1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
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
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
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
809
810
811
812
813
814
815
816
817
818
819
820
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
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
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
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
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
|
<!DOCTYPE html>
<html lang="en" data-content_root="../" >
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Changes: 3.19 — PETSc 3.23.1 documentation</title>
<script data-cfasync="false">
document.documentElement.dataset.mode = localStorage.getItem("mode") || "";
document.documentElement.dataset.theme = localStorage.getItem("theme") || "light";
</script>
<!-- Loaded before other Sphinx assets -->
<link href="../_static/styles/theme.css?digest=bd9e20870c6007c4c509" rel="stylesheet" />
<link href="../_static/styles/bootstrap.css?digest=bd9e20870c6007c4c509" rel="stylesheet" />
<link href="../_static/styles/pydata-sphinx-theme.css?digest=bd9e20870c6007c4c509" rel="stylesheet" />
<link href="../_static/vendor/fontawesome/6.5.1/css/all.min.css?digest=bd9e20870c6007c4c509" rel="stylesheet" />
<link rel="preload" as="font" type="font/woff2" crossorigin href="../_static/vendor/fontawesome/6.5.1/webfonts/fa-solid-900.woff2" />
<link rel="preload" as="font" type="font/woff2" crossorigin href="../_static/vendor/fontawesome/6.5.1/webfonts/fa-brands-400.woff2" />
<link rel="preload" as="font" type="font/woff2" crossorigin href="../_static/vendor/fontawesome/6.5.1/webfonts/fa-regular-400.woff2" />
<link rel="stylesheet" type="text/css" href="../_static/pygments.css?v=8f2a1f02" />
<link rel="stylesheet" type="text/css" href="../_static/copybutton.css?v=76b2166b" />
<link rel="stylesheet" type="text/css" href="../_static/sphinx-design.min.css?v=87e54e7c" />
<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/katex@0.16.10/dist/katex.min.css" />
<link rel="stylesheet" type="text/css" href="../_static/katex-math.css?v=91adb8b6" />
<link rel="stylesheet" type="text/css" href="../_static/css/custom.css?v=dbe1606d" />
<!-- Pre-loaded scripts that we'll load fully later -->
<link rel="preload" as="script" href="../_static/scripts/bootstrap.js?digest=bd9e20870c6007c4c509" />
<link rel="preload" as="script" href="../_static/scripts/pydata-sphinx-theme.js?digest=bd9e20870c6007c4c509" />
<script src="../_static/vendor/fontawesome/6.5.1/js/all.min.js?digest=bd9e20870c6007c4c509"></script>
<script src="../_static/documentation_options.js?v=34da53a5"></script>
<script src="../_static/doctools.js?v=9a2dae69"></script>
<script src="../_static/sphinx_highlight.js?v=dc90522c"></script>
<script src="../_static/clipboard.min.js?v=a7894cd8"></script>
<script src="../_static/copybutton.js?v=a56c686a"></script>
<script src="../_static/design-tabs.js?v=f930bc37"></script>
<script src="../_static/katex.min.js?v=be8ff15f"></script>
<script src="../_static/auto-render.min.js?v=ad136472"></script>
<script src="../_static/katex_autorenderer.js?v=bebc588a"></script>
<script>DOCUMENTATION_OPTIONS.pagename = 'changes/319';</script>
<link rel="icon" href="../_static/petsc_favicon.png"/>
<link rel="index" title="Index" href="../genindex.html" />
<link rel="search" title="Search" href="../search.html" />
<link rel="next" title="Changes: 3.18" href="318.html" />
<link rel="prev" title="Changes: 3.20" href="320.html" />
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<meta name="docsearch:language" content="en"/>
<meta name="docbuild:last-update" content="2025-04-30T13:10:40-0500 (v3.23.1)"/>
</head>
<body data-bs-spy="scroll" data-bs-target=".bd-toc-nav" data-offset="180" data-bs-root-margin="0px 0px -60%" data-default-mode="">
<a id="pst-skip-link" class="skip-link" href="#main-content">Skip to main content</a>
<div id="pst-scroll-pixel-helper"></div>
<button type="button" class="btn rounded-pill" id="pst-back-to-top">
<i class="fa-solid fa-arrow-up"></i>
Back to top
</button>
<input type="checkbox"
class="sidebar-toggle"
name="__primary"
id="__primary"/>
<label class="overlay overlay-primary" for="__primary"></label>
<input type="checkbox"
class="sidebar-toggle"
name="__secondary"
id="__secondary"/>
<label class="overlay overlay-secondary" for="__secondary"></label>
<div class="search-button__wrapper">
<div class="search-button__overlay"></div>
<div class="search-button__search-container">
<form class="bd-search d-flex align-items-center"
action="../search.html"
method="get">
<i class="fa-solid fa-magnifying-glass"></i>
<input type="search"
class="form-control"
name="q"
id="search-input"
placeholder="Search the docs ..."
aria-label="Search the docs ..."
autocomplete="off"
autocorrect="off"
autocapitalize="off"
spellcheck="false"/>
<span class="search-button__kbd-shortcut"><kbd class="kbd-shortcut__modifier">Ctrl</kbd>+<kbd>K</kbd></span>
</form></div>
</div>
<header>
<div class="bd-header navbar navbar-expand-lg bd-navbar">
<div class="bd-header__inner bd-page-width">
<label class="sidebar-toggle primary-toggle" for="__primary">
<span class="fa-solid fa-bars"></span>
</label>
<div class="col-lg-3 navbar-header-items__start">
<div class="navbar-item">
<a class="navbar-brand logo" href="../index.html">
<img src="../_static/PETSc-TAO_RGB.svg" class="logo__image only-light" alt="PETSc 3.23.1 documentation - Home"/>
<script>document.write(`<img src="../_static/PETSc-TAO_RGB_white.svg" class="logo__image only-dark" alt="PETSc 3.23.1 documentation - Home"/>`);</script>
</a></div>
</div>
<div class="col-lg-9 navbar-header-items">
<div class="me-auto navbar-header-items__center">
<div class="navbar-item">
<nav class="navbar-nav">
<ul class="bd-navbar-elements navbar-nav">
<li class="nav-item current active">
<a class="nav-link nav-internal" href="../overview/index.html">
Overview
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../install/index.html">
Install
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../tutorials/index.html">
Tutorials
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../manual/index.html">
User-Guide
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../manualpages/index.html">
C/Fortran API
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../petsc4py/index.html">
petsc4py API
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../faq/index.html">
FAQ
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../community/index.html">
Community
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../developers/index.html">
Developers
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../miscellaneous/index.html">
Misc.
</a>
</li>
</ul>
</nav></div>
</div>
<div class="navbar-header-items__end">
<div class="navbar-item navbar-persistent--container">
<script>
document.write(`
<button class="btn navbar-btn search-button-field search-button__button" title="Search" aria-label="Search" data-bs-placement="bottom" data-bs-toggle="tooltip">
<i class="fa-solid fa-magnifying-glass"></i>
<span class="search-button__default-text">Search</span>
<span class="search-button__kbd-shortcut"><kbd class="kbd-shortcut__modifier">Ctrl</kbd>+<kbd class="kbd-shortcut__modifier">K</kbd></span>
</button>
`);
</script>
</div>
<div class="navbar-item">
<script>
document.write(`
<button class="btn btn-sm navbar-btn theme-switch-button" title="light/dark" aria-label="light/dark" data-bs-placement="bottom" data-bs-toggle="tooltip">
<span class="theme-switch nav-link" data-mode="light"><i class="fa-solid fa-sun fa-lg"></i></span>
<span class="theme-switch nav-link" data-mode="dark"><i class="fa-solid fa-moon fa-lg"></i></span>
<span class="theme-switch nav-link" data-mode="auto"><i class="fa-solid fa-circle-half-stroke fa-lg"></i></span>
</button>
`);
</script></div>
<div class="navbar-item"><ul class="navbar-icon-links navbar-nav"
aria-label="Icon Links">
<li class="nav-item">
<a href="https://gitlab.com/petsc/petsc" title="GitLab" class="nav-link" rel="noopener" target="_blank" data-bs-toggle="tooltip" data-bs-placement="bottom"><span><i class="fab fa-gitlab fa-lg" aria-hidden="true"></i></span>
<span class="sr-only">GitLab</span></a>
</li>
</ul></div>
</div>
</div>
<div class="navbar-persistent--mobile">
<script>
document.write(`
<button class="btn navbar-btn search-button-field search-button__button" title="Search" aria-label="Search" data-bs-placement="bottom" data-bs-toggle="tooltip">
<i class="fa-solid fa-magnifying-glass"></i>
<span class="search-button__default-text">Search</span>
<span class="search-button__kbd-shortcut"><kbd class="kbd-shortcut__modifier">Ctrl</kbd>+<kbd class="kbd-shortcut__modifier">K</kbd></span>
</button>
`);
</script>
</div>
<label class="sidebar-toggle secondary-toggle" for="__secondary" tabindex="0">
<span class="fa-solid fa-outdent"></span>
</label>
</div>
</div>
</header>
<div class="bd-container">
<div class="bd-container__inner bd-page-width">
<div class="bd-sidebar-primary bd-sidebar">
<div class="sidebar-header-items sidebar-primary__section">
<div class="sidebar-header-items__center">
<div class="navbar-item">
<nav class="navbar-nav">
<ul class="bd-navbar-elements navbar-nav">
<li class="nav-item current active">
<a class="nav-link nav-internal" href="../overview/index.html">
Overview
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../install/index.html">
Install
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../tutorials/index.html">
Tutorials
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../manual/index.html">
User-Guide
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../manualpages/index.html">
C/Fortran API
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../petsc4py/index.html">
petsc4py API
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../faq/index.html">
FAQ
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../community/index.html">
Community
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../developers/index.html">
Developers
</a>
</li>
<li class="nav-item">
<a class="nav-link nav-internal" href="../miscellaneous/index.html">
Misc.
</a>
</li>
</ul>
</nav></div>
</div>
<div class="sidebar-header-items__end">
<div class="navbar-item">
<script>
document.write(`
<button class="btn btn-sm navbar-btn theme-switch-button" title="light/dark" aria-label="light/dark" data-bs-placement="bottom" data-bs-toggle="tooltip">
<span class="theme-switch nav-link" data-mode="light"><i class="fa-solid fa-sun fa-lg"></i></span>
<span class="theme-switch nav-link" data-mode="dark"><i class="fa-solid fa-moon fa-lg"></i></span>
<span class="theme-switch nav-link" data-mode="auto"><i class="fa-solid fa-circle-half-stroke fa-lg"></i></span>
</button>
`);
</script></div>
<div class="navbar-item"><ul class="navbar-icon-links navbar-nav"
aria-label="Icon Links">
<li class="nav-item">
<a href="https://gitlab.com/petsc/petsc" title="GitLab" class="nav-link" rel="noopener" target="_blank" data-bs-toggle="tooltip" data-bs-placement="bottom"><span><i class="fab fa-gitlab fa-lg" aria-hidden="true"></i></span>
<span class="sr-only">GitLab</span></a>
</li>
</ul></div>
</div>
</div>
<div class="sidebar-primary-items__start sidebar-primary__section">
<div class="sidebar-primary-item">
<nav class="bd-docs-nav bd-links"
aria-label="Section Navigation">
<p class="bd-links__title" role="heading" aria-level="1">Section Navigation</p>
<div class="bd-toc-item navbar-nav"><ul class="nav bd-sidenav">
<li class="toctree-l1"><a class="reference internal" href="../overview/nutshell.html">PETSc in a nutshell</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/features.html">Supported Systems</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/gpu_roadmap.html">GPU Support Roadmap</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/vector_table.html">Summary of Vector Types Available In PETSc</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/matrix_table.html">Summary of Matrix Types Available In PETSc</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/linear_solve_table.html">Summary of Sparse Linear Solvers Available In PETSc</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/nonlinear_solve_table.html">Summary of Nonlinear Solvers Available In PETSc</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/integrator_table.html">Summary of Time Integrators Available In PETSc</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/tao_solve_table.html">Summary of Tao Solvers</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/discrete_table.html">Summary of Discretization Management Systems</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/plex_transform_table.html">Summary of Unstructured Mesh Transformations</a></li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../manual/index.html">User-Guide</a><input class="toctree-checkbox" id="toctree-checkbox-1" name="toctree-checkbox-1" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-1"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manual/introduction.html">Introduction to PETSc</a><input class="toctree-checkbox" id="toctree-checkbox-2" name="toctree-checkbox-2" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-2"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manual/about_this_manual.html">About This Manual</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/getting_started.html">Getting Started</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manual/programming.html">The Solvers in PETSc/TAO</a><input class="toctree-checkbox" id="toctree-checkbox-3" name="toctree-checkbox-3" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-3"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manual/vec.html">Vectors and Parallel Data</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/mat.html">Matrices</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/ksp.html">KSP: Linear System Solvers</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/snes.html">SNES: Nonlinear Solvers</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/ts.html">TS: Scalable ODE and DAE Solvers</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/tao.html">TAO: Optimization Solvers</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manual/dm.html">DM: Interfacing Between Solvers and Models/Discretizations</a><input class="toctree-checkbox" id="toctree-checkbox-4" name="toctree-checkbox-4" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-4"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manual/dmbase.html">DM Basics</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/section.html">PetscSection: Connecting Grids to Data</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/dmplex.html">DMPlex: Unstructured Grids</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/dmstag.html">DMSTAG: Staggered, Structured Grid</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/dmnetwork.html">Networks</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/dt.html">PetscDT: Discretization Technology in PETSc</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/fe.html">PetscFE: Finite Element Infrastructure in PETSc</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manual/additional.html">Additional Information</a><input class="toctree-checkbox" id="toctree-checkbox-5" name="toctree-checkbox-5" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-5"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manual/fortran.html">PETSc for Fortran Users</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/versionchecking.html">Checking the PETSc version</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/matlab.html">Using MATLAB with PETSc</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/profiling.html">Profiling</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/performance.html">Hints for Performance Tuning</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/streams.html">STREAMS: Example Study</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/blas-lapack.html">The Use of BLAS and LAPACK in PETSc and external libraries</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/other.html">Other PETSc Features</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/advanced.html">Advanced Features of Matrices and Solvers</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/tests.html">Running PETSc Tests</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../manualpages/index.html">C/Fortran API</a><input class="toctree-checkbox" id="toctree-checkbox-6" name="toctree-checkbox-6" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-6"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manualpages/Vector.html">Vectors and Index Sets</a><input class="toctree-checkbox" id="toctree-checkbox-7" name="toctree-checkbox-7" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-7"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Vec/index.html">Vector Operations (Vec)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/IS/index.html">Index sets (IS)</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manualpages/Matrix.html">Matrices and Matrix Operations</a><input class="toctree-checkbox" id="toctree-checkbox-8" name="toctree-checkbox-8" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-8"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Mat/index.html">Matrix Operations (Mat)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/MatGraphOperations/index.html">Matrix colorings (MatColoring), orderings (MatOrdering), partitionings (MatPartitioning), and coarsening (MatCoarsen)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/MatFD/index.html">Finite difference computation of Jacobians (MatFD)</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manualpages/DataLayout.html">Data Layout and Communication</a><input class="toctree-checkbox" id="toctree-checkbox-9" name="toctree-checkbox-9" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-9"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/PetscSF/index.html">Star Forest Communication (PetscSF)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/PetscSection/index.html">Section Data Layout (PetscSection)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/AO/index.html">Application Orderings (AO)</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manualpages/DataManagement.html">Data Management between Vec and Mat, and Distributed Mesh Data Structures</a><input class="toctree-checkbox" id="toctree-checkbox-10" name="toctree-checkbox-10" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-10"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DM/index.html">Data Management (DM)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMDA/index.html">Structured Grids (DMDA)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMStag/index.html">Staggered, Structured Grids (DMSTAG)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMPlex/index.html">Unstructured Grids and Cell Complexes (DMPLEX)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMNetwork/index.html">Graphs and Networks (DMNETWORK)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMForest/index.html">A Forest of Trees and Structured Adaptive Refinement (DMFOREST)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMPatch/index.html">Sequences of parallel mesh patches (DMPATCH)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMSwarm/index.html">Particle Discretizations (DMSWARM)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMMOAB/index.html">MOAB Mesh Representation (DMMOAB)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMLabel/index.html">Selecting Parts of Meshes (DMLabel)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMPRODUCT/index.html">Tensor products of meshes (DMRODUCT)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMComposite/index.html">DMComposite</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manualpages/Discretization.html">Discretization and Function Spaces</a><input class="toctree-checkbox" id="toctree-checkbox-11" name="toctree-checkbox-11" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-11"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DT/index.html">Discretization Technology and Quadrature (DT)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/SPACE/index.html">Function Spaces (PetscSpace)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DUALSPACE/index.html">Dual Spaces (PetscDualSpace)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/FE/index.html">Finite Elements (PetscFE)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/FV/index.html">Finite Volumes (PetscFV)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/PF/index.html">Defining your own mathematical functions (PF)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/LANDAU/index.html">Landau Collision Operator</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manualpages/LinearSolvers.html">Linear Solvers and Preconditioners</a><input class="toctree-checkbox" id="toctree-checkbox-12" name="toctree-checkbox-12" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-12"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/KSP/index.html">Linear Solvers and Krylov Methods (KSP)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/PC/index.html">Preconditioners (PC)</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manualpages/NonlinearSolvers.html">Nonlinear Solvers</a><input class="toctree-checkbox" id="toctree-checkbox-13" name="toctree-checkbox-13" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-13"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/SNES/index.html">Nonlinear Solvers (SNES)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/SNESFAS/index.html">Full Approximation Scheme (FAS) nonlinear multigrid</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manualpages/Timestepping.html">Forward and Adjoint Timestepping</a><input class="toctree-checkbox" id="toctree-checkbox-14" name="toctree-checkbox-14" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-14"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/TS/index.html">Time Stepping ODE and DAE Solvers (TS)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Sensitivity/index.html">Sensitivity Analysis for ODE and DAE</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Characteristic/index.html">Semi-Lagrangian Solves using the Method of Characteristics</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manualpages/Optimization.html">Optimization</a><input class="toctree-checkbox" id="toctree-checkbox-15" name="toctree-checkbox-15" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-15"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Tao/index.html">Optimization Solvers (Tao)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/TaoLineSearch/index.html">Optimization Line Search (TaoLineSearch)</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manualpages/Visualization.html">Graphics and Visualization</a><input class="toctree-checkbox" id="toctree-checkbox-16" name="toctree-checkbox-16" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-16"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Draw/index.html">Graphics (Draw)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Viewer/index.html">Viewing Objects (Viewer)</a></li>
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../manualpages/System.html">System Routines, Profiling, Data Structures</a><input class="toctree-checkbox" id="toctree-checkbox-17" name="toctree-checkbox-17" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-17"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Sys/index.html">PETSc Options, IO, and System Utilities</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/PetscH/index.html">Hash Tables</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Log/index.html">Profiling and Logging</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Device/index.html">Device</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Matlab/index.html">Matlab</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Bag/index.html">Bag</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/BM/index.html">Benchmarks (BM)</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="index.html">Changes for each release</a></li>
<li class="toctree-l2"><a class="reference internal" href="../manualpages/singleindex.html">Single Index of all PETSc Manual Pages</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="index.html">Changes for each release</a></li>
<li class="toctree-l1"><a class="reference internal" href="../manualpages/singleindex.html">Single Index of all PETSc Manual Pages</a></li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../overview/previous_release_docs.html">Documentation for previous PETSc releases</a><input class="toctree-checkbox" id="toctree-checkbox-18" name="toctree-checkbox-18" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-18"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.22/docs"> 3.22</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.21/docs"> 3.21</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.20/docs"> 3.20</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.19/docs"> 3.19</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.18/docs"> 3.18</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.17/docs"> 3.17</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.16/docs"> 3.16</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.15/docs"> 3.15</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.14/docs"> 3.14</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.13/docs"> 3.13</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.12/docs"> 3.12</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.11/docs"> 3.11</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.10/docs"> 3.10</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.9/docs"> 3.9</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.8/docs"> 3.8</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.7/docs"> 3.7</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.6/docs"> 3.6</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.5/docs"> 3.5</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.4/docs"> 3.4</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.3/docs"> 3.3</a></li>
</ul>
</li>
</ul>
</div>
</nav></div>
</div>
<div class="sidebar-primary-items__end sidebar-primary__section">
</div>
<div id="rtd-footer-container"></div>
</div>
<main id="main-content" class="bd-main">
<div class="bd-content">
<div class="bd-article-container">
<div class="bd-header-article">
<div class="header-article-items header-article__inner">
<div class="header-article-items__start">
<div class="header-article-item">
<nav aria-label="Breadcrumb">
<ul class="bd-breadcrumbs">
<li class="breadcrumb-item breadcrumb-home">
<a href="../index.html" class="nav-link" aria-label="Home">
<i class="fa-solid fa-home"></i>
</a>
</li>
<li class="breadcrumb-item"><a href="../overview/index.html" class="nav-link">Overview</a></li>
<li class="breadcrumb-item"><i class="fa-solid fa-ellipsis"></i></li>
<li class="breadcrumb-item"><a href="index.html" class="nav-link">Changes for each release</a></li>
<li class="breadcrumb-item active" aria-current="page">Changes: 3.19</li>
</ul>
</nav>
</div>
</div>
</div>
</div>
<div id="searchbox"></div>
<article class="bd-article">
<section class="tex2jax_ignore mathjax_ignore" id="changes-3-19">
<h1>Changes: 3.19<a class="headerlink" href="#changes-3-19" title="Link to this heading">#</a></h1>
<p class="rubric">General:</p>
<ul class="simple">
<li><p>Add perfstubs package, see <a class="reference internal" href="../manual/profiling.html#sec-using-tau"><span class="std std-ref">Users Manual: Profiling: Using TAU</span></a> for more information on usage</p></li>
</ul>
<p class="rubric">Configure/Build:</p>
<ul class="simple">
<li><p>Remove unused preprocessor variables <code class="docutils notranslate"><span class="pre">PETSC_HAVE_VPRINTF_CHAR</span></code>, <code class="docutils notranslate"><span class="pre">PETSC_HAVE_VFPRINTF_CHAR</span></code>, <code class="docutils notranslate"><span class="pre">PETSC_STAT_MACROS_BROKEN</span></code>, <code class="docutils notranslate"><span class="pre">PETSC_HAVE_FORTRAN_GETARG</span></code>, <code class="docutils notranslate"><span class="pre">PETSC_uid_t</span></code>, <code class="docutils notranslate"><span class="pre">PETSC_gid_t</span></code>, <code class="docutils notranslate"><span class="pre">PETSC_HAVE_PTHREAD_BARRIER_T</span></code>, <code class="docutils notranslate"><span class="pre">PETSC_HAVE_SCHED_CPU_SET_T</span></code>, <code class="docutils notranslate"><span class="pre">PETSC_HAVE_SYS_SYSCTL_H</span></code>, <code class="docutils notranslate"><span class="pre">PETSC_HAVE_SYS_SYSINFO_H</span></code>, <code class="docutils notranslate"><span class="pre">PETSC_HAVE_SYSINFO_3ARG</span></code>, <code class="docutils notranslate"><span class="pre">PETSC_SIZEOF_SHORT</span></code>, and <code class="docutils notranslate"><span class="pre">PETSC_SIZEOF_ENUM</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">--with-gcov</span></code> configure option in favor of <code class="docutils notranslate"><span class="pre">--with-coverage</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">--with-coverage-exec</span></code> configure option to specify the coverage-collection tool to be used e.g. <code class="docutils notranslate"><span class="pre">gcov</span></code> or <code class="docutils notranslate"><span class="pre">/path/to/llvm-cov-15</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">--with-strict-petscerrorcode</span></code> configure option to enable compile-time checking for correct usage of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a></span></code>, see below</p></li>
<li><p>Add support for C++20</p></li>
<li><p>Add support for CUDA-12</p></li>
<li><p>Improved C++ dialect handling for non-conformal cases. In general <code class="docutils notranslate"><span class="pre">configure</span></code> will fail faster and with a more informative error message when the C++ compiler does not comply with restraints</p></li>
</ul>
<p class="rubric">Sys:</p>
<ul>
<li><p>Change <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscOptionsMonitorDefault.html">PetscOptionsMonitorDefault</a>()</span></code> to also take in the option source, and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscOptionsMonitorSet.html">PetscOptionsMonitorSet</a>()</span></code> to take the new monitor function</p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">PetscTable</span></code> and related functions. Previous users of <code class="docutils notranslate"><span class="pre">PetscTable</span></code> are encouraged to use the more performant <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscH/PetscHMapI.html">PetscHMapI</a></span></code> instead, though they should note that this requires additional steps and limitations:</p>
<ol class="arabic">
<li><p><code class="docutils notranslate"><span class="pre">#include</span> <span class="pre"><petscctable.h></span></code> must be swapped for <code class="docutils notranslate"><span class="pre">#include</span> <span class="pre"><petsc/private/hashmapi.h></span></code>. This of course requires that you have access to the private PETSc headers.</p></li>
<li><p>While most of the old <code class="docutils notranslate"><span class="pre">PetscTable</span></code> routines have direct analogues in <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscH/PetscHMapI.html">PetscHMapI</a></span></code>, <code class="docutils notranslate"><span class="pre">PetscAddCount()</span></code> does not. All uses of this routine should be replaced with the following snippet:</p>
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="c1">// <a href="../manualpages/PetscH/PetscHMapI.html">PetscHMapI</a> hash_table;</span>
<span class="c1">// <a href="../manualpages/Sys/PetscInt.html">PetscInt</a> key;</span>
<span class="n">PetscHashIter</span><span class="w"> </span><span class="n">it</span><span class="p">;</span>
<span class="n"><a href="../manualpages/Sys/PetscBool.html">PetscBool</a></span><span class="w"> </span><span class="n">missing</span><span class="p">;</span>
<span class="n"><a href="../manualpages/Sys/PetscCall.html">PetscCall</a></span><span class="p">(</span><span class="n"><a href="../manualpages/PetscH/PetscHMapIPut.html">PetscHMapIPut</a></span><span class="p">(</span><span class="n">hash_table</span><span class="p">,</span><span class="w"> </span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">it</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">missing</span><span class="p">));</span>
<span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">missing</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n"><a href="../manualpages/Sys/PetscInt.html">PetscInt</a></span><span class="w"> </span><span class="n">size</span><span class="p">;</span>
<span class="w"> </span><span class="n"><a href="../manualpages/Sys/PetscCall.html">PetscCall</a></span><span class="p">(</span><span class="n"><a href="../manualpages/PetscH/PetscHMapIGetSize.html">PetscHMapIGetSize</a></span><span class="p">(</span><span class="n">hash_table</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">size</span><span class="p">));</span>
<span class="w"> </span><span class="n"><a href="../manualpages/Sys/PetscCall.html">PetscCall</a></span><span class="p">(</span><span class="n"><a href="../manualpages/PetscH/PetscHMapIIterSet.html">PetscHMapIIterSet</a></span><span class="p">(</span><span class="n">hash_table</span><span class="p">,</span><span class="w"> </span><span class="n">it</span><span class="p">,</span><span class="w"> </span><span class="n">size</span><span class="p">));</span>
<span class="p">}</span>
</pre></div>
</div>
</li>
</ol>
<p>Furthermore, users should note that <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscH/PetscHMapI.html">PetscHMapI</a></span></code> is based on – and directly <code class="docutils notranslate"><span class="pre">#include</span></code> s – <code class="docutils notranslate"><span class="pre">${PETSC_DIR}/include/petsc/private/khash/khash.h</span></code>. This file contains external source code that is licensed under the MIT license, which is separate from the PETSc license.</p>
</li>
<li><p>Remove undocumented <code class="docutils notranslate"><span class="pre">PETSC_MPI_WIN_FMT</span></code> and <code class="docutils notranslate"><span class="pre">PETSC_MPI_COMM_FMT</span></code>. Users should cast both <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/MPI_Comm.html">MPI_Comm</a></span></code> and <code class="docutils notranslate"><span class="pre">MPI_Win</span></code> to <code class="docutils notranslate"><span class="pre">PETSC_INTPTR_T</span></code> and use the <code class="docutils notranslate"><span class="pre">PETSC_INTPTR_T_FMT</span></code> format specifier instead:</p>
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="n"><a href="../manualpages/Sys/MPI_Comm.html">MPI_Comm</a></span><span class="w"> </span><span class="n">comm</span><span class="p">;</span>
<span class="n">MPI_Win</span><span class="w"> </span><span class="n">win</span><span class="p">;</span>
<span class="c1">// old</span>
<span class="n"><a href="../manualpages/Sys/PetscCall.html">PetscCall</a></span><span class="p">(</span><span class="n"><a href="../manualpages/Sys/PetscPrintf.html">PetscPrintf</a></span><span class="p">(...,</span><span class="w"> </span><span class="s">"MPI Comm %"</span><span class="w"> </span><span class="n">PETSC_MPI_COMM_FMT</span><span class="p">,</span><span class="w"> </span><span class="n">comm</span><span class="p">));</span>
<span class="n"><a href="../manualpages/Sys/PetscCall.html">PetscCall</a></span><span class="p">(</span><span class="n"><a href="../manualpages/Sys/PetscPrintf.html">PetscPrintf</a></span><span class="p">(...,</span><span class="w"> </span><span class="s">"MPI Window %"</span><span class="w"> </span><span class="n">PETSC_MPI_WIN_FMT</span><span class="p">,</span><span class="w"> </span><span class="n">win</span><span class="p">));</span>
<span class="c1">// new</span>
<span class="n"><a href="../manualpages/Sys/PetscCall.html">PetscCall</a></span><span class="p">(</span><span class="n"><a href="../manualpages/Sys/PetscPrintf.html">PetscPrintf</a></span><span class="p">(...,</span><span class="w"> </span><span class="s">"MPI Comm %"</span><span class="w"> </span><span class="n">PETSC_INTPTR_T_FMT</span><span class="p">,</span><span class="w"> </span><span class="p">(</span><span class="n">PETSC_INTPTR_T</span><span class="p">)</span><span class="n">comm</span><span class="p">));</span>
<span class="n"><a href="../manualpages/Sys/PetscCall.html">PetscCall</a></span><span class="p">(</span><span class="n"><a href="../manualpages/Sys/PetscPrintf.html">PetscPrintf</a></span><span class="p">(...,</span><span class="w"> </span><span class="s">"MPI Window %"</span><span class="w"> </span><span class="n">PETSC_INTPTR_T_FMT</span><span class="p">,</span><span class="w"> </span><span class="p">(</span><span class="n">PETSC_INTPTR_T</span><span class="p">)</span><span class="n">win</span><span class="p">));</span>
</pre></div>
</div>
</li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">PETSC_NULL</span></code> in favor of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PETSC_NULLPTR.html">PETSC_NULLPTR</a></span></code> as it does the right thing in both C and C++</p></li>
<li><p>Significantly improve lookup and deletion performance of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscFunctionList.html">PetscFunctionList</a></span></code>. This also improves performance of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscObjectQueryFunction.html">PetscObjectQueryFunction</a>()</span></code>.</p></li>
<li><p>Optionally define <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a></span></code> as an <code class="docutils notranslate"><span class="pre">enum</span></code>, and tag it as <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PETSC_NODISCARD.html">PETSC_NODISCARD</a></span></code>. This feature may be enabled by configuring PETSc with <code class="docutils notranslate"><span class="pre">--with-strict-petscerrorcode</span></code> configure option. This feature allows catching the following logical errors at compile-time:</p>
<ol class="arabic simple">
<li><p>Not properly checking the return-code of PETSc calls via <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscCall.html">PetscCall</a>()</span></code>. PETSc is left in an inconsistent state when errors are detected and cannot generally recover from them, so is not supported.</p></li>
<li><p>Using the wrong <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscCall.html">PetscCall</a>()</span></code> variant, for example using <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscCall.html">PetscCall</a>()</span></code> on MPI functions (instead of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscCallMPI.html">PetscCallMPI</a>()</span></code>).</p></li>
<li><p>Returning <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a></span></code> from <code class="docutils notranslate"><span class="pre">main()</span></code> instead of <code class="docutils notranslate"><span class="pre">int</span></code>.</p></li>
</ol>
<p>Users should note that this comes with the following additional changes:</p>
<ol class="arabic">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a></span></code> to indicate success, always guaranteed to equal <code class="docutils notranslate"><span class="pre">0</span></code>.</p></li>
<li><p><code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(0)</span></code> should be changed to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>)</span></code>. While the original <code class="docutils notranslate"><span class="pre">0</span></code>-form will continue to work in C, it is required for C++.</p></li>
<li><p>Any user-defined macros using boolean short-circuiting to chain multiple calls in the same line, which logically return a <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a></span></code>, should now explicitly cast the “result” of the macro with <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a></span></code>:</p>
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="c1">// Both foo() and bar() defined as returning <a href="../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a></span>
<span class="k">extern</span><span class="w"> </span><span class="n"><a href="../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a></span><span class="w"> </span><span class="nf">foo</span><span class="p">(</span><span class="kt">int</span><span class="p">);</span>
<span class="k">extern</span><span class="w"> </span><span class="n"><a href="../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a></span><span class="w"> </span><span class="nf">bar</span><span class="p">(</span><span class="kt">int</span><span class="p">);</span>
<span class="c1">// The following macros logically "return" a <a href="../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a>, i.e. can</span>
<span class="c1">// be used:</span>
<span class="c1">//</span>
<span class="c1">// <a href="../manualpages/Sys/PetscCall.html">PetscCall</a>(MY_USER_MACRO(a, b));</span>
<span class="c1">//</span>
<span class="c1">// but use boolean short-circuiting to chain the calls together. bar()</span>
<span class="c1">// only executes if foo() returns <a href="../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a></span>
<span class="c1">// old</span>
<span class="cp">#define MY_USER_MACRO(a, b) (foo(a) || bar(b))</span>
<span class="c1">// new</span>
<span class="cp">#define MY_BETTER_USER_MACRO(a, b) ((<a href="../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a>)(foo(a) || bar(b)))</span>
</pre></div>
</div>
</li>
</ol>
<p>While currently opt-in, this feature <strong>will be enabled by default in a future release</strong>. Users are highly encourage to enable it and fix any discrepancies before that point. Note that <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a></span></code> is defined whether or not the feature is enabled, so users may incrementally update.</p>
</li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscFFlush.html">PetscFFlush</a>()</span></code></p></li>
<li><p>Soft-deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscStrcpy.html">PetscStrcpy</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscStrcat.html">PetscStrcat</a>()</span></code>. No diagnostics will be emitted if these routines are used, but users are highly encouraged to switch to the more secure (and possibly performant) <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscStrncpy.html">PetscStrncpy</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscStrlcat.html">PetscStrlcat</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PETSC_REAL_MIN.html">PETSC_REAL_MIN</a></span></code> for smallest normalized floating point number</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PETSC_ATTRIBUTE_MAY_ALIAS.html">PETSC_ATTRIBUTE_MAY_ALIAS</a></span></code> to inform compilers that a type is not subjected to type-based alias analysis</p></li>
</ul>
<p class="rubric">Event Logging:</p>
<p class="rubric">PetscViewer:</p>
<ul class="simple">
<li><p>The VTK viewers (<code class="docutils notranslate"><span class="pre">.vts</span></code>, <code class="docutils notranslate"><span class="pre">.vtr</span></code>, and <code class="docutils notranslate"><span class="pre">.vtu</span></code>) now use <code class="docutils notranslate"><span class="pre">header_type="UInt64"</span></code> to enable writing large binary appended blocks</p></li>
</ul>
<p class="rubric">PetscDraw:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Draw/PetscDrawSetVisible.html">PetscDrawSetVisible</a>()</span></code> to set if the drawing surface (the ‘window’) is visible on its display</p></li>
</ul>
<p class="rubric">AO:</p>
<p class="rubric">IS:</p>
<ul class="simple">
<li><p>Change <code class="docutils notranslate"><span class="pre"><a href="../manualpages/IS/ISDuplicate.html">ISDuplicate</a>()</span></code> to preserve the block size of the input in the output</p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">ISCompressIndicesSorted()</span></code></p></li>
</ul>
<p class="rubric">VecScatter / PetscSF:</p>
<ul class="simple">
<li><p>Add experimental support in PetscSF for MPICH MPIX_Stream (with MPICH-4.2.0 and higher). One can enable it via <code class="docutils notranslate"><span class="pre">-sf_use_stream_aware_mpi</span></code></p></li>
<li><p>Add an alias option <code class="docutils notranslate"><span class="pre">-sf_use_gpu_aware_mpi</span></code> to <code class="docutils notranslate"><span class="pre">-use_gpu_aware_mpi</span></code></p></li>
<li><p>Remove <code class="docutils notranslate"><span class="pre">SCATTER_LOCAL</span></code> from the enum type since it is not a public value</p></li>
<li><p>Change <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSF/PetscSFConcatenate.html">PetscSFConcatenate</a>()</span></code> to accept <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSF/PetscSFConcatenateRootMode.html">PetscSFConcatenateRootMode</a></span></code> parameter; add option to concatenate root spaces globally</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSF/PetscSFSetGraphFromCoordinates.html">PetscSFSetGraphFromCoordinates</a>()</span></code> to construct a graph from fuzzy matching of coordinates; such as occurs for projections between different dimensions or for overlapping meshes</p></li>
</ul>
<p class="rubric">PF:</p>
<p class="rubric">Vec:</p>
<ul class="simple">
<li><p>Document <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecOperation.html">VecOperation</a></span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecOperation.html">VECOP_SET</a></span></code></p></li>
<li><p>Significantly improve performance of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecMDot.html">VecMDot</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecMAXPY.html">VecMAXPY</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecDotNorm2.html">VecDotNorm2</a>()</span></code> for CUDA and HIP vector types. These routines should be between 2x and 4x faster.</p></li>
<li><p>Enforce the rule that <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecAssemblyBegin.html">VecAssemblyBegin</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecAssemblyEnd.html">VecAssemblyEnd</a>()</span></code> must be called on even sequential vectors after calls to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecSetValues.html">VecSetValues</a>()</span></code>. This also applies to assignment of vector entries in petsc4py</p></li>
</ul>
<p class="rubric">PetscSection:</p>
<p class="rubric">PetscPartitioner:</p>
<p class="rubric">Mat:</p>
<ul class="simple">
<li><p><code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatSetValues.html">MatSetValues</a>()</span></code> and friends will now provide reasonable performance when no preallocation information is provided</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatEliminateZeros.html">MatEliminateZeros</a>()</span></code></p></li>
<li><p>Improve efficiency of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatConvert.html">MatConvert</a>()</span></code> from <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATNORMAL.html">MATNORMAL</a></span></code> to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATHYPRE.html">MATHYPRE</a></span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatDenseGetArrayAndMemType.html">MatDenseGetArrayAndMemType</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatDenseRestoreArrayAndMemType.html">MatDenseRestoreArrayAndMemType</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatDenseGetArrayReadAndMemType.html">MatDenseGetArrayReadAndMemType</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatDenseRestoreArrayReadAndMemType.html">MatDenseRestoreArrayReadAndMemType</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatDenseGetArrayWriteAndMemType.html">MatDenseGetArrayWriteAndMemType</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatDenseRestoreArrayWriteAndMemType.html">MatDenseRestoreArrayWriteAndMemType</a>()</span></code> to return the array and memory type of a dense matrix</p></li>
<li><p>Deprecate all MatPreallocate* routines. These are no longer needed since non-preallocated matrices will now be as fast as using them</p></li>
<li><p>Significantly improve performance of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatScale.html">MatScale</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatAXPY.html">MatAXPY</a>()</span></code> for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATDENSECUDA.html">MATDENSECUDA</a></span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATDENSEHIP.html">MATDENSEHIP</a></span></code> in the case where the leading dimension is greater than the number of columns/rows. This situation arises when using e.g. sub-matrices. These routines should be between 3x and 4x faster</p></li>
</ul>
<p class="rubric">MatCoarsen:</p>
<p class="rubric">PC:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCHPDDMSetSTShareSubKSP.html">PCHPDDMSetSTShareSubKSP</a>()</span></code></p></li>
</ul>
<p class="rubric">KSP:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPMonitorDynamicToleranceCreate.html">KSPMonitorDynamicToleranceCreate</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPMonitorDynamicToleranceSetCoefficient.html">KSPMonitorDynamicToleranceSetCoefficient</a>()</span></code></p></li>
<li><p>Change <code class="docutils notranslate"><span class="pre">-sub_ksp_dynamic_tolerance_param</span></code> to <code class="docutils notranslate"><span class="pre">-sub_ksp_dynamic_tolerance</span></code></p></li>
<li><p>Add support for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATAIJCUSPARSE.html">MATAIJCUSPARSE</a></span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VECCUDA.html">VECCUDA</a></span></code> to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPHPDDM.html">KSPHPDDM</a></span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">KSP_CONVERGED_CG_NEG_CURVE</span></code> in favor of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPConvergedReason.html">KSP_CONVERGED_NEG_CURVE</a></span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">KSP_CONVERGED_CG_CONSTRAINED</span></code> in favor of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPConvergedReason.html">KSP_CONVERGED_STEP_LENGTH</a></span></code></p></li>
<li><p>Add fourth kind Chebyshev polynomials; see <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPChebyshevKind.html">KSPChebyshevKind</a></span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPChebyshevSetKind.html">KSPChebyshevSetKind</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPSetConvergedNegativeCurvature.html">KSPSetConvergedNegativeCurvature</a>()</span></code> to declare convergence if negative curvature is detected by the Krylov solver</p></li>
<li><p>Add MINRES-QLP, available via <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPMINRESSetUseQLP.html">KSPMINRESSetUseQLP</a>()</span></code> or the command line <code class="docutils notranslate"><span class="pre">-ksp_minres_qlp</span></code></p></li>
<li><p>Replace old MINRES implementation</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPMatSolveTranspose.html">KSPMatSolveTranspose</a>()</span></code></p></li>
</ul>
<p class="rubric">SNES:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESPruneJacobianColor.html">SNESPruneJacobianColor</a>()</span></code> to improve the MFFD coloring</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESVIGetVariableBounds.html">SNESVIGetVariableBounds</a>()</span></code> to access variable bounds of a <code class="docutils notranslate"><span class="pre">SNESVI</span></code></p></li>
</ul>
<p class="rubric">SNESLineSearch:</p>
<p class="rubric">TS:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/TS/TSPruneIJacobianColor.html">TSPruneIJacobianColor</a>()</span></code> to improve the MFFD coloring</p></li>
<li><p>Add argument to <code class="docutils notranslate"><span class="pre">TSMonitorSPCtxCreate()</span></code> to enable multispecies plots</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">TSMonitorHGCtxCreate()</span></code>, <code class="docutils notranslate"><span class="pre">TSMonitorHGCtxDestroy()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/TS/TSMonitorHGSwarmSolution.html">TSMonitorHGSwarmSolution</a>()</span></code> to support histogram plots of particle swarms</p></li>
<li><p>Add support for first-order adjoint calculation for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/TS/TSARKIMEX.html">TSARKIMEX</a></span></code></p></li>
</ul>
<p class="rubric">TAO:</p>
<p class="rubric">DM/DA:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMLabel/DMLabelGetType.html">DMLabelGetType</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMLabel/DMLabelSetType.html">DMLabelSetType</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMLabel/DMLabelSetUp.html">DMLabelSetUp</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMLabel/DMLabelRegister.html">DMLabelRegister</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMLabel/DMLabelRegisterAll.html">DMLabelRegisterAll</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMLabel/DMLabelRegisterDestroy.html">DMLabelRegisterDestroy</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMLabel/DMLabelEphemeralGetLabel.html">DMLabelEphemeralGetLabel</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMLabel/DMLabelEphemeralSetLabel.html">DMLabelEphemeralSetLabel</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMLabel/DMLabelEphemeralGetTransform.html">DMLabelEphemeralGetTransform</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMLabel/DMLabelEphemeralSetTransform.html">DMLabelEphemeralSetTransform</a>()</span></code></p></li>
<li><p>Now <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMGetCellDS.html">DMGetCellDS</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMGetRegionDS.html">DMGetRegionDS</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMSetRegionDS.html">DMSetRegionDS</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMGetRegionNumDS.html">DMGetRegionNumDS</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMSetRegionNumDS.html">DMSetRegionNumDS</a>()</span></code> can also set and return an input DS</p></li>
</ul>
<p class="rubric">DMSwarm:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMSwarm/DMSwarmGetMigrateType.html">DMSwarmGetMigrateType</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMSwarm/DMSwarmSetMigrateType.html">DMSwarmSetMigrateType</a>()</span></code></p></li>
</ul>
<p class="rubric">DMPlex:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexGetOrientedCone.html">DMPlexGetOrientedCone</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexRestoreOrientedCone.html">DMPlexRestoreOrientedCone</a>()</span></code> to return both cone and orientation together</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">DMPlexTransformGetChart()</span></code>, <code class="docutils notranslate"><span class="pre">DMPlexTransformGetCellType()</span></code>, <code class="docutils notranslate"><span class="pre">DMPlexTransformGetDepth()</span></code>, <code class="docutils notranslate"><span class="pre">DMPlexTransformGetDepthStratum()</span></code>, <code class="docutils notranslate"><span class="pre">DMPlexTransformGetConeSize()</span></code> to enable ephemeral meshes</p></li>
<li><p>Remove <code class="docutils notranslate"><span class="pre">DMPlexAddConeSize()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexCreateEphemeral.html">DMPlexCreateEphemeral</a>()</span></code></p></li>
<li><p>Both <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMView.html">DMView</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMLoad.html">DMLoad</a>()</span></code> now support parallel I/O with a new HDF5 format (see the manual for details)</p></li>
<li><p>Remove <code class="docutils notranslate"><span class="pre">DMPlexComputeGeometryFEM()</span></code> since it was broken</p></li>
<li><p>Change <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexMarkBoundaryFaces.html">DMPlexMarkBoundaryFaces</a>()</span></code> to avoid marking faces on the parallel boundary. To get the prior behavior, you can temporarily remove the <code class="docutils notranslate"><span class="pre">PointSF</span></code> from the <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DM.html">DM</a></span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">-dm_localize_height</span></code> to localize edges and faces</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexCreateHypercubicMesh.html">DMPlexCreateHypercubicMesh</a>()</span></code> to create hypercubic meshes needed for QCD</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">-dm_plex_shape</span> <span class="pre">zbox</span></code> option to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMSetFromOptions.html">DMSetFromOptions</a>()</span></code> to generated born-parallel meshes in Z-ordering (a space-filling curve). This may be used as-is with <code class="docutils notranslate"><span class="pre">-petscpartitioner_type</span> <span class="pre">simple</span></code> or redistributed using <code class="docutils notranslate"><span class="pre">-petscpartitioner_type</span> <span class="pre">parmetis</span></code> (or <code class="docutils notranslate"><span class="pre">ptscotch</span></code>, etc.), which is more scalable than creating a serial mesh to partition and distribute.</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexSetIsoperiodicFaceSF.html">DMPlexSetIsoperiodicFaceSF</a>()</span></code> to wrap a non-periodic mesh into periodic while preserving the local point representation for both donor and image sheet. This is supported with <code class="docutils notranslate"><span class="pre">zbox</span></code> above, and allows single-element periodicity.</p></li>
<li><p>Now <code class="docutils notranslate"><span class="pre">DMPlexGetCompressedClosure()</span></code> also takes the point orientation</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexReorderCohesiveSupports.html">DMPlexReorderCohesiveSupports</a>()</span></code></p></li>
</ul>
<p class="rubric">FE/FV:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexGetLocalOffsetsSupport.html">DMPlexGetLocalOffsetsSupport</a>()</span></code> for interaction with libCEED for FV</p></li>
<li><p>Now <code class="docutils notranslate"><span class="pre"><a href="../manualpages/FE/PetscFEIntegrateHybridResidual.html">PetscFEIntegrateHybridResidual</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/FE/PetscFEIntegrateHybridJacobian.html">PetscFEIntegrateHybridJacobian</a>()</span></code> also take the input DS</p></li>
</ul>
<p class="rubric">DMNetwork:</p>
<ul class="simple">
<li><p>Add DMNetworkGetNumVertices to retrieve the local and global number of vertices in DMNetwork</p></li>
<li><p>Add DMNetworkGetNumEdges to retrieve the local and global number of edges in DMNetwork</p></li>
<li><p>Add the ability to use <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMView.html">DMView</a>()</span></code> on a DMNetwork with a PetscViewer with format <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Viewer/PetscViewerFormat.html">PETSC_VIEWER_ASCII_CSV</a></span></code></p></li>
<li><p>Add the ability to use <code class="docutils notranslate"><span class="pre">-dmnetwork_view</span> <span class="pre">draw</span></code> and <code class="docutils notranslate"><span class="pre">-dmnetwork_view_distributed</span> <span class="pre">draw</span></code> to visualize a DMNetwork with an associated coordinate DM. This currently requires the configured Python environment to have <code class="docutils notranslate"><span class="pre">matplotlib</span></code> and <code class="docutils notranslate"><span class="pre">pandas</span></code> installed</p></li>
</ul>
<p class="rubric">DMStag:</p>
<p class="rubric">DT:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DT/PetscDTCreateDefaultQuadrature.html">PetscDTCreateDefaultQuadrature</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DT/PetscQuadratureComputePermutations.html">PetscQuadratureComputePermutations</a>()</span></code> to compute the quadrature permutation corresponding to a k-cell orientation and <code class="docutils notranslate"><span class="pre">PetscDSPermuteQuadPoint()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DT/PetscQuadratureGetCellType.html">PetscQuadratureGetCellType</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DT/PetscQuadratureSetCellType.html">PetscQuadratureSetCellType</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">PetscDSCopy()</span></code></p></li>
</ul>
<p class="rubric">Fortran:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre">MatMPIAIJGetSeqAIJF90()</span></code>, <code class="docutils notranslate"><span class="pre">MatMPIAIJRestoreSeqAIJF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/IS/ISGetIndices.html">ISGetIndices</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">ISGetIndicesF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/IS/ISRestoreIndices.html">ISRestoreIndices</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">ISRestoreIndicesF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/IS/ISLocalToGlobalMappingGetIndices.html">ISLocalToGlobalMappingGetIndices</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">ISLocalToGlobalMappingGetIndicesF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/IS/ISLocalToGlobalMappingRestoreIndices.html">ISLocalToGlobalMappingRestoreIndices</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">ISLocalToGlobalMappingRestoreIndicesF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecGetArray.html">VecGetArray</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">VecGetArrayF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecRestoreArray.html">VecRestoreArray</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">VecRestoreArrayF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecGetArrayRead.html">VecGetArrayRead</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">VecGetArrayReadF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecRestoreArrayRead.html">VecRestoreArrayRead</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">VecRestoreArrayReadF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecDuplicateVecs.html">VecDuplicateVecs</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">VecDuplicateVecsF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecDestroyVecs.html">VecDestroyVecs</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">VecDestroyVecsF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMDA/DMDAVecGetArray.html">DMDAVecGetArray</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">DMDAVecGetArrayF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMDA/DMDAVecRestoreArray.html">DMDAVecRestoreArray</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">DMDAVecRestoreArrayF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMDA/DMDAVecGetArrayRead.html">DMDAVecGetArrayRead</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">DMDAVecGetArrayReadF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMDA/DMDAVecRestoreArrayRead.html">DMDAVecRestoreArrayRead</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">DMDAVecRestoreArrayReadF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMDA/DMDAVecGetArrayWrite.html">DMDAVecGetArrayWrite</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">DMDAVecGetArrayWriteF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMDA/DMDAVecRestoreArrayWrite.html">DMDAVecRestoreArrayWrite</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">DMDAVecRestoreArrayWriteF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatGetRowIJ.html">MatGetRowIJ</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">MatGetRowIJF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatRestoreRowIJ.html">MatRestoreRowIJ</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">MatRestoreRowIJF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatSeqAIJGetArray.html">MatSeqAIJGetArray</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">MatSeqAIJGetArrayF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatSeqAIJRestoreArray.html">MatSeqAIJRestoreArray</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">MatSeqAIJRestoreArrayF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatMPIAIJGetSeqAIJ.html">MatMPIAIJGetSeqAIJ</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">MatMPIAIJGetSeqAIJF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatDenseGetArray.html">MatDenseGetArray</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">MatDenseGetArrayF90()</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatDenseRestoreArray.html">MatDenseRestoreArray</a>()</span></code> in favor of <code class="docutils notranslate"><span class="pre">MatDenseRestoreArrayF90()</span></code></p></li>
</ul>
</section>
</article>
<footer class="prev-next-footer">
<div class="prev-next-area">
<a class="left-prev"
href="320.html"
title="previous page">
<i class="fa-solid fa-angle-left"></i>
<div class="prev-next-info">
<p class="prev-next-subtitle">previous</p>
<p class="prev-next-title">Changes: 3.20</p>
</div>
</a>
<a class="right-next"
href="318.html"
title="next page">
<div class="prev-next-info">
<p class="prev-next-subtitle">next</p>
<p class="prev-next-title">Changes: 3.18</p>
</div>
<i class="fa-solid fa-angle-right"></i>
</a>
</div>
</footer>
</div>
<div class="bd-sidebar-secondary bd-toc"><div class="sidebar-secondary-items sidebar-secondary__inner">
<div class="sidebar-secondary-item">
<div class="tocsection editthispage">
<a href="https://gitlab.com/petsc/petsc/-/edit/release/doc/changes/319.md">
<i class="fa-solid fa-pencil"></i>
Edit on GitLab
</a>
</div>
</div>
<div class="sidebar-secondary-item">
<div class="tocsection sourcelink">
<a href="../_sources/changes/319.md.txt">
<i class="fa-solid fa-file-lines"></i> Show Source
</a>
</div>
</div>
</div></div>
</div>
<footer class="bd-footer-content">
</footer>
</main>
</div>
</div>
<!-- Scripts loaded after <body> so the DOM is not blocked -->
<script src="../_static/scripts/bootstrap.js?digest=bd9e20870c6007c4c509"></script>
<script src="../_static/scripts/pydata-sphinx-theme.js?digest=bd9e20870c6007c4c509"></script>
<footer class="bd-footer">
<div class="bd-footer__inner bd-page-width">
<div class="footer-items__start">
<div class="footer-item">
<p class="copyright">
© Copyright 1991-2025, UChicago Argonne, LLC and the PETSc Development Team.
<br/>
</p>
</div>
<div class="footer-item">
<p class="sphinx-version">
Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> 7.3.7.
<br/>
</p>
</div>
</div>
<div class="footer-items__end">
<div class="footer-item">
<p class="theme-version">
Built with the <a href="https://pydata-sphinx-theme.readthedocs.io/en/stable/index.html">PyData Sphinx Theme</a> 0.15.1.
</p></div>
<div class="footer-item"><p class="last-updated">
Last updated on 2025-04-30T13:10:40-0500 (v3.23.1).
<br/>
</p></div>
</div>
</div>
</footer>
</body>
</html>
|
