cell.h 33 KB
Newer Older
1
/*******************************************************************************
2
 * This file is part of SWIFT.
3
 * Copyright (c) 2012 Pedro Gonnet (pedro.gonnet@durham.ac.uk)
4
5
6
7
 *                    Matthieu Schaller (matthieu.schaller@durham.ac.uk)
 *               2015 Peter W. Draper (p.w.draper@durham.ac.uk)
 *               2016 John A. Regan (john.a.regan@durham.ac.uk)
 *                    Tom Theuns (tom.theuns@durham.ac.uk)
8
 *
9
10
11
12
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
13
 *
14
15
16
17
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
18
 *
19
20
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
21
 *
22
 ******************************************************************************/
23
24
#ifndef SWIFT_CELL_H
#define SWIFT_CELL_H
25

26
27
28
/* Config parameters. */
#include "../config.h"

29
/* Includes. */
30
31
32
#include <stddef.h>

/* Local includes. */
33
#include "align.h"
34
#include "kernel_hydro.h"
Pedro Gonnet's avatar
Pedro Gonnet committed
35
#include "lock.h"
36
#include "multipole.h"
37
#include "part.h"
38
#include "space.h"
39
#include "task.h"
40
#include "timeline.h"
41

42
/* Avoid cyclic inclusions */
43
struct engine;
44
struct scheduler;
45

46
47
48
/* Max tag size set to 2^29 to take into account some MPI implementations
 * that use 2^31 as the upper bound on MPI tags and the fact that
 * cell_next_tag is multiplied by 2 when passed to an MPI function.
49
50
 * The maximum was lowered by a further factor of 2 to be on the safe side.*/
#define cell_max_tag (1 << 29)
51

52
#define cell_align 128
53

54
55
56
/* Global variables. */
extern int cell_next_tag;

57
58
59
60
/* Struct to temporarily buffer the particle locations and bin id. */
struct cell_buff {
  double x[3];
  int ind;
61
} SWIFT_STRUCT_ALIGN;
62

63
64
65
66
67
68
69
70
71
72
/* Mini struct to link cells to tasks. Used as a linked list. */
struct link {

  /* The task pointer. */
  struct task *t;

  /* The next pointer. */
  struct link *next;
};

73
74
75
76
77
/**
 * @brief Packed cell for information correct at rebuild time.
 *
 * Contains all the information for a tree walk in a non-local cell.
 */
78
79
struct pcell {

80
81
  /*! Hydro variables */
  struct {
Matthieu Schaller's avatar
Matthieu Schaller committed
82

83
84
    /*! Maximal smoothing length. */
    double h_max;
85

86
87
    /*! Minimal integer end-of-timestep in this cell for hydro tasks */
    integertime_t ti_end_min;
88

89
90
    /*! Maximal integer end-of-timestep in this cell for hydro tasks */
    integertime_t ti_end_max;
91

92
93
    /*! Maximal integer beginning-of-timestep in this cell for hydro tasks */
    integertime_t ti_beg_max;
94

95
    /*! Integer time of the last drift of the #part in this cell */
96
    integertime_t ti_old_part;
97

98
99
    /*! Number of #part in this cell. */
    int count;
100

101
  } hydro;
102

103
104
  /*! Gravity variables */
  struct {
105

106
107
    /*! This cell's gravity-related tensors */
    struct multipole m_pole;
108

109
110
    /*! Centre of mass. */
    double CoM[3];
111

112
113
    /*! Centre of mass at rebuild time. */
    double CoM_rebuild[3];
114

115
116
    /*! Upper limit of the CoM<->gpart distance. */
    double r_max;
117

118
119
    /*! Upper limit of the CoM<->gpart distance at last rebuild. */
    double r_max_rebuild;
120

121
122
    /*! Minimal integer end-of-timestep in this cell for gravity tasks */
    integertime_t ti_end_min;
Pedro Gonnet's avatar
Pedro Gonnet committed
123

124
125
    /*! Maximal integer end-of-timestep in this cell for gravity tasks */
    integertime_t ti_end_max;
126

127
128
    /*! Maximal integer beginning-of-timestep in this cell for gravity tasks */
    integertime_t ti_beg_max;
129

130
    /*! Integer time of the last drift of the #gpart in this cell */
131
    integertime_t ti_old_part;
132

133
134
    /*! Integer time of the last drift of the #multipole in this cell */
    integertime_t ti_old_multipole;
135

136
    /*! Number of #gpart in this cell. */
137
    int count;
138
139
140

  } grav;

141
142
143
144
145
146
  /*! Stars variables */
  struct {

    /*! Number of #spart in this cell. */
    int count;

Loic Hausammann's avatar
Loic Hausammann committed
147
148
149
    /*! Maximal smoothing length. */
    double h_max;

150
151
152
    /*! Minimal integer end-of-timestep in this cell for stars tasks */
    integertime_t ti_end_min;

153
154
155
    /*! Integer time of the last drift of the #spart in this cell */
    integertime_t ti_old_part;

156
157
  } stars;

158
159
160
  /*! Maximal depth in that part of the tree */
  int maxdepth;

161
162
  /*! Relative indices of the cell's progeny. */
  int progeny[8];
163

164
165
166
167
168
#ifdef SWIFT_DEBUG_CHECKS
  /* Cell ID (for debugging) */
  int cellID;
#endif

169
} SWIFT_STRUCT_ALIGN;
170

171
172
173
174
175
/**
 * @brief Cell information at the end of a time-step.
 */
struct pcell_step {

176
177
178
179
180
  /*! Hydro variables */
  struct {

    /*! Minimal integer end-of-timestep in this cell (hydro) */
    integertime_t ti_end_min;
181

182
183
    /*! Minimal integer end-of-timestep in this cell (hydro) */
    integertime_t ti_end_max;
184

185
    /*! Maximal distance any #part has travelled since last rebuild */
186
    float dx_max_part;
187

188
  } hydro;
189

190
191
192
193
194
195
196
197
  /*! Grav variables */
  struct {

    /*! Minimal integer end-of-timestep in this cell (gravity) */
    integertime_t ti_end_min;

    /*! Minimal integer end-of-timestep in this cell (gravity) */
    integertime_t ti_end_max;
198

199
  } grav;
200
201
202

  /*! Stars variables */
  struct {
Loic Hausammann's avatar
Loic Hausammann committed
203
204
205
206

    /*! Maximal distance any #part has travelled since last rebuild */
    float dx_max_part;

207
208
209
    /*! Minimal integer end-of-timestep in this cell (stars) */
    integertime_t ti_end_min;

210
  } stars;
211
212
};

213
214
215
216
217
/**
 * @brief Cell within the tree structure.
 *
 * Contains particles, links to tasks, a multipole object and counters.
 */
218
219
struct cell {

220
  /*! The cell location on the grid. */
221
222
  double loc[3];

223
  /*! The cell dimensions. */
224
  double width[3];
225

226
  /*! Pointers to the next level of cells. */
227
228
  struct cell *progeny[8];

229
230
231
  /*! Linking pointer for "memory management". */
  struct cell *next;

232
  /*! Parent cell. */
233
234
  struct cell *parent;

235
  /*! Super cell, i.e. the highest-level parent cell with *any* task */
236
  struct cell *super;
237

238
239
  /*! Hydro variables */
  struct {
240

241
242
    /*! Pointer to the #part data. */
    struct part *parts;
243

244
245
    /*! Pointer to the #xpart data. */
    struct xpart *xparts;
246

247
248
    /*! Pointer for the sorted indices. */
    struct entry *sort[13];
249

250
251
    /*! Super cell, i.e. the highest-level parent cell that has a hydro
     * pair/self tasks */
252
    struct cell *super;
253

254
255
    /*! The task computing this cell's sorts. */
    struct task *sorts;
256

257
258
    /*! The drift task for parts */
    struct task *drift;
259

260
261
262
263
264
265
266
267
268
    /*! Linked list of the tasks computing this cell's hydro density. */
    struct link *density;

    /* Linked list of the tasks computing this cell's hydro gradients. */
    struct link *gradient;

    /*! Linked list of the tasks computing this cell's hydro forces. */
    struct link *force;

269
270
271
    /*! Linked list of the tasks computing this cell's limiter. */
    struct link *limiter;

272
273
274
275
276
277
278
279
280
281
282
283
    /*! Dependency implicit task for the ghost  (in->ghost->out)*/
    struct task *ghost_in;

    /*! Dependency implicit task for the ghost  (in->ghost->out)*/
    struct task *ghost_out;

    /*! The ghost task itself */
    struct task *ghost;

    /*! The extra ghost task for complex hydro schemes */
    struct task *extra_ghost;

284
285
286
    /*! The task to end the force calculation */
    struct task *end_force;

287
288
289
290
291
    /*! Task for cooling */
    struct task *cooling;

    /*! Task for star formation */
    struct task *star_formation;
292

293
294
    /*! Max smoothing length in this cell. */
    double h_max;
295

296
297
298
    /*! Last (integer) time the cell's part were drifted forward in time. */
    integertime_t ti_old_part;

299
300
    /*! Minimum end of (integer) time step in this cell for hydro tasks. */
    integertime_t ti_end_min;
301

302
303
    /*! Maximum end of (integer) time step in this cell for hydro tasks. */
    integertime_t ti_end_max;
304

305
306
    /*! Maximum beginning of (integer) time step in this cell for hydro tasks.
     */
307
    integertime_t ti_beg_max;
308

309
310
    /*! Spin lock for various uses (#part case). */
    swift_lock_type lock;
311

312
313
    /*! Maximum part movement in this cell since last construction. */
    float dx_max_part;
314

315
316
    /*! Maximum particle movement in this cell since the last sort. */
    float dx_max_sort;
317

318
319
    /*! Values of h_max before the drifts, used for sub-cell tasks. */
    float h_max_old;
320

321
322
323
    /*! Values of dx_max before the drifts, used for sub-cell tasks. */
    float dx_max_part_old;

324
325
    /*! Values of dx_max_sort before the drifts, used for sub-cell tasks. */
    float dx_max_sort_old;
326

327
328
329
    /*! Nr of #part in this cell. */
    int count;

330
331
332
    /*! Nr of #part this cell can hold after addition of new #part. */
    int count_total;

333
334
335
336
337
338
339
340
341
    /*! Number of #part updated in this cell. */
    int updated;

    /*! Number of #part inhibited in this cell. */
    int inhibited;

    /*! Is the #part data of this cell being used in a sub-cell? */
    int hold;

342
343
    /*! Bit mask of sort directions that will be needed in the next timestep. */
    unsigned int requires_sorts;
344

345
346
    /*! Bit mask of sorts that need to be computed for this cell. */
    unsigned int do_sort;
347

348
349
350
    /*! Bit-mask indicating the sorted directions */
    unsigned int sorted;

351
352
    /*! Does this cell need to be drifted (hydro)? */
    char do_drift;
353

354
355
    /*! Do any of this cell's sub-cells need to be drifted (hydro)? */
    char do_sub_drift;
Tom Theuns's avatar
Tom Theuns committed
356

357
358
    /*! Do any of this cell's sub-cells need to be sorted? */
    char do_sub_sort;
359

360
361
362
363
364
365
    /*! Does this cell need to be limited? */
    char do_limiter;

    /*! Do any of this cell's sub-cells need to be limited? */
    char do_sub_limiter;

Matthieu Schaller's avatar
Matthieu Schaller committed
366
#ifdef SWIFT_DEBUG_CHECKS
367

368
369
    /*! Last (integer) time the cell's sort arrays were updated. */
    integertime_t ti_sort;
370

371
#endif
372

373
  } hydro;
374

375
376
  /*! Grav variables */
  struct {
377

378
    /*! Pointer to the #gpart data. */
379
    struct gpart *parts;
380

381
382
    /*! This cell's multipole. */
    struct gravity_tensors *multipole;
383

384
385
386
    /*! Super cell, i.e. the highest-level parent cell that has a grav pair/self
     * tasks */
    struct cell *super;
387

388
389
390
    /*! The drift task for gparts */
    struct task *drift;

391
392
393
    /*! Implicit task (going up- and down the tree) for the #gpart drifts */
    struct task *drift_out;

394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
    /*! Linked list of the tasks computing this cell's gravity forces. */
    struct link *grav;

    /*! Linked list of the tasks computing this cell's gravity M-M forces. */
    struct link *mm;

    /*! The multipole initialistation task */
    struct task *init;

    /*! Implicit task for the gravity initialisation */
    struct task *init_out;

    /*! Task computing long range non-periodic gravity interactions */
    struct task *long_range;

    /*! Implicit task for the down propagation */
    struct task *down_in;

    /*! Task propagating the mesh forces to the particles */
    struct task *mesh;

    /*! Task propagating the multipole to the particles */
    struct task *down;

418
419
420
    /*! The task to end the force calculation */
    struct task *end_force;

421
422
    /*! Minimum end of (integer) time step in this cell for gravity tasks. */
    integertime_t ti_end_min;
423

424
425
    /*! Maximum end of (integer) time step in this cell for gravity tasks. */
    integertime_t ti_end_max;
426

427
428
429
    /*! Maximum beginning of (integer) time step in this cell for gravity tasks.
     */
    integertime_t ti_beg_max;
430

431
    /*! Last (integer) time the cell's gpart were drifted forward in time. */
432
    integertime_t ti_old_part;
433

434
435
    /*! Last (integer) time the cell's multipole was drifted forward in time. */
    integertime_t ti_old_multipole;
436

437
    /*! Spin lock for various uses (#gpart case). */
438
    swift_lock_type plock;
439

440
441
    /*! Spin lock for various uses (#multipole case). */
    swift_lock_type mlock;
442

443
444
445
    /*! Nr of #gpart in this cell. */
    int count;

446
447
448
    /*! Nr of #gpart this cell can hold after addition of new #gpart. */
    int count_total;

449
    /*! Number of #gpart updated in this cell. */
450
    int updated;
451

452
453
454
    /*! Number of #gpart inhibited in this cell. */
    int inhibited;

455
    /*! Is the #gpart data of this cell being used in a sub-cell? */
456
    int phold;
457

458
459
    /*! Is the #multipole data of this cell being used in a sub-cell? */
    int mhold;
460

461
462
463
    /*! Number of M-M tasks that are associated with this cell. */
    short int nr_mm_tasks;

464
465
    /*! Does this cell need to be drifted (gravity)? */
    char do_drift;
466

467
468
    /*! Do any of this cell's sub-cells need to be drifted (gravity)? */
    char do_sub_drift;
Matthieu Schaller's avatar
Matthieu Schaller committed
469

470
  } grav;
471

472
473
  /*! Stars variables */
  struct {
474

475
476
    /*! Pointer to the #spart data. */
    struct spart *parts;
477

478
479
480
481
482
    /*! The star ghost task itself */
    struct task *ghost;

    /*! Linked list of the tasks computing this cell's star density. */
    struct link *density;
483

Alexei Borissov's avatar
Alexei Borissov committed
484
485
486
    /*! Linked list of the tasks computing this cell's star feedback. */
    struct link *feedback;

487
    /*! The task computing this cell's sorts before the density. */
488
    struct task *sorts;
Matthieu Schaller's avatar
Matthieu Schaller committed
489

490
    /*! The drift task for sparts */
491
    struct task *drift;
492

493
494
495
496
    struct task *stars_in;

    struct task *stars_out;

Loic Hausammann's avatar
Loic Hausammann committed
497
498
499
    /*! Max smoothing length in this cell. */
    double h_max;

500
501
502
    /*! Last (integer) time the cell's spart were drifted forward in time. */
    integertime_t ti_old_part;

503
504
505
506
507
508
    /*! Spin lock for various uses (#spart case). */
    swift_lock_type lock;

    /*! Nr of #spart in this cell. */
    int count;

509
510
511
    /*! Nr of #spart this cell can hold after addition of new #spart. */
    int count_total;

Loic Hausammann's avatar
Loic Hausammann committed
512
513
514
515
516
517
518
519
520
    /*! Values of h_max before the drifts, used for sub-cell tasks. */
    float h_max_old;

    /*! Maximum part movement in this cell since last construction. */
    float dx_max_part;

    /*! Values of dx_max before the drifts, used for sub-cell tasks. */
    float dx_max_part_old;

Matthieu Schaller's avatar
Matthieu Schaller committed
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
    /*! Maximum particle movement in this cell since the last sort. */
    float dx_max_sort;

    /*! Values of dx_max_sort before the drifts, used for sub-cell tasks. */
    float dx_max_sort_old;

    /*! Bit mask of sort directions that will be needed in the next timestep. */
    unsigned int requires_sorts;

    /*! Pointer for the sorted indices. */
    struct entry *sort[13];

    /*! Bit-mask indicating the sorted directions */
    unsigned int sorted;

    /*! Bit mask of sorts that need to be computed for this cell. */
    unsigned int do_sort;

    /*! Do any of this cell's sub-cells need to be sorted? */
    char do_sub_sort;

    /*! Maximum end of (integer) time step in this cell for gravity tasks. */
    integertime_t ti_end_min;

545
546
    /*! Number of #spart updated in this cell. */
    int updated;
547

548
549
550
    /*! Number of #spart inhibited in this cell. */
    int inhibited;

551
552
    /*! Is the #spart data of this cell being used in a sub-cell? */
    int hold;
553

554
555
556
557
558
559
    /*! Does this cell need to be drifted (stars)? */
    char do_drift;

    /*! Do any of this cell's sub-cells need to be drifted (stars)? */
    char do_sub_drift;

Matthieu Schaller's avatar
Matthieu Schaller committed
560
561
562
563
564
#ifdef SWIFT_DEBUG_CHECKS
    /*! Last (integer) time the cell's sort arrays were updated. */
    integertime_t ti_sort;
#endif

565
  } stars;
566

567
568
569
#ifdef WITH_MPI
  /*! MPI variables */
  struct {
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600

    struct {
      /* Task receiving hydro data (positions). */
      struct task *recv_xv;

      /* Task receiving hydro data (density). */
      struct task *recv_rho;

      /* Task receiving hydro data (gradient). */
      struct task *recv_gradient;

      /* Linked list for sending hydro data (positions). */
      struct link *send_xv;

      /* Linked list for sending hydro data (density). */
      struct link *send_rho;

      /* Linked list for sending hydro data (gradient). */
      struct link *send_gradient;

    } hydro;

    struct {

      /* Task receiving gpart data. */
      struct task *recv;

      /* Linked list for sending gpart data. */
      struct link *send;
    } grav;

601
    struct {
602
      /* Task receiving spart data. */
603
      struct task *recv;
604

605
606
607
608
609
610
      /* Linked list for sending spart data. */
      struct link *send;
    } stars;

    struct {
      /* Task receiving limiter data. */
611
612
      struct task *recv;

613
      /* Linked list for sending limiter data. */
614
615
616
      struct link *send;
    } limiter;

617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
    /* Task receiving data (time-step). */
    struct task *recv_ti;

    /* Linked list for sending data (time-step). */
    struct link *send_ti;

    /*! Bit mask of the proxies this cell is registered with. */
    unsigned long long int sendto;

    /*! Pointer to this cell's packed representation. */
    struct pcell *pcell;

    /*! Size of the packed representation */
    int pcell_size;

    /*! MPI tag associated with this cell */
    int tag;
634

635
636
  } mpi;
#endif
637

638
639
  /*! The first kick task */
  struct task *kick1;
640

641
642
  /*! The second kick task */
  struct task *kick2;
643

644
645
646
  /*! The task to compute time-steps */
  struct task *timestep;

647
648
  /*! The task to limit the time-step of inactive particles */
  struct task *timestep_limiter;
649

Loic Hausammann's avatar
Format    
Loic Hausammann committed
650
651
652
  /*! The logger task */
  struct task *logger;

653
654
  /*! Minimum dimension, i.e. smallest edge of this cell (min(width)). */
  float dmin;
655

656
657
658
659
660
661
  /*! ID of the previous owner, e.g. runner. */
  int owner;

  /*! ID of the node this cell lives on. */
  int nodeID;

662
663
664
665
666
667
668
669
670
671
672
673
  /*! Number of tasks that are associated with this cell. */
  short int nr_tasks;

  /*! The depth of this cell in the tree. */
  char depth;

  /*! Is this cell split ? */
  char split;

  /*! The maximal depth of this cell and its progenies */
  char maxdepth;

674
#ifdef SWIFT_DEBUG_CHECKS
675
676
677
  /* Cell ID (for debugging) */
  int cellID;

678
679
680
681
682
683
684
  /*! The list of tasks that have been executed on this cell */
  char tasks_executed[64];

  /*! The list of sub-tasks that have been executed on this cell */
  char subtasks_executed[64];
#endif

685
} SWIFT_STRUCT_ALIGN;
686

687
688
689
690
/* Convert cell location to ID. */
#define cell_getid(cdim, i, j, k) \
  ((int)(k) + (cdim)[2] * ((int)(j) + (cdim)[1] * (int)(i)))

691
/* Function prototypes. */
692
693
void cell_split(struct cell *c, ptrdiff_t parts_offset, ptrdiff_t sparts_offset,
                struct cell_buff *buff, struct cell_buff *sbuff,
694
                struct cell_buff *gbuff);
695
void cell_sanitize(struct cell *c, int treated);
696
697
698
699
int cell_locktree(struct cell *c);
void cell_unlocktree(struct cell *c);
int cell_glocktree(struct cell *c);
void cell_gunlocktree(struct cell *c);
700
701
int cell_mlocktree(struct cell *c);
void cell_munlocktree(struct cell *c);
702
703
int cell_slocktree(struct cell *c);
void cell_sunlocktree(struct cell *c);
704
int cell_pack(struct cell *c, struct pcell *pc, const int with_gravity);
Matthieu Schaller's avatar
Matthieu Schaller committed
705
706
int cell_unpack(struct pcell *pc, struct cell *c, struct space *s,
                const int with_gravity);
707
708
int cell_pack_tags(const struct cell *c, int *tags);
int cell_unpack_tags(const int *tags, struct cell *c);
709
710
int cell_pack_end_step(struct cell *c, struct pcell_step *pcell);
int cell_unpack_end_step(struct cell *c, struct pcell_step *pcell);
711
712
int cell_pack_multipoles(struct cell *c, struct gravity_tensors *m);
int cell_unpack_multipoles(struct cell *c, struct gravity_tensors *m);
713
int cell_getsize(struct cell *c);
714
int cell_link_parts(struct cell *c, struct part *parts);
715
int cell_link_gparts(struct cell *c, struct gpart *gparts);
716
int cell_link_sparts(struct cell *c, struct spart *sparts);
717
718
int cell_link_foreign_parts(struct cell *c, struct part *parts);
int cell_link_foreign_gparts(struct cell *c, struct gpart *gparts);
719
int cell_count_parts_for_tasks(const struct cell *c);
720
int cell_count_gparts_for_tasks(const struct cell *c);
721
void cell_clean_links(struct cell *c, void *data);
722
void cell_make_multipoles(struct cell *c, integertime_t ti_current);
723
724
void cell_check_multipole(struct cell *c);
void cell_check_foreign_multipole(const struct cell *c);
725
void cell_clean(struct cell *c);
726
727
void cell_check_part_drift_point(struct cell *c, void *data);
void cell_check_gpart_drift_point(struct cell *c, void *data);
728
void cell_check_spart_drift_point(struct cell *c, void *data);
729
void cell_check_multipole_drift_point(struct cell *c, void *data);
730
void cell_reset_task_counters(struct cell *c);
731
int cell_unskip_hydro_tasks(struct cell *c, struct scheduler *s);
732
int cell_unskip_stars_tasks(struct cell *c, struct scheduler *s);
733
int cell_unskip_gravity_tasks(struct cell *c, struct scheduler *s);
734
void cell_set_super(struct cell *c, struct cell *super);
735
void cell_drift_part(struct cell *c, const struct engine *e, int force);
736
void cell_drift_gpart(struct cell *c, const struct engine *e, int force);
737
void cell_drift_spart(struct cell *c, const struct engine *e, int force);
738
void cell_drift_multipole(struct cell *c, const struct engine *e);
739
void cell_drift_all_multipoles(struct cell *c, const struct engine *e);
740
void cell_check_timesteps(struct cell *c);
741
void cell_store_pre_drift_values(struct cell *c);
742
743
void cell_activate_subcell_hydro_tasks(struct cell *ci, struct cell *cj,
                                       struct scheduler *s);
744
745
void cell_activate_subcell_grav_tasks(struct cell *ci, struct cell *cj,
                                      struct scheduler *s);
746
747
void cell_activate_subcell_stars_tasks(struct cell *ci, struct cell *cj,
                                       struct scheduler *s);
748
749
void cell_activate_subcell_external_grav_tasks(struct cell *ci,
                                               struct scheduler *s);
750
void cell_activate_drift_part(struct cell *c, struct scheduler *s);
751
void cell_activate_drift_gpart(struct cell *c, struct scheduler *s);
Loic Hausammann's avatar
Loic Hausammann committed
752
void cell_activate_drift_spart(struct cell *c, struct scheduler *s);
753
void cell_activate_hydro_sorts(struct cell *c, int sid, struct scheduler *s);
Loic Hausammann's avatar
Loic Hausammann committed
754
void cell_activate_stars_sorts(struct cell *c, int sid, struct scheduler *s);
755
void cell_activate_limiter(struct cell *c, struct scheduler *s);
756
void cell_clear_drift_flags(struct cell *c, void *data);
757
void cell_clear_limiter_flags(struct cell *c, void *data);
Pedro Gonnet's avatar
Pedro Gonnet committed
758
void cell_set_super_mapper(void *map_data, int num_elements, void *extra_data);
759
760
void cell_check_spart_pos(const struct cell *c,
                          const struct spart *global_sparts);
761
void cell_clear_stars_sort_flags(struct cell *c, const int is_super);
762
int cell_has_tasks(struct cell *c);
763
764
void cell_remove_part(const struct engine *e, struct cell *c, struct part *p,
                      struct xpart *xp);
765
766
767
768
void cell_remove_gpart(const struct engine *e, struct cell *c,
                       struct gpart *gp);
void cell_remove_spart(const struct engine *e, struct cell *c,
                       struct spart *sp);
769
struct spart *cell_add_spart(struct engine *e, struct cell *c);
Matthieu Schaller's avatar
Matthieu Schaller committed
770
771
772
773
struct gpart *cell_convert_part_to_gpart(const struct engine *e, struct cell *c,
                                         struct part *p, struct xpart *xp);
struct gpart *cell_convert_spart_to_gpart(const struct engine *e,
                                          struct cell *c, struct spart *sp);
774
775
struct spart *cell_convert_part_to_spart(struct engine *e, struct cell *c,
                                         struct part *p, struct xpart *xp);
776
void cell_reorder_extra_parts(struct cell *c, const ptrdiff_t parts_offset);
777
778
void cell_reorder_extra_gparts(struct cell *c, struct part *parts,
                               struct spart *sparts);
779
void cell_reorder_extra_sparts(struct cell *c, const ptrdiff_t sparts_offset);
780
781
int cell_can_use_pair_mm(const struct cell *ci, const struct cell *cj,
                         const struct engine *e, const struct space *s);
782
int cell_can_use_pair_mm_rebuild(const struct cell *ci, const struct cell *cj,
Matthieu Schaller's avatar
Matthieu Schaller committed
783
                                 const struct engine *e, const struct space *s);
784

785
/**
Peter W. Draper's avatar
Peter W. Draper committed
786
 * @brief Compute the square of the minimal distance between any two points in
Matthieu Schaller's avatar
Matthieu Schaller committed
787
 * two cells of the same size
788
789
790
791
792
793
 *
 * @param ci The first #cell.
 * @param cj The second #cell.
 * @param periodic Are we using periodic BCs?
 * @param dim The dimensions of the simulation volume
 */
Matthieu Schaller's avatar
Matthieu Schaller committed
794
795
796
__attribute__((always_inline)) INLINE static double cell_min_dist2_same_size(
    const struct cell *restrict ci, const struct cell *restrict cj,
    const int periodic, const double dim[3]) {
797
798

#ifdef SWIFT_DEBUG_CHECKS
Matthieu Schaller's avatar
Matthieu Schaller committed
799
800
801
  if (ci->width[0] != cj->width[0]) error("Cells of different size!");
  if (ci->width[1] != cj->width[1]) error("Cells of different size!");
  if (ci->width[2] != cj->width[2]) error("Cells of different size!");
802
803
#endif

Matthieu Schaller's avatar
Matthieu Schaller committed
804
805
806
807
808
809
810
811
812
813
814
815
  const double cix_min = ci->loc[0];
  const double ciy_min = ci->loc[1];
  const double ciz_min = ci->loc[2];
  const double cjx_min = cj->loc[0];
  const double cjy_min = cj->loc[1];
  const double cjz_min = cj->loc[2];

  const double cix_max = ci->loc[0] + ci->width[0];
  const double ciy_max = ci->loc[1] + ci->width[1];
  const double ciz_max = ci->loc[2] + ci->width[2];
  const double cjx_max = cj->loc[0] + cj->width[0];
  const double cjy_max = cj->loc[1] + cj->width[1];
816
817
818
819
820
  const double cjz_max = cj->loc[2] + cj->width[2];

  if (periodic) {

    const double dx = min4(fabs(nearest(cix_min - cjx_min, dim[0])),
Matthieu Schaller's avatar
Matthieu Schaller committed
821
822
823
824
                           fabs(nearest(cix_min - cjx_max, dim[0])),
                           fabs(nearest(cix_max - cjx_min, dim[0])),
                           fabs(nearest(cix_max - cjx_max, dim[0])));

825
    const double dy = min4(fabs(nearest(ciy_min - cjy_min, dim[1])),
Matthieu Schaller's avatar
Matthieu Schaller committed
826
827
828
829
                           fabs(nearest(ciy_min - cjy_max, dim[1])),
                           fabs(nearest(ciy_max - cjy_min, dim[1])),
                           fabs(nearest(ciy_max - cjy_max, dim[1])));

830
    const double dz = min4(fabs(nearest(ciz_min - cjz_min, dim[2])),
Matthieu Schaller's avatar
Matthieu Schaller committed
831
832
833
834
                           fabs(nearest(ciz_min - cjz_max, dim[2])),
                           fabs(nearest(ciz_max - cjz_min, dim[2])),
                           fabs(nearest(ciz_max - cjz_max, dim[2])));

835
836
837
838
    return dx * dx + dy * dy + dz * dz;

  } else {

Matthieu Schaller's avatar
Matthieu Schaller committed
839
840
841
    const double dx = min(fabs(cix_max - cjx_min), fabs(cix_min - cjx_max));
    const double dy = min(fabs(ciy_max - cjy_min), fabs(ciy_min - cjy_max));
    const double dz = min(fabs(ciz_max - cjz_min), fabs(ciz_min - cjz_max));
842
843
844
845
846

    return dx * dx + dy * dy + dz * dz;
  }
}

847
848
849
850
851
852
853
854
/* Inlined functions (for speed). */

/**
 * @brief Can a sub-pair hydro task recurse to a lower level based
 * on the status of the particles in the cell.
 *
 * @param c The #cell.
 */
Matthieu Schaller's avatar
Matthieu Schaller committed
855
856
__attribute__((always_inline)) INLINE static int
cell_can_recurse_in_pair_hydro_task(const struct cell *c) {
857
858
859
860
861

  /* Is the cell split ? */
  /* If so, is the cut-off radius plus the max distance the parts have moved */
  /* smaller than the sub-cell sizes ? */
  /* Note: We use the _old values as these might have been updated by a drift */
862
  return c->split && ((kernel_gamma * c->hydro.h_max_old +
863
                       c->hydro.dx_max_part_old) < 0.5f * c->dmin);
864
865
866
867
868
869
870
871
}

/**
 * @brief Can a sub-self hydro task recurse to a lower level based
 * on the status of the particles in the cell.
 *
 * @param c The #cell.
 */
Matthieu Schaller's avatar
Matthieu Schaller committed
872
873
__attribute__((always_inline)) INLINE static int
cell_can_recurse_in_self_hydro_task(const struct cell *c) {
874

875
  /* Is the cell split and not smaller than the smoothing length? */
876
  return c->split && (kernel_gamma * c->hydro.h_max_old < 0.5f * c->dmin);
877
878
}

879
880
881
882
/**
 * @brief Can a sub-pair star task recurse to a lower level based
 * on the status of the particles in the cell.
 *
loikki's avatar
loikki committed
883
884
 * @param ci The #cell with stars.
 * @param cj The #cell with hydro parts.
885
886
 */
__attribute__((always_inline)) INLINE static int
887
888
cell_can_recurse_in_pair_stars_task(const struct cell *ci,
                                    const struct cell *cj) {
889

Loic Hausammann's avatar
Loic Hausammann committed
890
891
892
893
  /* Is the cell split ? */
  /* If so, is the cut-off radius plus the max distance the parts have moved */
  /* smaller than the sub-cell sizes ? */
  /* Note: We use the _old values as these might have been updated by a drift */
894
895
896
897
898
  return ci->split && cj->split &&
         ((kernel_gamma * ci->stars.h_max_old + ci->stars.dx_max_part_old) <
          0.5f * ci->dmin) &&
         ((kernel_gamma * cj->hydro.h_max_old + cj->hydro.dx_max_part_old) <
          0.5f * cj->dmin);
899
900
901
902
903
904
905
906
907
908
909
}

/**
 * @brief Can a sub-self stars task recurse to a lower level based
 * on the status of the particles in the cell.
 *
 * @param c The #cell.
 */
__attribute__((always_inline)) INLINE static int
cell_can_recurse_in_self_stars_task(const struct cell *c) {

Loic Hausammann's avatar
Loic Hausammann committed
910
  /* Is the cell split and not smaller than the smoothing length? */
loikki's avatar
loikki committed
911
  return c->split && (kernel_gamma * c->stars.h_max_old < 0.5f * c->dmin) &&
912
         (kernel_gamma * c->hydro.h_max_old < 0.5f * c->dmin);
913
914
}

915
/**
916
 * @brief Can a pair hydro task associated with a cell be split into smaller
917
918
919
920
 * sub-tasks.
 *
 * @param c The #cell.
 */
921
__attribute__((always_inline)) INLINE static int cell_can_split_pair_hydro_task(
922
923
924
925
926
927
928
    const struct cell *c) {

  /* Is the cell split ? */
  /* If so, is the cut-off radius with some leeway smaller than */
  /* the sub-cell sizes ? */
  /* Note that since tasks are create after a rebuild no need to take */
  /* into account any part motion (i.e. dx_max == 0 here) */
929
  return c->split &&
930
931
         (space_stretch * kernel_gamma * c->hydro.h_max < 0.5f * c->dmin) &&
         (space_stretch * kernel_gamma * c->stars.h_max < 0.5f * c->dmin);
932
933
934
}

/**
935
 * @brief Can a self hydro task associated with a cell be split into smaller
936
937
938
939
 * sub-tasks.
 *
 * @param c The #cell.
 */
940
__attribute__((always_inline)) INLINE static int cell_can_split_self_hydro_task(
941
942
943
    const struct cell *c) {

  /* Is the cell split ? */
944
945
  /* If so, is the cut-off radius with some leeway smaller than */
  /* the sub-cell sizes ? */
946
947
  /* Note: No need for more checks here as all the sub-pairs and sub-self */
  /* tasks will be created. So no need to check for h_max */
948
  return c->split &&
949
950
         (space_stretch * kernel_gamma * c->hydro.h_max < 0.5f * c->dmin) &&
         (space_stretch * kernel_gamma * c->stars.h_max < 0.5f * c->dmin);
951
952
}

953
954
955
956
/**
 * @brief Can a pair stars task associated with a cell be split into smaller
 * sub-tasks.
 *
loikki's avatar
loikki committed
957
958
 * @param ci The #cell with stars.
 * @param cj The #cell with hydro part.
959
960
 */
__attribute__((always_inline)) INLINE static int cell_can_split_pair_stars_task(
loikki's avatar
loikki committed
961
    const struct cell *ci, const struct cell *cj) {
962

Loic Hausammann's avatar
Loic Hausammann committed
963
964
965
966
967
  /* Is the cell split ? */
  /* If so, is the cut-off radius with some leeway smaller than */
  /* the sub-cell sizes ? */
  /* Note that since tasks are create after a rebuild no need to take */
  /* into account any part motion (i.e. dx_max == 0 here) */
loikki's avatar
loikki committed
968
  return ci->split && cj->split &&
969
970
         (space_stretch * kernel_gamma * ci->stars.h_max < 0.5f * ci->dmin) &&
         (space_stretch * kernel_gamma * cj->hydro.h_max < 0.5f * cj->dmin);
971
972
973
974
975
976
977
978
979
980
981
}

/**
 * @brief Can a self stars task associated with a cell be split into smaller
 * sub-tasks.
 *
 * @param c The #cell.
 */
__attribute__((always_inline)) INLINE static int cell_can_split_self_stars_task(
    const struct cell *c) {

Loic Hausammann's avatar
Loic Hausammann committed
982
983
984
985
986
987
  /* Is the cell split ? */
  /* If so, is the cut-off radius with some leeway smaller than */
  /* the sub-cell sizes ? */
  /* Note: No need for more checks here as all the sub-pairs and sub-self */
  /* tasks will be created. So no need to check for h_max */
  return c->split &&
988
989
         (space_stretch * kernel_gamma * c->stars.h_max < 0.5f * c->dmin) &&
         (space_stretch * kernel_gamma * c->hydro.h_max < 0.5f * c->dmin);
990
991
}

992
993
994
995
996
997
/**
 * @brief Can a pair gravity task associated with a cell be split into smaller
 * sub-tasks.
 *
 * @param c The #cell.
 */
Matthieu Schaller's avatar
Matthieu Schaller committed
998
999
__attribute__((always_inline)) INLINE static int
cell_can_split_pair_gravity_task(const struct cell *c) {
1000