task.c 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
25
26
27
28
29
30
 ******************************************************************************/

/* Config parameters. */
#include "../config.h"

/* Some standard headers. */
#include <float.h>
#include <limits.h>
#include <sched.h>
31
32
33
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
34

35
36
/* MPI headers. */
#ifdef WITH_MPI
37
#include <mpi.h>
38
39
#endif

40
41
42
/* This object's header. */
#include "task.h"

43
/* Local headers. */
Pedro Gonnet's avatar
Pedro Gonnet committed
44
#include "atomic.h"
45
#include "engine.h"
46
#include "error.h"
47
#include "inline.h"
48
#include "lock.h"
49
50

/* Task type names. */
51
52
53
54
55
56
57
58
59
60
61
62
63
const char *taskID_names[task_type_count] = {"none",
                                             "sort",
                                             "self",
                                             "pair",
                                             "sub_self",
                                             "sub_pair",
                                             "init_grav",
                                             "init_grav_out",
                                             "ghost_in",
                                             "ghost",
                                             "ghost_out",
                                             "extra_ghost",
                                             "drift_part",
64
                                             "drift_spart",
65
66
                                             "drift_gpart",
                                             "drift_gpart_out",
67
                                             "end_hydro_force",
68
69
70
                                             "kick1",
                                             "kick2",
                                             "timestep",
71
                                             "timestep_limiter",
72
73
74
75
76
77
78
                                             "send",
                                             "recv",
                                             "grav_long_range",
                                             "grav_mm",
                                             "grav_down_in",
                                             "grav_down",
                                             "grav_mesh",
79
                                             "grav_end_force",
80
81
                                             "cooling",
                                             "star_formation",
82
83
                                             "star_formation_in",
                                             "star_formation_out",
84
                                             "logger",
85
86
                                             "stars_in",
                                             "stars_out",
87
88
                                             "stars_ghost_in",
                                             "stars_ghost",
James Willis's avatar
James Willis committed
89
                                             "stars_ghost_out",
90
                                             "stars_sort",
James Willis's avatar
James Willis committed
91
92
                                             "fof_self",
                                             "fof_pair"};
93

94
/* Sub-task type names. */
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
const char *subtaskID_names[task_subtype_count] = {"none",
                                                   "density",
                                                   "gradient",
                                                   "force",
                                                   "limiter",
                                                   "grav",
                                                   "external_grav",
                                                   "tend_part",
                                                   "tend_gpart",
                                                   "tend_spart",
                                                   "xv",
                                                   "rho",
                                                   "gpart",
                                                   "multipole",
                                                   "spart",
                                                   "stars_density",
                                                   "stars_feedback"};
112

113
114
115
116
117
#ifdef WITH_MPI
/* MPI communicators for the subtypes. */
MPI_Comm subtaskMPI_comms[task_subtype_count];
#endif

118
119
/**
 * @brief Computes the overlap between the parts array of two given cells.
120
 *
Matthieu Schaller's avatar
Matthieu Schaller committed
121
122
123
 * @param TYPE is the type of parts (e.g. #part, #gpart, #spart)
 * @param ARRAY is the array of this specific type.
 * @param COUNT is the number of elements in the array.
124
 */
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
#define TASK_CELL_OVERLAP(TYPE, ARRAY, COUNT)                               \
  __attribute__((always_inline))                                            \
      INLINE static size_t task_cell_overlap_##TYPE(                        \
          const struct cell *restrict ci, const struct cell *restrict cj) { \
                                                                            \
    if (ci == NULL || cj == NULL) return 0;                                 \
                                                                            \
    if (ci->ARRAY <= cj->ARRAY &&                                           \
        ci->ARRAY + ci->COUNT >= cj->ARRAY + cj->COUNT) {                   \
      return cj->COUNT;                                                     \
    } else if (cj->ARRAY <= ci->ARRAY &&                                    \
               cj->ARRAY + cj->COUNT >= ci->ARRAY + ci->COUNT) {            \
      return ci->COUNT;                                                     \
    }                                                                       \
                                                                            \
    return 0;                                                               \
  }
142

143
TASK_CELL_OVERLAP(part, hydro.parts, hydro.count);
144
145
TASK_CELL_OVERLAP(gpart, grav.parts, grav.count);
TASK_CELL_OVERLAP(spart, stars.parts, stars.count);
Loic Hausammann's avatar
Loic Hausammann committed
146

147
148
149
150
151
/**
 * @brief Returns the #task_actions for a given task.
 *
 * @param t The #task.
 */
152
153
__attribute__((always_inline)) INLINE static enum task_actions task_acts_on(
    const struct task *t) {
154
155
156
157
158
159
160

  switch (t->type) {

    case task_type_none:
      return task_action_none;
      break;

161
    case task_type_drift_part:
162
163
    case task_type_sort:
    case task_type_ghost:
164
    case task_type_extra_ghost:
165
    case task_type_timestep_limiter:
Stefan Arridge's avatar
Stefan Arridge committed
166
    case task_type_cooling:
167
    case task_type_end_hydro_force:
168
169
170
      return task_action_part;
      break;

171
172
173
    case task_type_star_formation:
      return task_action_all;

174
    case task_type_drift_spart:
175
    case task_type_stars_ghost:
Loic Hausammann's avatar
Loic Hausammann committed
176
    case task_type_stars_sort:
Loic Hausammann's avatar
Loic Hausammann committed
177
178
179
      return task_action_spart;
      break;

180
181
182
183
184
185
186
    case task_type_self:
    case task_type_pair:
    case task_type_sub_self:
    case task_type_sub_pair:
      switch (t->subtype) {

        case task_subtype_density:
187
        case task_subtype_gradient:
188
        case task_subtype_force:
189
        case task_subtype_limiter:
190
191
192
          return task_action_part;
          break;

193
        case task_subtype_stars_density:
Alexei Borissov's avatar
Alexei Borissov committed
194
        case task_subtype_stars_feedback:
195
196
          return task_action_all;
          break;
197

198
        case task_subtype_grav:
199
        case task_subtype_external_grav:
200
201
202
203
          return task_action_gpart;
          break;

        default:
204
205
206
207
#ifdef SWIFT_DEBUG_CHECKS
          error("Unknown task_action for task %s/%s", taskID_names[t->type],
                subtaskID_names[t->subtype]);
#endif
208
209
210
211
212
          return task_action_none;
          break;
      }
      break;

213
214
    case task_type_kick1:
    case task_type_kick2:
Loikki's avatar
Loikki committed
215
    case task_type_logger:
James Willis's avatar
James Willis committed
216
217
    case task_type_fof_self:
    case task_type_fof_pair:
218
    case task_type_timestep:
219
220
    case task_type_send:
    case task_type_recv:
221
      if (t->ci->hydro.count > 0 && t->ci->grav.count > 0)
222
        return task_action_all;
223
      else if (t->ci->hydro.count > 0)
224
        return task_action_part;
225
      else if (t->ci->grav.count > 0)
226
        return task_action_gpart;
227
228
      else {
#ifdef SWIFT_DEBUG_CHECKS
229
        error("Task without particles");
230
231
#endif
      }
232
233
      break;

234
    case task_type_init_grav:
235
    case task_type_grav_mm:
236
    case task_type_grav_long_range:
237
238
239
      return task_action_multipole;
      break;

240
    case task_type_drift_gpart:
241
    case task_type_grav_down:
242
    case task_type_end_grav_force:
243
    case task_type_grav_mesh:
244
      return task_action_gpart;
245
      break;
246

247
    default:
248
249
250
251
#ifdef SWIFT_DEBUG_CHECKS
      error("Unknown task_action for task %s/%s", taskID_names[t->type],
            subtaskID_names[t->subtype]);
#endif
252
253
254
      return task_action_none;
      break;
  }
255

256
257
258
259
260
#ifdef SWIFT_DEBUG_CHECKS
  error("Unknown task_action for task %s/%s", taskID_names[t->type],
        subtaskID_names[t->subtype]);
#endif
  /* Silence compiler warnings. We should never get here. */
261
  return task_action_none;
262
263
}

264
265
266
267
268
269
270
/**
 * @brief Compute the Jaccard similarity of the data used by two
 *        different tasks.
 *
 * @param ta The first #task.
 * @param tb The second #task.
 */
271
272
float task_overlap(const struct task *restrict ta,
                   const struct task *restrict tb) {
273
274
275
276
277
278

  if (ta == NULL || tb == NULL) return 0.f;

  const enum task_actions ta_act = task_acts_on(ta);
  const enum task_actions tb_act = task_acts_on(tb);

279
280
  /* First check if any of the two tasks are of a type that don't
     use cells. */
281
282
283
284
285
  if (ta_act == task_action_none || tb_act == task_action_none) return 0.f;

  const int ta_part = (ta_act == task_action_part || ta_act == task_action_all);
  const int ta_gpart =
      (ta_act == task_action_gpart || ta_act == task_action_all);
286
287
  const int ta_spart =
      (ta_act == task_action_spart || ta_act == task_action_all);
288
289
290
  const int tb_part = (tb_act == task_action_part || tb_act == task_action_all);
  const int tb_gpart =
      (tb_act == task_action_gpart || tb_act == task_action_all);
291
292
  const int tb_spart =
      (tb_act == task_action_spart || tb_act == task_action_all);
293
294
295
296
297
298

  /* In the case where both tasks act on parts */
  if (ta_part && tb_part) {

    /* Compute the union of the cell data. */
    size_t size_union = 0;
299
300
301
302
    if (ta->ci != NULL) size_union += ta->ci->hydro.count;
    if (ta->cj != NULL) size_union += ta->cj->hydro.count;
    if (tb->ci != NULL) size_union += tb->ci->hydro.count;
    if (tb->cj != NULL) size_union += tb->cj->hydro.count;
303

304
    if (size_union == 0) return 0.f;
305

306
307
308
309
310
311
312
313
314
315
316
317
318
319
    /* Compute the intersection of the cell data. */
    const size_t size_intersect = task_cell_overlap_part(ta->ci, tb->ci) +
                                  task_cell_overlap_part(ta->ci, tb->cj) +
                                  task_cell_overlap_part(ta->cj, tb->ci) +
                                  task_cell_overlap_part(ta->cj, tb->cj);

    return ((float)size_intersect) / (size_union - size_intersect);
  }

  /* In the case where both tasks act on gparts */
  else if (ta_gpart && tb_gpart) {

    /* Compute the union of the cell data. */
    size_t size_union = 0;
320
321
322
323
    if (ta->ci != NULL) size_union += ta->ci->grav.count;
    if (ta->cj != NULL) size_union += ta->cj->grav.count;
    if (tb->ci != NULL) size_union += tb->ci->grav.count;
    if (tb->cj != NULL) size_union += tb->cj->grav.count;
324

325
326
    if (size_union == 0) return 0.f;

327
328
329
330
331
332
333
334
    /* Compute the intersection of the cell data. */
    const size_t size_intersect = task_cell_overlap_gpart(ta->ci, tb->ci) +
                                  task_cell_overlap_gpart(ta->ci, tb->cj) +
                                  task_cell_overlap_gpart(ta->cj, tb->ci) +
                                  task_cell_overlap_gpart(ta->cj, tb->cj);

    return ((float)size_intersect) / (size_union - size_intersect);
  }
335

Loic Hausammann's avatar
Loic Hausammann committed
336
337
338
339
340
  /* In the case where both tasks act on sparts */
  else if (ta_spart && tb_spart) {

    /* Compute the union of the cell data. */
    size_t size_union = 0;
341
342
343
344
    if (ta->ci != NULL) size_union += ta->ci->stars.count;
    if (ta->cj != NULL) size_union += ta->cj->stars.count;
    if (tb->ci != NULL) size_union += tb->ci->stars.count;
    if (tb->cj != NULL) size_union += tb->cj->stars.count;
Loic Hausammann's avatar
Loic Hausammann committed
345

346
    if (size_union == 0) return 0.f;
Loic Hausammann's avatar
Loic Hausammann committed
347

Loic Hausammann's avatar
Loic Hausammann committed
348
349
350
351
352
353
354
355
356
    /* Compute the intersection of the cell data. */
    const size_t size_intersect = task_cell_overlap_spart(ta->ci, tb->ci) +
                                  task_cell_overlap_spart(ta->ci, tb->cj) +
                                  task_cell_overlap_spart(ta->cj, tb->ci) +
                                  task_cell_overlap_spart(ta->cj, tb->cj);

    return ((float)size_intersect) / (size_union - size_intersect);
  }

357
358
  /* Else, no overlap */
  return 0.f;
359
}
360

361
362
/**
 * @brief Unlock the cell held by this task.
363
 *
364
365
 * @param t The #task.
 */
366
367
void task_unlock(struct task *t) {

368
369
  const enum task_types type = t->type;
  const enum task_subtypes subtype = t->subtype;
370
371
  struct cell *ci = t->ci, *cj = t->cj;

372
  /* Act based on task type. */
373
374
  switch (type) {

375
376
    case task_type_kick1:
    case task_type_kick2:
377
    case task_type_logger:
378
    case task_type_timestep:
379
380
381
      cell_unlocktree(ci);
      cell_gunlocktree(ci);
      break;
Matthieu Schaller's avatar
Matthieu Schaller committed
382

383
    case task_type_drift_part:
384
    case task_type_sort:
385
    case task_type_ghost:
386
    case task_type_end_hydro_force:
387
    case task_type_timestep_limiter:
388
389
390
      cell_unlocktree(ci);
      break;

391
    case task_type_drift_gpart:
392
    case task_type_grav_mesh:
393
    case task_type_end_grav_force:
394
395
396
      cell_gunlocktree(ci);
      break;

Loic Hausammann's avatar
Loic Hausammann committed
397
398
399
400
    case task_type_stars_sort:
      cell_sunlocktree(ci);
      break;

401
    case task_type_self:
402
    case task_type_sub_self:
403
404
      if (subtype == task_subtype_grav) {
        cell_gunlocktree(ci);
405
        cell_munlocktree(ci);
Loic Hausammann's avatar
Loic Hausammann committed
406
407
      } else if (subtype == task_subtype_stars_density) {
        cell_sunlocktree(ci);
Alexei Borissov's avatar
Alexei Borissov committed
408
409
410
      } else if (subtype == task_subtype_stars_feedback) {
        cell_sunlocktree(ci);
        cell_unlocktree(ci);
411
412
413
      } else {
        cell_unlocktree(ci);
      }
414
      break;
415

416
    case task_type_pair:
417
    case task_type_sub_pair:
418
419
420
      if (subtype == task_subtype_grav) {
        cell_gunlocktree(ci);
        cell_gunlocktree(cj);
421
422
        cell_munlocktree(ci);
        cell_munlocktree(cj);
Loic Hausammann's avatar
Loic Hausammann committed
423
424
425
      } else if (subtype == task_subtype_stars_density) {
        cell_sunlocktree(ci);
        cell_sunlocktree(cj);
Alexei Borissov's avatar
Alexei Borissov committed
426
427
428
429
430
      } else if (subtype == task_subtype_stars_feedback) {
        cell_sunlocktree(ci);
        cell_sunlocktree(cj);
        cell_unlocktree(ci);
        cell_unlocktree(cj);
431
432
433
434
435
436
      } else {
        cell_unlocktree(ci);
        cell_unlocktree(cj);
      }
      break;

437
    case task_type_grav_down:
438
      cell_gunlocktree(ci);
439
440
441
      cell_munlocktree(ci);
      break;

442
    case task_type_grav_long_range:
443
      cell_munlocktree(ci);
444
      break;
445

446
447
448
449
450
    case task_type_grav_mm:
      cell_munlocktree(ci);
      cell_munlocktree(cj);
      break;

451
452
453
454
    case task_type_star_formation:
      cell_unlocktree(ci);
      cell_sunlocktree(ci);
      cell_gunlocktree(ci);
455
      break;
456

457
458
459
460
    default:
      break;
  }
}
461
462
463
464
465
466

/**
 * @brief Try to lock the cells associated with this task.
 *
 * @param t the #task.
 */
467
468
int task_lock(struct task *t) {

469
470
  const enum task_types type = t->type;
  const enum task_subtypes subtype = t->subtype;
471
  struct cell *ci = t->ci, *cj = t->cj;
472
473
474
475
#ifdef WITH_MPI
  int res = 0, err = 0;
  MPI_Status stat;
#endif
476

477
  switch (type) {
478

479
480
481
    /* Communication task? */
    case task_type_recv:
    case task_type_send:
482
#ifdef WITH_MPI
483
484
485
486
487
      /* Check the status of the MPI request. */
      if ((err = MPI_Test(&t->req, &res, &stat)) != MPI_SUCCESS) {
        char buff[MPI_MAX_ERROR_STRING];
        int len;
        MPI_Error_string(err, buff, &len);
488
489
490
491
        error(
            "Failed to test request on send/recv task (type=%s/%s tag=%lld, "
            "%s).",
            taskID_names[t->type], subtaskID_names[t->subtype], t->flags, buff);
492
493
      }
      return res;
494
#else
495
      error("SWIFT was not compiled with MPI support.");
496
#endif
497
      break;
498

499
500
    case task_type_kick1:
    case task_type_kick2:
Loikki's avatar
Loikki committed
501
    case task_type_logger:
502
    case task_type_timestep:
503
      if (ci->hydro.hold || ci->grav.phold) return 0;
504
505
      if (cell_locktree(ci) != 0) return 0;
      if (cell_glocktree(ci) != 0) {
Matthieu Schaller's avatar
Matthieu Schaller committed
506
507
        cell_unlocktree(ci);
        return 0;
508
509
510
      }
      break;

511
    case task_type_drift_part:
512
    case task_type_sort:
513
    case task_type_ghost:
514
    case task_type_end_hydro_force:
515
    case task_type_timestep_limiter:
516
      if (ci->hydro.hold) return 0;
517
518
      if (cell_locktree(ci) != 0) return 0;
      break;
519

Loic Hausammann's avatar
Loic Hausammann committed
520
521
522
523
524
    case task_type_stars_sort:
      if (ci->stars.hold) return 0;
      if (cell_slocktree(ci) != 0) return 0;
      break;

525
    case task_type_drift_gpart:
526
    case task_type_end_grav_force:
527
    case task_type_grav_mesh:
528
      if (ci->grav.phold) return 0;
529
530
531
      if (cell_glocktree(ci) != 0) return 0;
      break;

532
    case task_type_self:
533
    case task_type_sub_self:
534
      if (subtype == task_subtype_grav) {
535
        /* Lock the gparts and the m-pole */
536
        if (ci->grav.phold || ci->grav.mhold) return 0;
537
538
539
540
541
542
        if (cell_glocktree(ci) != 0)
          return 0;
        else if (cell_mlocktree(ci) != 0) {
          cell_gunlocktree(ci);
          return 0;
        }
Loic Hausammann's avatar
Loic Hausammann committed
543
544
545
      } else if (subtype == task_subtype_stars_density) {
        if (ci->stars.hold) return 0;
        if (cell_slocktree(ci) != 0) return 0;
Alexei Borissov's avatar
Alexei Borissov committed
546
547
548
549
550
551
552
553
554
      } else if (subtype == task_subtype_stars_feedback) {
        if (ci->stars.hold) return 0;
        if (ci->hydro.hold) return 0;
        if (cell_slocktree(ci) != 0) return 0;
        if (cell_locktree(ci) != 0) {
          cell_sunlocktree(ci);
          return 0;
        }
      } else { /* subtype == hydro */
Loic Hausammann's avatar
Loic Hausammann committed
555
        if (ci->hydro.hold) return 0;
556
557
558
        if (cell_locktree(ci) != 0) return 0;
      }
      break;
559

560
    case task_type_pair:
561
    case task_type_sub_pair:
562
      if (subtype == task_subtype_grav) {
563
        /* Lock the gparts and the m-pole in both cells */
564
        if (ci->grav.phold || cj->grav.phold) return 0;
565
566
567
568
        if (cell_glocktree(ci) != 0) return 0;
        if (cell_glocktree(cj) != 0) {
          cell_gunlocktree(ci);
          return 0;
569
570
571
572
573
574
575
576
577
        } else if (cell_mlocktree(ci) != 0) {
          cell_gunlocktree(ci);
          cell_gunlocktree(cj);
          return 0;
        } else if (cell_mlocktree(cj) != 0) {
          cell_gunlocktree(ci);
          cell_gunlocktree(cj);
          cell_munlocktree(ci);
          return 0;
578
        }
Loic Hausammann's avatar
Loic Hausammann committed
579
580
581
582
583
584
585
      } else if (subtype == task_subtype_stars_density) {
        if (ci->stars.hold || cj->stars.hold) return 0;
        if (cell_slocktree(ci) != 0) return 0;
        if (cell_slocktree(cj) != 0) {
          cell_sunlocktree(ci);
          return 0;
        }
Alexei Borissov's avatar
Alexei Borissov committed
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
      } else if (subtype == task_subtype_stars_feedback) {
        /* Lock the stars and the gas particles in both cells */
        if (ci->stars.hold || cj->stars.hold) return 0;
        if (ci->hydro.hold || cj->hydro.hold) return 0;
        if (cell_slocktree(ci) != 0) return 0;
        if (cell_slocktree(cj) != 0) {
          cell_sunlocktree(ci);
          return 0;
        }
        if (cell_locktree(ci) != 0) {
          cell_sunlocktree(ci);
          cell_sunlocktree(cj);
          return 0;
        }
        if (cell_locktree(cj) != 0) {
          cell_sunlocktree(ci);
          cell_sunlocktree(cj);
          cell_unlocktree(ci);
          return 0;
        }
      } else { /* subtype == hydro */
607
        /* Lock the parts in both cells */
608
        if (ci->hydro.hold || cj->hydro.hold) return 0;
609
610
611
612
613
614
615
        if (cell_locktree(ci) != 0) return 0;
        if (cell_locktree(cj) != 0) {
          cell_unlocktree(ci);
          return 0;
        }
      }
      break;
616

617
618
    case task_type_grav_down:
      /* Lock the gparts and the m-poles */
619
      if (ci->grav.phold || ci->grav.mhold) return 0;
620
621
622
623
624
625
626
627
      if (cell_glocktree(ci) != 0)
        return 0;
      else if (cell_mlocktree(ci) != 0) {
        cell_gunlocktree(ci);
        return 0;
      }
      break;

628
    case task_type_grav_long_range:
629
      /* Lock the m-poles */
630
      if (ci->grav.mhold) return 0;
631
      if (cell_mlocktree(ci) != 0) return 0;
Matthieu Schaller's avatar
Matthieu Schaller committed
632
633
      break;

634
635
    case task_type_grav_mm:
      /* Lock both m-poles */
636
      if (ci->grav.mhold || cj->grav.mhold) return 0;
637
638
639
640
641
      if (cell_mlocktree(ci) != 0) return 0;
      if (cell_mlocktree(cj) != 0) {
        cell_munlocktree(ci);
        return 0;
      }
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
      break;

    case task_type_star_formation:
      /* Lock the gas, gravity and star particles */
      if (ci->hydro.hold || ci->stars.hold || ci->grav.phold) return 0;
      if (cell_locktree(ci) != 0) return 0;
      if (cell_slocktree(ci) != 0) {
        cell_unlocktree(ci);
        return 0;
      }
      if (cell_glocktree(ci) != 0) {
        cell_unlocktree(ci);
        cell_sunlocktree(ci);
        return 0;
      }
657

658
659
    default:
      break;
660
661
662
663
664
  }

  /* If we made it this far, we've got a lock. */
  return 1;
}
665

666
667
668
669
670
671
672
673
674
675
676
/**
 * @brief Print basic information about a task.
 *
 * @param t The #task.
 */
void task_print(const struct task *t) {

  message("Type:'%s' sub_type:'%s' wait=%d nr_unlocks=%d skip=%d",
          taskID_names[t->type], subtaskID_names[t->subtype], t->wait,
          t->nr_unlock_tasks, t->skip);
}
677

678
679
680
681
682
683
/**
 * @brief Get the group name of a task.
 *
 * This is used to group tasks with similar actions in the task dependency
 * graph.
 *
684
 * @param type The #task type.
685
 * @param subtype The #task subtype.
686
 * @param cluster (return) The group name (should be allocated)
687
 */
688
void task_get_group_name(int type, int subtype, char *cluster) {
689

690
691
  if (type == task_type_grav_long_range || type == task_type_grav_mm ||
      type == task_type_grav_mesh) {
692
693
694
695
696

    strcpy(cluster, "Gravity");
    return;
  }

697
  switch (subtype) {
698
699
700
701
    case task_subtype_density:
      strcpy(cluster, "Density");
      break;
    case task_subtype_gradient:
702
      if (type == task_type_send || type == task_type_recv) {
703
704
705
        strcpy(cluster, "None");
      } else {
        strcpy(cluster, "Gradient");
706
      }
707
708
709
710
711
712
713
      break;
    case task_subtype_force:
      strcpy(cluster, "Force");
      break;
    case task_subtype_grav:
      strcpy(cluster, "Gravity");
      break;
714
715
716
    case task_subtype_limiter:
      strcpy(cluster, "Timestep_limiter");
      break;
717
    case task_subtype_stars_density:
718
719
720
721
      strcpy(cluster, "StarsDensity");
      break;
    case task_subtype_stars_feedback:
      strcpy(cluster, "StarsFeedback");
722
723
724
725
726
727
728
729
730
731
732
733
734
735
      break;
    default:
      strcpy(cluster, "None");
      break;
  }
}

/**
 * @brief Generate the full name of a #task.
 *
 * @param type The #task type.
 * @param subtype The #task type.
 * @param name (return) The formatted string
 */
736
void task_get_full_name(int type, int subtype, char *name) {
737
738
739

#ifdef SWIFT_DEBUG_CHECKS
  /* Check input */
740
  if (type >= task_type_count) error("Unknown task type %i", type);
741

742
  if (subtype >= task_subtype_count)
743
744
745
746
747
748
749
750
751
752
    error("Unknown task subtype %i with type %s", subtype, taskID_names[type]);
#endif

  /* Full task name */
  if (subtype == task_subtype_none)
    sprintf(name, "%s", taskID_names[type]);
  else
    sprintf(name, "%s_%s", taskID_names[type], subtaskID_names[subtype]);
}

753
754
755
756
757
758
759
760
761
762
#ifdef WITH_MPI
/**
 * @brief Create global communicators for each of the subtasks.
 */
void task_create_mpi_comms(void) {
  for (int i = 0; i < task_subtype_count; i++) {
    MPI_Comm_dup(MPI_COMM_WORLD, &subtaskMPI_comms[i]);
  }
}
#endif
763
764

/**
765
766
 * @brief dump all the tasks of all the known engines into a file for
 * postprocessing.
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
 *
 * Dumps the information to a file "thread_info-stepn.dat" where n is the
 * given step value, or "thread_info_MPI-stepn.dat", if we are running
 * under MPI. Note if running under MPIU all the ranks are dumped into this
 * one file, which has an additional field to identify the rank.
 *
 * @param e the #engine
 * @param step the current step.
 */
void task_dump_all(struct engine *e, int step) {

#ifdef SWIFT_DEBUG_TASKS

  /* Need this to convert ticks to seconds. */
  unsigned long long cpufreq = clocks_get_cpufreq();

#ifdef WITH_MPI
  /* Make sure output file is empty, only on one rank. */
  char dumpfile[35];
  snprintf(dumpfile, sizeof(dumpfile), "thread_info_MPI-step%d.dat", step);
  FILE *file_thread;
  if (engine_rank == 0) {
    file_thread = fopen(dumpfile, "w");
    fclose(file_thread);
  }
  MPI_Barrier(MPI_COMM_WORLD);

  for (int i = 0; i < e->nr_nodes; i++) {

    /* Rank 0 decides the index of the writing node, this happens
     * one-by-one. */
    int kk = i;
    MPI_Bcast(&kk, 1, MPI_INT, 0, MPI_COMM_WORLD);

    if (i == engine_rank) {

      /* Open file and position at end. */
      file_thread = fopen(dumpfile, "a");

      /* Add some information to help with the plots and conversion of ticks to
       * seconds. */
      fprintf(file_thread, " %03d 0 0 0 0 %lld %lld %lld %lld %lld 0 0 %lld\n",
Josh Borrow's avatar
Josh Borrow committed
809
810
              engine_rank, (long long int)e->tic_step,
              (long long int)e->toc_step, e->updates, e->g_updates,
811
812
813
814
815
816
817
818
              e->s_updates, cpufreq);
      int count = 0;
      for (int l = 0; l < e->sched.nr_tasks; l++) {
        if (!e->sched.tasks[l].implicit && e->sched.tasks[l].toc != 0) {
          fprintf(
              file_thread, " %03i %i %i %i %i %lli %lli %i %i %i %i %lli %i\n",
              engine_rank, e->sched.tasks[l].rid, e->sched.tasks[l].type,
              e->sched.tasks[l].subtype, (e->sched.tasks[l].cj == NULL),
Josh Borrow's avatar
Josh Borrow committed
819
820
              (long long int)e->sched.tasks[l].tic,
              (long long int)e->sched.tasks[l].toc,
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
              (e->sched.tasks[l].ci != NULL) ? e->sched.tasks[l].ci->hydro.count
                                             : 0,
              (e->sched.tasks[l].cj != NULL) ? e->sched.tasks[l].cj->hydro.count
                                             : 0,
              (e->sched.tasks[l].ci != NULL) ? e->sched.tasks[l].ci->grav.count
                                             : 0,
              (e->sched.tasks[l].cj != NULL) ? e->sched.tasks[l].cj->grav.count
                                             : 0,
              e->sched.tasks[l].flags, e->sched.tasks[l].sid);
        }
        count++;
      }
      fclose(file_thread);
    }

    /* And we wait for all to synchronize. */
    MPI_Barrier(MPI_COMM_WORLD);
  }

#else
  /* Non-MPI, so just a single engine's worth of tasks to dump. */
  char dumpfile[32];
  snprintf(dumpfile, sizeof(dumpfile), "thread_info-step%d.dat", step);
  FILE *file_thread;
  file_thread = fopen(dumpfile, "w");

  /* Add some information to help with the plots and conversion of ticks to
   * seconds. */
  fprintf(file_thread, " %d %d %d %d %lld %lld %lld %lld %lld %d %lld\n", -2,
850
851
          -1, -1, 1, (unsigned long long)e->tic_step,
          (unsigned long long)e->toc_step, e->updates, e->g_updates,
852
853
854
855
856
857
858
          e->s_updates, 0, cpufreq);
  for (int l = 0; l < e->sched.nr_tasks; l++) {
    if (!e->sched.tasks[l].implicit && e->sched.tasks[l].toc != 0) {
      fprintf(
          file_thread, " %i %i %i %i %lli %lli %i %i %i %i %i\n",
          e->sched.tasks[l].rid, e->sched.tasks[l].type,
          e->sched.tasks[l].subtype, (e->sched.tasks[l].cj == NULL),
Josh Borrow's avatar
Josh Borrow committed
859
860
          (unsigned long long)e->sched.tasks[l].tic,
          (unsigned long long)e->sched.tasks[l].toc,
861
862
863
864
865
866
867
868
869
870
871
          (e->sched.tasks[l].ci == NULL) ? 0
                                         : e->sched.tasks[l].ci->hydro.count,
          (e->sched.tasks[l].cj == NULL) ? 0
                                         : e->sched.tasks[l].cj->hydro.count,
          (e->sched.tasks[l].ci == NULL) ? 0 : e->sched.tasks[l].ci->grav.count,
          (e->sched.tasks[l].cj == NULL) ? 0 : e->sched.tasks[l].cj->grav.count,
          e->sched.tasks[l].sid);
    }
  }
  fclose(file_thread);
#endif  // WITH_MPI
872
873
874
875
876
#endif  // SWIFT_DEBUG_TASKS
}

/**
 * @brief Generate simple statistics about the times used by the tasks of
877
878
879
 *        all the engines and write these into two format, a human readable
 *        version for debugging and one intented for inclusion as the fixed
 *        costs for repartitioning.
880
 *
881
882
883
884
 * Note that when running under MPI all the tasks can be summed into this single
 * file. In the fuller, human readable file, the statistics included are the
 * number of task of each type/subtype followed by the minimum, maximum, mean
 * and total time, in millisec and then the fixed costs value.
885
 *
886
887
888
 * If header is set, only the fixed costs value is written into the output
 * file in a format that is suitable for inclusion in SWIFT (as
 * partition_fixed_costs.h).
889
 *
890
 * @param dumpfile name of the file for the output.
891
 * @param e the #engine
892
893
894
 * @param header whether to write a header include file.
 * @param allranks do the statistics over all ranks, if not just the current
 *                 one, only used if header is false.
895
 */
Peter W. Draper's avatar
Peter W. Draper committed
896
897
void task_dump_stats(const char *dumpfile, struct engine *e, int header,
                     int allranks) {
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936

  /* Need arrays for sum, min and max across all types and subtypes. */
  double sum[task_type_count][task_subtype_count];
  double min[task_type_count][task_subtype_count];
  double max[task_type_count][task_subtype_count];
  int count[task_type_count][task_subtype_count];

  for (int j = 0; j < task_type_count; j++) {
    for (int k = 0; k < task_subtype_count; k++) {
      sum[j][k] = 0.0;
      count[j][k] = 0;
      min[j][k] = DBL_MAX;
      max[j][k] = 0.0;
    }
  }

  double total[1] = {0.0};
  for (int l = 0; l < e->sched.nr_tasks; l++) {
    int type = e->sched.tasks[l].type;

    /* Skip implicit tasks, tasks that didn't run and MPI send/recv as these
     * are not interesting (or meaningfully measured). */
    if (!e->sched.tasks[l].implicit && e->sched.tasks[l].toc != 0 &&
        type != task_type_send && type != task_type_recv) {
      int subtype = e->sched.tasks[l].subtype;

      double dt = e->sched.tasks[l].toc - e->sched.tasks[l].tic;
      sum[type][subtype] += dt;
      count[type][subtype] += 1;
      if (dt < min[type][subtype]) {
        min[type][subtype] = dt;
      }
      if (dt > max[type][subtype]) {
        max[type][subtype] = dt;
      }
      total[0] += dt;
    }
  }

937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
#ifdef WITH_MPI
  if (allranks || header) {
    /* Get these from all ranks for output from rank 0. Could wrap these into a
     * single operation. */
    size_t size = task_type_count * task_subtype_count;
    int res = MPI_Reduce((engine_rank == 0 ? MPI_IN_PLACE : sum), sum, size,
                         MPI_DOUBLE, MPI_SUM, 0, MPI_COMM_WORLD);
    if (res != MPI_SUCCESS) mpi_error(res, "Failed to reduce task sums");

    res = MPI_Reduce((engine_rank == 0 ? MPI_IN_PLACE : count), count, size,
                     MPI_INT, MPI_SUM, 0, MPI_COMM_WORLD);
    if (res != MPI_SUCCESS) mpi_error(res, "Failed to reduce task counts");

    res = MPI_Reduce((engine_rank == 0 ? MPI_IN_PLACE : min), min, size,
                     MPI_DOUBLE, MPI_MIN, 0, MPI_COMM_WORLD);
    if (res != MPI_SUCCESS) mpi_error(res, "Failed to reduce task minima");

    res = MPI_Reduce((engine_rank == 0 ? MPI_IN_PLACE : max), max, size,
                     MPI_DOUBLE, MPI_MAX, 0, MPI_COMM_WORLD);
    if (res != MPI_SUCCESS) mpi_error(res, "Failed to reduce task maxima");

    res = MPI_Reduce((engine_rank == 0 ? MPI_IN_PLACE : total), total, 1,
                     MPI_DOUBLE, MPI_SUM, 0, MPI_COMM_WORLD);
    if (res != MPI_SUCCESS) mpi_error(res, "Failed to reduce task total time");
  }
962

963
  if (!allranks || (engine_rank == 0 && (allranks || header))) {
964
965
966
#endif

    FILE *dfile = fopen(dumpfile, "w");
967
968
969
970
971
972
    if (header) {
      fprintf(dfile, "/* use as src/partition_fixed_costs.h */\n");
      fprintf(dfile, "#define HAVE_FIXED_COSTS 1\n");
    } else {
      fprintf(dfile, "# task ntasks min max sum mean percent fixed_cost\n");
    }
973
974
975
976
977
978
979

    for (int j = 0; j < task_type_count; j++) {
      const char *taskID = taskID_names[j];
      for (int k = 0; k < task_subtype_count; k++) {
        if (sum[j][k] > 0.0) {
          double mean = sum[j][k] / (double)count[j][k];
          double perc = 100.0 * sum[j][k] / total[0];
980
981
982
983

          /* Fixed cost is in .1ns as we want to compare between runs in
           * some absolute units. */
          int fixed_cost = (int)(clocks_from_ticks(mean) * 10000.f);
984
985
986
987
988
989
990
991
          if (header) {
            fprintf(dfile, "repartition_costs[%d][%d] = %10d; /* %s/%s */\n", j,
                    k, fixed_cost, taskID, subtaskID_names[k]);
          } else {
            fprintf(dfile,
                    "%15s/%-10s %10d %14.4f %14.4f %14.4f %14.4f %14.4f %10d\n",
                    taskID, subtaskID_names[k], count[j][k],
                    clocks_from_ticks(min[j][k]), clocks_from_ticks(max[j][k]),
Peter W. Draper's avatar
Peter W. Draper committed
992
993
                    clocks_from_ticks(sum[j][k]), clocks_from_ticks(mean), perc,
                    fixed_cost);
994
          }
995
996
997
998
999
1000
1001
        }
      }
    }
    fclose(dfile);
#ifdef WITH_MPI
  }
#endif
1002
}