |
nlist = nlist + 1 |
386 |
|
387 |
if (nlist > neighborListSize) then |
388 |
call expandNeighborList(nlocal, listerror) |
389 |
if (listerror /= 0) then |
390 |
error = -1 |
391 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
392 |
return |
393 |
end if |
394 |
neighborListSize = size(list) |
395 |
endif |
396 |
|
397 |
list(nlist) = j |
398 |
call do_prepair(i, j, rijsq, d, do_pot, do_stress, u_l, A, f, t, pot_local) |
399 |
endif |
400 |
enddo prepair_inner |
401 |
enddo |
402 |
|
403 |
point(nrow + 1) = nlist + 1 |
404 |
|
405 |
else !! (of update_check) |
406 |
|
407 |
! use the list to find the neighbors |
408 |
do i = 1, nrow |
409 |
JBEG = POINT(i) |
410 |
JEND = POINT(i+1) - 1 |
411 |
! check thiat molecule i has neighbors |
412 |
if (jbeg .le. jend) then |
413 |
|
414 |
do jnab = jbeg, jend |
415 |
j = list(jnab) |
416 |
|
417 |
call get_interatomic_vector(q_Row(:,i), q_Col(:,j), d, rijsq) |
418 |
call do_prepair(i, j, rijsq, d, do_pot, do_stress, & |
419 |
u_l, A, f, t, pot_local) |
420 |
|
421 |
enddo |
422 |
endif |
423 |
enddo |
424 |
endif |
425 |
|
426 |
#else |
427 |
|
428 |
if (update_nlist) then |
429 |
|
430 |
! save current configuration, contruct neighbor list, |
431 |
! and calculate forces |
432 |
call saveNeighborList(natoms, q) |
433 |
|
434 |
neighborListSize = size(list) |
435 |
|
436 |
nlist = 0 |
437 |
|
438 |
do i = 1, natoms-1 |
439 |
point(i) = nlist + 1 |
440 |
|
441 |
prepair_inner: do j = i+1, natoms |
442 |
|
443 |
if (skipThisPair(i,j)) cycle prepair_inner |
444 |
|
445 |
call get_interatomic_vector(q(:,i), q(:,j), d, rijsq) |
446 |
|
447 |
|
448 |
if (rijsq < rlistsq) then |
449 |
|
450 |
|
451 |
nlist = nlist + 1 |
452 |
|
453 |
if (nlist > neighborListSize) then |
454 |
call expandNeighborList(natoms, listerror) |
455 |
if (listerror /= 0) then |
456 |
error = -1 |
457 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
458 |
return |
459 |
end if |
460 |
neighborListSize = size(list) |
461 |
endif |
462 |
|
463 |
list(nlist) = j |
464 |
|
465 |
call do_prepair(i, j, rijsq, d, do_pot, do_stress, & |
466 |
u_l, A, f, t, pot) |
467 |
|
468 |
endif |
469 |
enddo prepair_inner |
470 |
enddo |
471 |
|
472 |
point(natoms) = nlist + 1 |
473 |
|
474 |
else !! (update) |
475 |
|
476 |
! use the list to find the neighbors |
477 |
do i = 1, natoms-1 |
478 |
JBEG = POINT(i) |
479 |
JEND = POINT(i+1) - 1 |
480 |
! check thiat molecule i has neighbors |
481 |
if (jbeg .le. jend) then |
482 |
|
483 |
do jnab = jbeg, jend |
484 |
j = list(jnab) |
485 |
|
486 |
call get_interatomic_vector(q(:,i), q(:,j), d, rijsq) |
487 |
call do_prepair(i, j, rijsq, d, do_pot, do_stress, & |
488 |
u_l, A, f, t, pot) |
489 |
|
490 |
enddo |
491 |
endif |
492 |
enddo |
493 |
endif |
494 |
#endif |
495 |
!! Do rest of preforce calculations |
496 |
!! do necessary preforce calculations |
497 |
call do_preforce(nlocal,pot) |
498 |
! we have already updated the neighbor list set it to false... |
499 |
update_nlist = .false. |
500 |
else |
501 |
!! See if we need to update neighbor lists for non pre-pair |
502 |
call checkNeighborList(nlocal, q, listSkin, update_nlist) |
503 |
endif |
504 |
|
505 |
|
506 |
|
507 |
|
508 |
|
509 |
!---------------------------------MAIN Pair LOOP->>>>>>>>>>>>>>>>>>>>>>>>>>>> |
510 |
|
511 |
|
512 |
|
513 |
|
514 |
|
515 |
#ifdef IS_MPI |
516 |
|
517 |
if (update_nlist) then |
518 |
!! save current configuration, construct neighbor list, |
519 |
!! and calculate forces |
520 |
call saveNeighborList(nlocal, q) |
521 |
|
522 |
neighborListSize = size(list) |
523 |
nlist = 0 |
524 |
|
525 |
do i = 1, nrow |
526 |
|
527 |
point(i) = nlist + 1 |
528 |
|
529 |
inner: do j = 1, ncol |
530 |
|
531 |
if (skipThisPair(i,j)) cycle inner |
532 |
|
533 |
call get_interatomic_vector(q_Row(:,i), q_Col(:,j), d, rijsq) |
534 |
|
535 |
if (rijsq < rlistsq) then |
536 |
|
537 |
nlist = nlist + 1 |
538 |
|
539 |
if (nlist > neighborListSize) then |
540 |
call expandNeighborList(nlocal, listerror) |
541 |
if (listerror /= 0) then |
542 |
error = -1 |
543 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
544 |
return |
545 |
end if |
546 |
neighborListSize = size(list) |
547 |
endif |
548 |
|
549 |
list(nlist) = j |
550 |
|
551 |
call do_pair(i, j, rijsq, d, do_pot, do_stress, & |
552 |
u_l, A, f, t, pot_local) |
553 |
|
554 |
endif |
555 |
enddo inner |
556 |
enddo |
557 |
|
558 |
point(nrow + 1) = nlist + 1 |
559 |
|
560 |
else !! (of update_check) |
561 |
|
562 |
! use the list to find the neighbors |
563 |
do i = 1, nrow |
564 |
JBEG = POINT(i) |
565 |
JEND = POINT(i+1) - 1 |
566 |
! check thiat molecule i has neighbors |
567 |
if (jbeg .le. jend) then |
568 |
|
569 |
do jnab = jbeg, jend |
570 |
j = list(jnab) |
571 |
|
572 |
call get_interatomic_vector(q_Row(:,i), q_Col(:,j), d, rijsq) |
573 |
call do_pair(i, j, rijsq, d, do_pot, do_stress, & |
574 |
u_l, A, f, t, pot_local) |
575 |
|
576 |
enddo |
577 |
endif |
578 |
enddo |
579 |
endif |
580 |
|
581 |
#else |
582 |
|
583 |
if (update_nlist) then |
584 |
|
585 |
! save current configuration, contruct neighbor list, |
586 |
! and calculate forces |
587 |
call saveNeighborList(natoms, q) |
588 |
|
589 |
neighborListSize = size(list) |
590 |
|
591 |
nlist = 0 |
592 |
|
593 |
do i = 1, natoms-1 |
594 |
point(i) = nlist + 1 |
595 |
|
596 |
inner: do j = i+1, natoms |
597 |
|
598 |
if (skipThisPair(i,j)) cycle inner |
599 |
|
600 |
call get_interatomic_vector(q(:,i), q(:,j), d, rijsq) |
601 |
|
602 |
|
603 |
if (rijsq < rlistsq) then |
604 |
|
605 |
nlist = nlist + 1 |
606 |
|
607 |
if (nlist > neighborListSize) then |
608 |
call expandNeighborList(natoms, listerror) |
609 |
if (listerror /= 0) then |
610 |
error = -1 |
611 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
612 |
return |
613 |
end if |
614 |
neighborListSize = size(list) |
615 |
endif |
616 |
|
617 |
list(nlist) = j |
618 |
|
619 |
call do_pair(i, j, rijsq, d, do_pot, do_stress, & |
620 |
u_l, A, f, t, pot) |
621 |
|
622 |
endif |
623 |
enddo inner |
624 |
enddo |
625 |
|
626 |
point(natoms) = nlist + 1 |
627 |
|
628 |
else !! (update) |
629 |
|
630 |
! use the list to find the neighbors |
631 |
do i = 1, natoms-1 |
632 |
JBEG = POINT(i) |
633 |
JEND = POINT(i+1) - 1 |
634 |
! check thiat molecule i has neighbors |
635 |
if (jbeg .le. jend) then |
636 |
|
637 |
do jnab = jbeg, jend |
638 |
j = list(jnab) |
639 |
|
640 |
call get_interatomic_vector(q(:,i), q(:,j), d, rijsq) |
641 |
call do_pair(i, j, rijsq, d, do_pot, do_stress, & |
642 |
u_l, A, f, t, pot) |
643 |
|
644 |
enddo |
645 |
endif |
646 |
enddo |
647 |
endif |
648 |
|
649 |
#endif |
650 |
|
651 |
! phew, done with main loop. |
652 |
|
653 |
!! Do timing |
654 |
#ifdef PROFILE |
655 |
call cpu_time(forceTimeFinal) |
656 |
forceTime = forceTime + forceTimeFinal - forceTimeInitial |
657 |
#endif |
658 |
|
659 |
|
660 |
#ifdef IS_MPI |
661 |
!!distribute forces |
662 |
|
663 |
f_temp = 0.0_dp |
664 |
call scatter(f_Row,f_temp,plan_row3d) |
665 |
do i = 1,nlocal |
666 |
f(1:3,i) = f(1:3,i) + f_temp(1:3,i) |
667 |
end do |
668 |
|
669 |
f_temp = 0.0_dp |
670 |
call scatter(f_Col,f_temp,plan_col3d) |
671 |
do i = 1,nlocal |
672 |
f(1:3,i) = f(1:3,i) + f_temp(1:3,i) |
673 |
end do |
674 |
|
675 |
if (FF_UsesDirectionalAtoms() .and. SimUsesDirectionalAtoms()) then |
676 |
t_temp = 0.0_dp |
677 |
call scatter(t_Row,t_temp,plan_row3d) |
678 |
do i = 1,nlocal |
679 |
t(1:3,i) = t(1:3,i) + t_temp(1:3,i) |
680 |
end do |
681 |
t_temp = 0.0_dp |
682 |
call scatter(t_Col,t_temp,plan_col3d) |
683 |
|
684 |
do i = 1,nlocal |
685 |
t(1:3,i) = t(1:3,i) + t_temp(1:3,i) |
686 |
end do |
687 |
endif |
688 |
|
689 |
if (do_pot) then |
690 |
! scatter/gather pot_row into the members of my column |
691 |
call scatter(pot_Row, pot_Temp, plan_row) |
692 |
|
693 |
! scatter/gather pot_local into all other procs |
694 |
! add resultant to get total pot |
695 |
do i = 1, nlocal |
696 |
pot_local = pot_local + pot_Temp(i) |
697 |
enddo |
698 |
|
699 |
pot_Temp = 0.0_DP |
700 |
|
701 |
call scatter(pot_Col, pot_Temp, plan_col) |
702 |
do i = 1, nlocal |
703 |
pot_local = pot_local + pot_Temp(i) |
704 |
enddo |
705 |
|
706 |
endif |
707 |
#endif |
708 |
|
709 |
if (FF_RequiresPostpairCalc() .and. SimRequiresPostpairCalc()) then |
710 |
|
711 |
if (FF_uses_RF .and. SimUsesRF()) then |
712 |
|
713 |
#ifdef IS_MPI |
714 |
call scatter(rf_Row,rf,plan_row3d) |
715 |
call scatter(rf_Col,rf_Temp,plan_col3d) |
716 |
do i = 1,nlocal |
717 |
rf(1:3,i) = rf(1:3,i) + rf_Temp(1:3,i) |
718 |
end do |
719 |
#endif |
720 |
|
721 |
do i = 1, nLocal |
722 |
|
723 |
rfpot = 0.0_DP |
724 |
#ifdef IS_MPI |
725 |
me_i = atid_row(i) |
726 |
#else |
727 |
me_i = atid(i) |
728 |
#endif |
729 |
call getElementProperty(atypes, me_i, "is_DP", is_DP_i) |
730 |
if ( is_DP_i ) then |
731 |
call getElementProperty(atypes, me_i, "dipole_moment", mu_i) |
732 |
!! The reaction field needs to include a self contribution |
733 |
!! to the field: |
734 |
call accumulate_self_rf(i, mu_i, u_l) |
735 |
!! Get the reaction field contribution to the |
736 |
!! potential and torques: |
737 |
call reaction_field_final(i, mu_i, u_l, rfpot, t, do_pot) |
738 |
#ifdef IS_MPI |
739 |
pot_local = pot_local + rfpot |
740 |
#else |
741 |
pot = pot + rfpot |
742 |
|
743 |
#endif |
744 |
endif |
745 |
enddo |
746 |
endif |
747 |
endif |
748 |
|
749 |
|
750 |
#ifdef IS_MPI |
751 |
|
752 |
if (do_pot) then |
753 |
pot = pot + pot_local |
754 |
!! we assume the c code will do the allreduce to get the total potential |
755 |
!! we could do it right here if we needed to... |
756 |
endif |
757 |
|
758 |
if (do_stress) then |
759 |
call mpi_allreduce(tau_Temp, tau, 9,mpi_double_precision,mpi_sum, & |
760 |
mpi_comm_world,mpi_err) |
761 |
call mpi_allreduce(virial_Temp, virial,1,mpi_double_precision,mpi_sum, & |
762 |
mpi_comm_world,mpi_err) |
763 |
endif |
764 |
|
765 |
#else |
766 |
|
767 |
if (do_stress) then |
768 |
tau = tau_Temp |
769 |
virial = virial_Temp |
770 |
endif |
771 |
|
772 |
#endif |
773 |
|
774 |
|
775 |
|
776 |
end subroutine do_force_loop |
777 |
|
778 |
subroutine do_pair(i, j, rijsq, d, do_pot, do_stress, u_l, A, f, t, pot) |
779 |
|
780 |
real( kind = dp ) :: pot |
781 |
real( kind = dp ), dimension(3,nLocal) :: u_l |
782 |
real (kind=dp), dimension(9,nLocal) :: A |
783 |
real (kind=dp), dimension(3,nLocal) :: f |
784 |
real (kind=dp), dimension(3,nLocal) :: t |
785 |
|
786 |
logical, intent(inout) :: do_pot, do_stress |
787 |
integer, intent(in) :: i, j |
788 |
real ( kind = dp ), intent(inout) :: rijsq |
789 |
real ( kind = dp ) :: r |
790 |
real ( kind = dp ), intent(inout) :: d(3) |
791 |
logical :: is_LJ_i, is_LJ_j |
792 |
logical :: is_DP_i, is_DP_j |
793 |
logical :: is_GB_i, is_GB_j |
794 |
logical :: is_EAM_i,is_EAM_j |
795 |
logical :: is_Sticky_i, is_Sticky_j |
796 |
integer :: me_i, me_j |
797 |
integer :: propPack_i |
798 |
integer :: propPack_j |
799 |
r = sqrt(rijsq) |
800 |
|
801 |
#ifdef IS_MPI |
802 |
if (tagRow(i) .eq. tagColumn(j)) then |
803 |
write(0,*) 'do_pair is doing', i , j, tagRow(i), tagColumn(j) |
804 |
endif |
805 |
|
806 |
me_i = atid_row(i) |
807 |
me_j = atid_col(j) |
808 |
|
809 |
#else |
810 |
|
811 |
me_i = atid(i) |
812 |
me_j = atid(j) |
813 |
|
814 |
#endif |
815 |
|
816 |
if (FF_uses_LJ .and. SimUsesLJ()) then |
817 |
|
818 |
if ( propertyMapI(1, me_i) .and. propertyMapJ(1, me_j) ) & |
819 |
call do_lj_pair(i, j, d, r, rijsq, pot, f, do_pot, do_stress) |
820 |
|
821 |
endif |
822 |
|
823 |
if (FF_uses_dipoles .and. SimUsesDipoles()) then |
824 |
|
825 |
if ( propertyMapI(2, me_i) .and. propertyMapJ(2, me_j)) then |
826 |
call do_dipole_pair(i, j, d, r, rijsq, pot, u_l, f, t, & |
827 |
do_pot, do_stress) |
828 |
if (FF_uses_RF .and. SimUsesRF()) then |
829 |
call accumulate_rf(i, j, r, u_l) |
830 |
call rf_correct_forces(i, j, d, r, u_l, f, do_stress) |
831 |
endif |
832 |
|
833 |
endif |
834 |
endif |
835 |
|
836 |
if (FF_uses_Sticky .and. SimUsesSticky()) then |
837 |
|
838 |
if ( propertyMapI(3, me_i) .and. propertyMapJ(3, me_j)) then |
839 |
call do_sticky_pair(i, j, d, r, rijsq, A, pot, f, t, & |
840 |
do_pot, do_stress) |
841 |
endif |
842 |
endif |
843 |
|
844 |
|
845 |
if (FF_uses_GB .and. SimUsesGB()) then |
846 |
|
847 |
if ( propertyMapI(4, me_i) .and. propertyMapJ(4, me_j)) then |
848 |
call do_gb_pair(i, j, d, r, rijsq, u_l, pot, f, t, & |
849 |
do_pot, do_stress) |
850 |
endif |
851 |
|
852 |
endif |
853 |
|
854 |
|
855 |
|
856 |
if (FF_uses_EAM .and. SimUsesEAM()) then |
857 |
|
858 |
if ( propertyMapI(5, me_i) .and. propertyMapJ(5, me_j)) then |
859 |
call do_eam_pair(i, j, d, r, rijsq, pot, f, do_pot, do_stress) |
860 |
endif |
861 |
|
862 |
endif |
863 |
|
864 |
end subroutine do_pair |
865 |
|
866 |
|
867 |
|
868 |
subroutine do_prepair(i, j, rijsq, d, do_pot, do_stress, u_l, A, f, t, pot) |
869 |
real( kind = dp ) :: pot |
870 |
real( kind = dp ), dimension(3,nLocal) :: u_l |
871 |
real (kind=dp), dimension(9,nLocal) :: A |
872 |
real (kind=dp), dimension(3,nLocal) :: f |
873 |
real (kind=dp), dimension(3,nLocal) :: t |
874 |
|
875 |
logical, intent(inout) :: do_pot, do_stress |
876 |
integer, intent(in) :: i, j |
877 |
real ( kind = dp ), intent(inout) :: rijsq |
878 |
real ( kind = dp ) :: r |
879 |
real ( kind = dp ), intent(inout) :: d(3) |
880 |
|
881 |
logical :: is_EAM_i, is_EAM_j |
882 |
|
883 |
integer :: me_i, me_j |
884 |
|
885 |
r = sqrt(rijsq) |
886 |
|
887 |
|
888 |
#ifdef IS_MPI |
889 |
if (tagRow(i) .eq. tagColumn(j)) then |
890 |
write(0,*) 'do_pair is doing', i , j, tagRow(i), tagColumn(j) |
891 |
endif |
892 |
|
893 |
me_i = atid_row(i) |
894 |
me_j = atid_col(j) |
895 |
|
896 |
#else |
897 |
|
898 |
me_i = atid(i) |
899 |
me_j = atid(j) |
900 |
|
901 |
#endif |
902 |
|
903 |
if (FF_uses_EAM .and. SimUsesEAM()) then |
904 |
call getElementProperty(atypes, me_i, "is_EAM", is_EAM_i) |
905 |
call getElementProperty(atypes, me_j, "is_EAM", is_EAM_j) |
906 |
|
907 |
if ( is_EAM_i .and. is_EAM_j ) & |
908 |
call calc_EAM_prepair_rho(i, j, d, r, rijsq ) |
909 |
endif |
910 |
|
911 |
end subroutine do_prepair |
912 |
|
913 |
|
914 |
|
915 |
|
916 |
subroutine do_preforce(nlocal,pot) |
917 |
integer :: nlocal |
918 |
real( kind = dp ) :: pot |
919 |
|
920 |
if (FF_uses_EAM .and. SimUsesEAM()) then |
921 |
call calc_EAM_preforce_Frho(nlocal,pot) |
922 |
endif |
923 |
|
924 |
|
925 |
end subroutine do_preforce |
926 |
|
927 |
|
928 |
subroutine get_interatomic_vector(q_i, q_j, d, r_sq) |
929 |
|
930 |
real (kind = dp), dimension(3) :: q_i |
931 |
real (kind = dp), dimension(3) :: q_j |
932 |
real ( kind = dp ), intent(out) :: r_sq |
933 |
real( kind = dp ) :: d(3), scaled(3) |
934 |
integer i |
935 |
|
936 |
d(1:3) = q_j(1:3) - q_i(1:3) |
937 |
|
938 |
! Wrap back into periodic box if necessary |
939 |
if ( SimUsesPBC() ) then |
940 |
|
941 |
if( .not.boxIsOrthorhombic ) then |
942 |
! calc the scaled coordinates. |
943 |
|
944 |
scaled = matmul(HmatInv, d) |
945 |
|
946 |
! wrap the scaled coordinates |
947 |
|
948 |
scaled = scaled - anint(scaled) |
949 |
|
950 |
|
951 |
! calc the wrapped real coordinates from the wrapped scaled |
952 |
! coordinates |
953 |
|
954 |
d = matmul(Hmat,scaled) |
955 |
|
956 |
else |
957 |
! calc the scaled coordinates. |
958 |
|
959 |
do i = 1, 3 |
960 |
scaled(i) = d(i) * HmatInv(i,i) |
961 |
|
962 |
! wrap the scaled coordinates |
963 |
|
964 |
scaled(i) = scaled(i) - anint(scaled(i)) |
965 |
|
966 |
! calc the wrapped real coordinates from the wrapped scaled |
967 |
! coordinates |
968 |
|
969 |
d(i) = scaled(i)*Hmat(i,i) |
970 |
enddo |
971 |
endif |
972 |
|
973 |
endif |
974 |
|
975 |
r_sq = dot_product(d,d) |
976 |
|
977 |
end subroutine get_interatomic_vector |
978 |
|
979 |
subroutine check_initialization(error) |
980 |
integer, intent(out) :: error |
981 |
|
982 |
error = 0 |
983 |
! Make sure we are properly initialized. |
984 |
if (.not. do_forces_initialized) then |
985 |
write(*,*) "Forces not initialized" |
986 |
error = -1 |
987 |
return |
988 |
endif |
989 |
|
990 |
#ifdef IS_MPI |
991 |
if (.not. isMPISimSet()) then |
992 |
write(default_error,*) "ERROR: mpiSimulation has not been initialized!" |
993 |
error = -1 |
994 |
return |
995 |
endif |
996 |
#endif |
997 |
|
998 |
return |
999 |
end subroutine check_initialization |
1000 |
|
1001 |
|
1002 |
subroutine zero_work_arrays() |
1003 |
|
1004 |
#ifdef IS_MPI |
1005 |
|
1006 |
q_Row = 0.0_dp |
1007 |
q_Col = 0.0_dp |
1008 |
|
1009 |
u_l_Row = 0.0_dp |
1010 |
u_l_Col = 0.0_dp |
1011 |
|
1012 |
A_Row = 0.0_dp |
1013 |
A_Col = 0.0_dp |
1014 |
|
1015 |
f_Row = 0.0_dp |
1016 |
f_Col = 0.0_dp |
1017 |
f_Temp = 0.0_dp |
1018 |
|
1019 |
t_Row = 0.0_dp |
1020 |
t_Col = 0.0_dp |
1021 |
t_Temp = 0.0_dp |
1022 |
|
1023 |
pot_Row = 0.0_dp |
1024 |
pot_Col = 0.0_dp |
1025 |
pot_Temp = 0.0_dp |
1026 |
|
1027 |
rf_Row = 0.0_dp |
1028 |
rf_Col = 0.0_dp |
1029 |
rf_Temp = 0.0_dp |
1030 |
|
1031 |
#endif |
1032 |
|
1033 |
|
1034 |
if (FF_uses_EAM .and. SimUsesEAM()) then |
1035 |
call clean_EAM() |
1036 |
endif |
1037 |
|
1038 |
|
1039 |
|
1040 |
|
1041 |
|
1042 |
rf = 0.0_dp |
1043 |
tau_Temp = 0.0_dp |
1044 |
virial_Temp = 0.0_dp |
1045 |
end subroutine zero_work_arrays |
1046 |
|
1047 |
function skipThisPair(atom1, atom2) result(skip_it) |
1048 |
integer, intent(in) :: atom1 |
1049 |
integer, intent(in), optional :: atom2 |
1050 |
logical :: skip_it |
1051 |
integer :: unique_id_1, unique_id_2 |
1052 |
integer :: me_i,me_j |
1053 |
integer :: i |
1054 |
|
1055 |
skip_it = .false. |
1056 |
|
1057 |
!! there are a number of reasons to skip a pair or a particle |
1058 |
!! mostly we do this to exclude atoms who are involved in short |
1059 |
!! range interactions (bonds, bends, torsions), but we also need |
1060 |
!! to exclude some overcounted interactions that result from |
1061 |
!! the parallel decomposition |
1062 |
|
1063 |
#ifdef IS_MPI |
1064 |
!! in MPI, we have to look up the unique IDs for each atom |
1065 |
unique_id_1 = tagRow(atom1) |
1066 |
#else |
1067 |
!! in the normal loop, the atom numbers are unique |
1068 |
unique_id_1 = atom1 |
1069 |
#endif |
1070 |
|
1071 |
!! We were called with only one atom, so just check the global exclude |
1072 |
!! list for this atom |
1073 |
if (.not. present(atom2)) then |
1074 |
do i = 1, nExcludes_global |
1075 |
if (excludesGlobal(i) == unique_id_1) then |
1076 |
skip_it = .true. |
1077 |
return |
1078 |
end if |
1079 |
end do |
1080 |
return |
1081 |
end if |
1082 |
|
1083 |
#ifdef IS_MPI |
1084 |
unique_id_2 = tagColumn(atom2) |
1085 |
#else |
1086 |
unique_id_2 = atom2 |
1087 |
#endif |
1088 |
|
1089 |
#ifdef IS_MPI |
1090 |
!! this situation should only arise in MPI simulations |
1091 |
if (unique_id_1 == unique_id_2) then |
1092 |
skip_it = .true. |
1093 |
return |
1094 |
end if |
1095 |
|
1096 |
!! this prevents us from doing the pair on multiple processors |
1097 |
if (unique_id_1 < unique_id_2) then |
1098 |
if (mod(unique_id_1 + unique_id_2,2) == 0) then |
1099 |
skip_it = .true. |
1100 |
return |
1101 |
endif |
1102 |
else |
1103 |
if (mod(unique_id_1 + unique_id_2,2) == 1) then |
1104 |
skip_it = .true. |
1105 |
return |
1106 |
endif |
1107 |
endif |
1108 |
#endif |
1109 |
|
1110 |
!! the rest of these situations can happen in all simulations: |
1111 |
do i = 1, nExcludes_global |
1112 |
if ((excludesGlobal(i) == unique_id_1) .or. & |
1113 |
(excludesGlobal(i) == unique_id_2)) then |
1114 |
skip_it = .true. |
1115 |
return |
1116 |
endif |
1117 |
enddo |
1118 |
|
1119 |
do i = 1, nExcludes_local |
1120 |
if (excludesLocal(1,i) == unique_id_1) then |
1121 |
if (excludesLocal(2,i) == unique_id_2) then |
1122 |
skip_it = .true. |
1123 |
return |
1124 |
endif |
1125 |
else |
1126 |
if (excludesLocal(1,i) == unique_id_2) then |
1127 |
if (excludesLocal(2,i) == unique_id_1) then |
1128 |
skip_it = .true. |
1129 |
return |
1130 |
endif |
1131 |
endif |
1132 |
endif |
1133 |
end do |
1134 |
|
1135 |
return |
1136 |
end function skipThisPair |
1137 |
|
1138 |
function FF_UsesDirectionalAtoms() result(doesit) |
1139 |
logical :: doesit |
1140 |
doesit = FF_uses_dipoles .or. FF_uses_sticky .or. & |
1141 |
FF_uses_GB .or. FF_uses_RF |
1142 |
end function FF_UsesDirectionalAtoms |
1143 |
|
1144 |
function FF_RequiresPrepairCalc() result(doesit) |
1145 |
logical :: doesit |
1146 |
doesit = FF_uses_EAM |
1147 |
end function FF_RequiresPrepairCalc |
1148 |
|
1149 |
function FF_RequiresPostpairCalc() result(doesit) |
1150 |
logical :: doesit |
1151 |
doesit = FF_uses_RF |
1152 |
end function FF_RequiresPostpairCalc |
1153 |
|
1154 |
#ifdef PROFILE |
1155 |
function getforcetime() result(totalforcetime) |
1156 |
real(kind=dp) :: totalforcetime |
1157 |
totalforcetime = forcetime |
1158 |
end function getforcetime |
1159 |
#endif |
1160 |
|
1161 |
!! This cleans componets of force arrays belonging only to fortran |
1162 |
|
1163 |
end module do_Forces |