-
Notifications
You must be signed in to change notification settings - Fork 2
/
Copy pathmemory.html
1534 lines (1190 loc) · 126 KB
/
memory.html
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
<!DOCTYPE html>
<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
<head>
<meta name="robots" content="noindex">
<meta name="robots" content="noindex">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>torch.cuda.memory — PyTorch 2.0 documentation</title>
<link rel="canonical" href="https://pytorch.org/docs/stable/_modules/torch/cuda/memory.html"/>
<link rel="stylesheet" href="../../../_static/css/theme.css" type="text/css" />
<!-- <link rel="stylesheet" href="../../../_static/pygments.css" type="text/css" /> -->
<link rel="stylesheet" href="../../../_static/pygments.css" type="text/css" />
<link rel="stylesheet" href="../../../_static/css/theme.css" type="text/css" />
<link rel="stylesheet" href="../../../_static/copybutton.css" type="text/css" />
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.10.0-beta/dist/katex.min.css" type="text/css" />
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.13.11/dist/katex.min.css" type="text/css" />
<link rel="stylesheet" href="../../../_static/katex-math.css" type="text/css" />
<link rel="stylesheet" href="../../../_static/sphinx-dropdown.css" type="text/css" />
<link rel="stylesheet" href="../../../_static/panels-bootstrap.min.css" type="text/css" />
<link rel="stylesheet" href="../../../_static/css/jit.css" type="text/css" />
<link rel="index" title="Index" href="../../../genindex.html" />
<link rel="search" title="Search" href="../../../search.html" />
<!-- Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-117752657-2"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'UA-117752657-2');
</script>
<!-- End Google Analytics -->
<script src="../../../_static/js/modernizr.min.js"></script>
<!-- Preload the theme fonts -->
<link rel="preload" href="../../../_static/fonts/FreightSans/freight-sans-book.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="../../../_static/fonts/FreightSans/freight-sans-medium.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="../../../_static/fonts/IBMPlexMono/IBMPlexMono-Medium.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="../../../_static/fonts/FreightSans/freight-sans-bold.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="../../../_static/fonts/FreightSans/freight-sans-medium-italic.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="../../../_static/fonts/IBMPlexMono/IBMPlexMono-SemiBold.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<!-- Preload the katex fonts -->
<link rel="preload" href="https://cdn.jsdelivr.net/npm/katex@0.10.0/dist/fonts/KaTeX_Math-Italic.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="https://cdn.jsdelivr.net/npm/katex@0.10.0/dist/fonts/KaTeX_Main-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="https://cdn.jsdelivr.net/npm/katex@0.10.0/dist/fonts/KaTeX_Main-Bold.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="https://cdn.jsdelivr.net/npm/katex@0.10.0/dist/fonts/KaTeX_Size1-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="https://cdn.jsdelivr.net/npm/katex@0.10.0/dist/fonts/KaTeX_Size4-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="https://cdn.jsdelivr.net/npm/katex@0.10.0/dist/fonts/KaTeX_Size2-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="https://cdn.jsdelivr.net/npm/katex@0.10.0/dist/fonts/KaTeX_Size3-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="https://cdn.jsdelivr.net/npm/katex@0.10.0/dist/fonts/KaTeX_Caligraphic-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.15.2/css/all.css" integrity="sha384-vSIIfh2YWi9wW0r9iZe7RJPrKwp6bG+s9QZMoITbCckVJqGCCRhc+ccxNcdpHuYu" crossorigin="anonymous">
</head>
<div class="container-fluid header-holder tutorials-header" id="header-holder">
<div class="container">
<div class="header-container">
<a class="header-logo" href="https://pytorch.org/" aria-label="PyTorch"></a>
<div class="main-menu">
<ul>
<li>
<a href="https://pytorch.org/get-started">Get Started</a>
</li>
<li>
<a href="https://pytorch.org/ecosystem">Ecosystem</a>
</li>
<li>
<a href="https://pytorch.org/mobile">Mobile</a>
</li>
<li>
<a href="https://pytorch.org/blog/">Blog</a>
</li>
<li>
<a href="https://pytorch.org/tutorials">Tutorials</a>
</li>
<li class="active docs-active">
<div id="resourcesDropdownButton" data-toggle="resources-dropdown" class="resources-dropdown">
<a class="resource-option with-down-orange-arrow">
Docs
</a>
<div class="resources-dropdown-menu">
<a class="doc-dropdown-option nav-dropdown-item" href="https://pytorch.org/docs/stable/index.html">
<span class="dropdown-title">PyTorch</span>
<p></p>
</a>
<a class="doc-dropdown-option nav-dropdown-item" href="https://pytorch.org/audio/stable/index.html">
<span class="dropdown-title">torchaudio</span>
<p></p>
</a>
<a class="doc-dropdown-option nav-dropdown-item" href="https://pytorch.org/text/stable/index.html">
<span class="dropdown-title">torchtext</span>
<p></p>
</a>
<a class="doc-dropdown-option nav-dropdown-item" href="https://pytorch.org/vision/stable/index.html">
<span class="dropdown-title">torchvision</span>
<p></p>
</a>
<a class="doc-dropdown-option nav-dropdown-item" href="https://pytorch.org/torcharrow">
<span class="dropdown-title">torcharrow</span>
<p></p>
</a>
<a class="doc-dropdown-option nav-dropdown-item" href="https://pytorch.org/data">
<span class="dropdown-title">TorchData</span>
<p></p>
</a>
<a class="doc-dropdown-option nav-dropdown-item" href="https://pytorch.org/torchrec">
<span class="dropdown-title">TorchRec</span>
<p></p>
</a>
<a class="doc-dropdown-option nav-dropdown-item" href="https://pytorch.org/serve/">
<span class="dropdown-title">TorchServe</span>
<p></p>
</a>
<a class="doc-dropdown-option nav-dropdown-item" href="https://pytorch.org/torchx/">
<span class="dropdown-title">TorchX</span>
<p></p>
</a>
<a class="doc-dropdown-option nav-dropdown-item" href="https://pytorch.org/xla">
<span class="dropdown-title">PyTorch on XLA Devices</span>
<p></p>
</a>
</div>
</li>
<li>
<div id="resourcesDropdownButton" data-toggle="resources-dropdown" class="resources-dropdown">
<a class="resource-option with-down-arrow">
Resources
</a>
<div class="resources-dropdown-menu">
<a class="nav-dropdown-item" href="https://pytorch.org/features">
<span class="dropdown-title">About</span>
<p>Learn about PyTorch’s features and capabilities</p>
</a>
<a class="nav-dropdown-item" href="https://pytorch.org/foundation">
<span class="dropdown-title">PyTorch Foundation</span>
<p>Learn about the PyTorch foundation</p>
</a>
<a class="nav-dropdown-item" href="https://pytorch.org/#community-module">
<span class="dropdown-title">Community</span>
<p>Join the PyTorch developer community to contribute, learn, and get your questions answered.</p>
</a>
<a class="nav-dropdown-item" href="https://pytorch.org/community-stories">
<span class="dropdown-title">Community Stories</span>
<p>Learn how our community solves real, everyday machine learning problems with PyTorch.</p>
</a>
<a class="nav-dropdown-item" href="https://pytorch.org/resources">
<span class="dropdown-title">Developer Resources</span>
<p>Find resources and get questions answered</p>
</a>
<a class="nav-dropdown-item" href="https://pytorch.org/events">
<span class="dropdown-title">Events</span>
<p>Find events, webinars, and podcasts</p>
</a>
<a class="nav-dropdown-item" href="https://discuss.pytorch.org/" target="_blank">
<span class="dropdown-title">Forums</span>
<p>A place to discuss PyTorch code, issues, install, research</p>
</a>
<a class="nav-dropdown-item" href="https://pytorch.org/hub">
<span class="dropdown-title">Models (Beta)</span>
<p>Discover, publish, and reuse pre-trained models</p>
</a>
</div>
</div>
</li>
<li>
<a href="https://github.com/pytorch/pytorch">GitHub</a>
</li>
</ul>
</div>
<a class="main-menu-open-button" href="#" data-behavior="open-mobile-menu"></a>
</div>
</div>
</div>
<body class="pytorch-body">
<div class="table-of-contents-link-wrapper">
<span>Table of Contents</span>
<a href="#" class="toggle-table-of-contents" data-behavior="toggle-table-of-contents"></a>
</div>
<nav data-toggle="wy-nav-shift" class="pytorch-left-menu" id="pytorch-left-menu">
<div class="pytorch-side-scroll">
<div class="pytorch-menu pytorch-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
<div class="pytorch-left-menu-search">
<div class="version">
<a href='https://pytorch.org/docs/versions.html'>2.0 ▼</a>
</div>
<div role="search">
<form id="rtd-search-form" class="wy-form" action="../../../search.html" method="get">
<input type="text" name="q" placeholder="Search Docs" />
<input type="hidden" name="check_keywords" value="yes" />
<input type="hidden" name="area" value="default" />
</form>
</div>
</div>
<p class="caption" role="heading"><span class="caption-text">Community</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../../community/build_ci_governance.html">PyTorch Governance | Build + CI</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../community/contribution_guide.html">PyTorch Contribution Guide</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../community/design.html">PyTorch Design Philosophy</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../community/governance.html">PyTorch Governance | Mechanics</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../community/persons_of_interest.html">PyTorch Governance | Maintainers</a></li>
</ul>
<p class="caption" role="heading"><span class="caption-text">Developer Notes</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/amp_examples.html">CUDA Automatic Mixed Precision examples</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/autograd.html">Autograd mechanics</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/broadcasting.html">Broadcasting semantics</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/cpu_threading_torchscript_inference.html">CPU threading and TorchScript inference</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/cuda.html">CUDA semantics</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/ddp.html">Distributed Data Parallel</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/extending.html">Extending PyTorch</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/extending.func.html">Extending torch.func with autograd.Function</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/faq.html">Frequently Asked Questions</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/gradcheck.html">Gradcheck mechanics</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/hip.html">HIP (ROCm) semantics</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/large_scale_deployments.html">Features for large-scale deployments</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/modules.html">Modules</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/mps.html">MPS backend</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/multiprocessing.html">Multiprocessing best practices</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/numerical_accuracy.html">Numerical accuracy</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/randomness.html">Reproducibility</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/serialization.html">Serialization semantics</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../notes/windows.html">Windows FAQ</a></li>
</ul>
<p class="caption" role="heading"><span class="caption-text">torch.compile</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../../dynamo/index.html">TorchDynamo Overview</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../dynamo/installation.html">Installing TorchDynamo</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../dynamo/get-started.html">Getting Started</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../dynamo/guards-overview.html">Guards Overview</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../dynamo/custom-backends.html">Custom Backends</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../dynamo/deep-dive.html">TorchDynamo Deeper Dive</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../dynamo/troubleshooting.html">TorchDynamo Troubleshooting</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../dynamo/faq.html">Frequently Asked Questions</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../ir.html">IRs</a></li>
</ul>
<p class="caption" role="heading"><span class="caption-text">Language Bindings</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../../cpp_index.html">C++</a></li>
<li class="toctree-l1"><a class="reference external" href="https://pytorch.org/javadoc/">Javadoc</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../deploy.html">torch::deploy</a></li>
</ul>
<p class="caption" role="heading"><span class="caption-text">Python API</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../../torch.html">torch</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../nn.html">torch.nn</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../nn.functional.html">torch.nn.functional</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../tensors.html">torch.Tensor</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../tensor_attributes.html">Tensor Attributes</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../tensor_view.html">Tensor Views</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../amp.html">torch.amp</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../autograd.html">torch.autograd</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../library.html">torch.library</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../cuda.html">torch.cuda</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../mps.html">torch.mps</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../backends.html">torch.backends</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../distributed.html">torch.distributed</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../distributed.algorithms.join.html">torch.distributed.algorithms.join</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../distributed.elastic.html">torch.distributed.elastic</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../fsdp.html">torch.distributed.fsdp</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../distributed.optim.html">torch.distributed.optim</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../distributed.tensor.parallel.html">torch.distributed.tensor.parallel</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../distributed.checkpoint.html">torch.distributed.checkpoint</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../distributions.html">torch.distributions</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../_dynamo.html">torch._dynamo</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../fft.html">torch.fft</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../func.html">torch.func</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../futures.html">torch.futures</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../fx.html">torch.fx</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../hub.html">torch.hub</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../jit.html">torch.jit</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../linalg.html">torch.linalg</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../monitor.html">torch.monitor</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../signal.html">torch.signal</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../special.html">torch.special</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../torch.overrides.html">torch.overrides</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../package.html">torch.package</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../profiler.html">torch.profiler</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../nn.init.html">torch.nn.init</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../onnx.html">torch.onnx</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../onnx_diagnostics.html">torch.onnx diagnostics</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../optim.html">torch.optim</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../complex_numbers.html">Complex Numbers</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../ddp_comm_hooks.html">DDP Communication Hooks</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../pipeline.html">Pipeline Parallelism</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../quantization.html">Quantization</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../rpc.html">Distributed RPC Framework</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../random.html">torch.random</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../masked.html">torch.masked</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../nested.html">torch.nested</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../sparse.html">torch.sparse</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../storage.html">torch.Storage</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../testing.html">torch.testing</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../benchmark_utils.html">torch.utils.benchmark</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../bottleneck.html">torch.utils.bottleneck</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../checkpoint.html">torch.utils.checkpoint</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../cpp_extension.html">torch.utils.cpp_extension</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../data.html">torch.utils.data</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../jit_utils.html">torch.utils.jit</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../dlpack.html">torch.utils.dlpack</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../mobile_optimizer.html">torch.utils.mobile_optimizer</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../model_zoo.html">torch.utils.model_zoo</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../tensorboard.html">torch.utils.tensorboard</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../type_info.html">Type Info</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../named_tensor.html">Named Tensors</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../name_inference.html">Named Tensors operator coverage</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../config_mod.html">torch.__config__</a></li>
</ul>
<p class="caption" role="heading"><span class="caption-text">Libraries</span></p>
<ul>
<li class="toctree-l1"><a class="reference external" href="https://pytorch.org/audio/stable">torchaudio</a></li>
<li class="toctree-l1"><a class="reference external" href="https://pytorch.org/data">TorchData</a></li>
<li class="toctree-l1"><a class="reference external" href="https://pytorch.org/torchrec">TorchRec</a></li>
<li class="toctree-l1"><a class="reference external" href="https://pytorch.org/serve">TorchServe</a></li>
<li class="toctree-l1"><a class="reference external" href="https://pytorch.org/text/stable">torchtext</a></li>
<li class="toctree-l1"><a class="reference external" href="https://pytorch.org/vision/stable">torchvision</a></li>
<li class="toctree-l1"><a class="reference external" href="https://pytorch.org/xla/">PyTorch on XLA Devices</a></li>
</ul>
</div>
</div>
</nav>
<div class="pytorch-container">
<div class="pytorch-page-level-bar" id="pytorch-page-level-bar">
<div class="pytorch-breadcrumbs-wrapper">
<div role="navigation" aria-label="breadcrumbs navigation">
<ul class="pytorch-breadcrumbs">
<li>
<a href="../../../index.html">
Docs
</a> >
</li>
<li><a href="../../index.html">Module code</a> ></li>
<li><a href="../../torch.html">torch</a> ></li>
<li><a href="../cuda.html">torch.cuda</a> ></li>
<li>torch.cuda.memory</li>
<li class="pytorch-breadcrumbs-aside">
</li>
</ul>
</div>
</div>
<div class="pytorch-shortcuts-wrapper" id="pytorch-shortcuts-wrapper">
Shortcuts
</div>
</div>
<section data-toggle="wy-nav-shift" id="pytorch-content-wrap" class="pytorch-content-wrap">
<div class="pytorch-content-left">
<div class="rst-content">
<div role="main" class="main-content" itemscope="itemscope" itemtype="http://schema.org/Article">
<article itemprop="articleBody" id="pytorch-article" class="pytorch-article">
<h1>Source code for torch.cuda.memory</h1><div class="highlight"><pre>
<span></span><span class="kn">import</span> <span class="nn">collections</span>
<span class="kn">import</span> <span class="nn">contextlib</span>
<span class="kn">import</span> <span class="nn">ctypes</span>
<span class="kn">import</span> <span class="nn">warnings</span>
<span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Any</span><span class="p">,</span> <span class="n">Dict</span><span class="p">,</span> <span class="n">Union</span><span class="p">,</span> <span class="n">Tuple</span>
<span class="kn">import</span> <span class="nn">torch</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">is_initialized</span><span class="p">,</span> <span class="n">_get_device_index</span><span class="p">,</span> <span class="n">_lazy_init</span>
<span class="kn">from</span> <span class="nn">._utils</span> <span class="kn">import</span> <span class="n">_dummy_type</span>
<span class="kn">from</span> <span class="nn">._memory_viz</span> <span class="kn">import</span> <span class="n">segments</span> <span class="k">as</span> <span class="n">_segments</span><span class="p">,</span> <span class="n">memory</span> <span class="k">as</span> <span class="n">_memory</span>
<span class="kn">from</span> <span class="nn">torch.types</span> <span class="kn">import</span> <span class="n">Device</span>
<span class="kn">from</span> <span class="nn">torch</span> <span class="kn">import</span> <span class="n">_C</span>
<span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"caching_allocator_alloc"</span><span class="p">,</span> <span class="s2">"caching_allocator_delete"</span><span class="p">,</span> <span class="s2">"set_per_process_memory_fraction"</span><span class="p">,</span>
<span class="s2">"empty_cache"</span><span class="p">,</span> <span class="s2">"memory_stats"</span><span class="p">,</span> <span class="s2">"memory_stats_as_nested_dict"</span><span class="p">,</span> <span class="s2">"reset_accumulated_memory_stats"</span><span class="p">,</span>
<span class="s2">"reset_peak_memory_stats"</span><span class="p">,</span> <span class="s2">"reset_max_memory_allocated"</span><span class="p">,</span> <span class="s2">"reset_max_memory_cached"</span><span class="p">,</span>
<span class="s2">"memory_allocated"</span><span class="p">,</span> <span class="s2">"max_memory_allocated"</span><span class="p">,</span> <span class="s2">"memory_reserved"</span><span class="p">,</span> <span class="s2">"max_memory_reserved"</span><span class="p">,</span>
<span class="s2">"memory_cached"</span><span class="p">,</span> <span class="s2">"max_memory_cached"</span><span class="p">,</span> <span class="s2">"memory_snapshot"</span><span class="p">,</span> <span class="s2">"memory_summary"</span><span class="p">,</span> <span class="s2">"list_gpu_processes"</span><span class="p">,</span>
<span class="s2">"mem_get_info"</span><span class="p">,</span> <span class="s2">"get_allocator_backend"</span><span class="p">,</span> <span class="s2">"CUDAPluggableAllocator"</span><span class="p">,</span> <span class="s2">"change_current_allocator"</span><span class="p">]</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="p">,</span> <span class="s1">'_cuda_CUDAAllocator'</span><span class="p">):</span>
<span class="c1"># Define dummy base classes</span>
<span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="o">.</span><span class="vm">__dict__</span><span class="p">[</span><span class="s1">'_cuda_CUDAAllocator'</span><span class="p">]</span> <span class="o">=</span> <span class="n">_dummy_type</span><span class="p">(</span><span class="s1">'_cuda_CUDAAllocator'</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_host_allocator</span><span class="p">():</span>
<span class="n">_lazy_init</span><span class="p">()</span>
<span class="k">return</span> <span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="o">.</span><span class="n">_cuda_cudaHostAllocator</span><span class="p">()</span>
<span class="nd">@contextlib</span><span class="o">.</span><span class="n">contextmanager</span>
<span class="k">def</span> <span class="nf">_free_mutex</span><span class="p">():</span>
<span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="o">.</span><span class="n">_cuda_lock_mutex</span><span class="p">()</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">yield</span>
<span class="k">finally</span><span class="p">:</span>
<span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="o">.</span><span class="n">_cuda_unlock_mutex</span><span class="p">()</span>
<div class="viewcode-block" id="caching_allocator_alloc"><a class="viewcode-back" href="../../../generated/torch.cuda.caching_allocator_alloc.html#torch.cuda.caching_allocator_alloc">[docs]</a><span class="k">def</span> <span class="nf">caching_allocator_alloc</span><span class="p">(</span><span class="n">size</span><span class="p">,</span> <span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">stream</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sa">r</span><span class="sd">"""Performs a memory allocation using the CUDA memory allocator.</span>
<span class="sd"> Memory is allocated for a given device and a stream, this</span>
<span class="sd"> function is intended to be used for interoperability with other</span>
<span class="sd"> frameworks. Allocated memory is released through</span>
<span class="sd"> :func:`~torch.cuda.caching_allocator_delete`.</span>
<span class="sd"> Args:</span>
<span class="sd"> size (int): number of bytes to be allocated.</span>
<span class="sd"> device (torch.device or int, optional): selected device. If it is</span>
<span class="sd"> ``None`` the default CUDA device is used.</span>
<span class="sd"> stream (torch.cuda.Stream or int, optional): selected stream. If is ``None`` then</span>
<span class="sd"> the default stream for the selected device is used.</span>
<span class="sd"> .. note::</span>
<span class="sd"> See :ref:`cuda-memory-management` for more details about GPU memory</span>
<span class="sd"> management.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">device</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">device</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">cuda</span><span class="o">.</span><span class="n">current_device</span><span class="p">()</span>
<span class="n">device</span> <span class="o">=</span> <span class="n">_get_device_index</span><span class="p">(</span><span class="n">device</span><span class="p">)</span>
<span class="k">if</span> <span class="n">stream</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">stream</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">cuda</span><span class="o">.</span><span class="n">current_stream</span><span class="p">(</span><span class="n">device</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">stream</span><span class="p">,</span> <span class="n">torch</span><span class="o">.</span><span class="n">cuda</span><span class="o">.</span><span class="n">streams</span><span class="o">.</span><span class="n">Stream</span><span class="p">):</span>
<span class="n">stream</span> <span class="o">=</span> <span class="n">stream</span><span class="o">.</span><span class="n">cuda_stream</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">stream</span><span class="p">,</span> <span class="nb">int</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'Invalid type for stream argument, must be '</span>
<span class="s1">'`torch.cuda.Stream` or `int` representing a pointer '</span>
<span class="s1">'to a existing stream'</span><span class="p">)</span>
<span class="k">with</span> <span class="n">torch</span><span class="o">.</span><span class="n">cuda</span><span class="o">.</span><span class="n">device</span><span class="p">(</span><span class="n">device</span><span class="p">):</span>
<span class="k">return</span> <span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="o">.</span><span class="n">_cuda_cudaCachingAllocator_raw_alloc</span><span class="p">(</span><span class="n">size</span><span class="p">,</span> <span class="n">stream</span><span class="p">)</span></div>
<div class="viewcode-block" id="caching_allocator_delete"><a class="viewcode-back" href="../../../generated/torch.cuda.caching_allocator_delete.html#torch.cuda.caching_allocator_delete">[docs]</a><span class="k">def</span> <span class="nf">caching_allocator_delete</span><span class="p">(</span><span class="n">mem_ptr</span><span class="p">):</span>
<span class="sa">r</span><span class="sd">"""Deletes memory allocated using the CUDA memory allocator.</span>
<span class="sd"> Memory allocated with :func:`~torch.cuda.caching_allocator_alloc`.</span>
<span class="sd"> is freed here. The associated device and stream are tracked inside</span>
<span class="sd"> the allocator.</span>
<span class="sd"> Args:</span>
<span class="sd"> mem_ptr (int): memory address to be freed by the allocator.</span>
<span class="sd"> .. note::</span>
<span class="sd"> See :ref:`cuda-memory-management` for more details about GPU memory</span>
<span class="sd"> management.</span>
<span class="sd"> """</span>
<span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="o">.</span><span class="n">_cuda_cudaCachingAllocator_raw_delete</span><span class="p">(</span><span class="n">mem_ptr</span><span class="p">)</span></div>
<div class="viewcode-block" id="set_per_process_memory_fraction"><a class="viewcode-back" href="../../../generated/torch.cuda.set_per_process_memory_fraction.html#torch.cuda.set_per_process_memory_fraction">[docs]</a><span class="k">def</span> <span class="nf">set_per_process_memory_fraction</span><span class="p">(</span><span class="n">fraction</span><span class="p">,</span> <span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Set memory fraction for a process.</span>
<span class="sd"> The fraction is used to limit an caching allocator to allocated memory on a CUDA device.</span>
<span class="sd"> The allowed value equals the total visible memory multiplied fraction.</span>
<span class="sd"> If trying to allocate more than the allowed value in a process, will raise an out of</span>
<span class="sd"> memory error in allocator.</span>
<span class="sd"> Args:</span>
<span class="sd"> fraction(float): Range: 0~1. Allowed memory equals total_memory * fraction.</span>
<span class="sd"> device (torch.device or int, optional): selected device. If it is</span>
<span class="sd"> ``None`` the default CUDA device is used.</span>
<span class="sd"> .. note::</span>
<span class="sd"> In general, the total available free memory is less than the total capacity.</span>
<span class="sd"> """</span>
<span class="n">_lazy_init</span><span class="p">()</span>
<span class="k">if</span> <span class="n">device</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">device</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">cuda</span><span class="o">.</span><span class="n">current_device</span><span class="p">()</span>
<span class="n">device</span> <span class="o">=</span> <span class="n">_get_device_index</span><span class="p">(</span><span class="n">device</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">fraction</span><span class="p">,</span> <span class="nb">float</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'Invalid type for fraction argument, must be `float`'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">fraction</span> <span class="o"><</span> <span class="mi">0</span> <span class="ow">or</span> <span class="n">fraction</span> <span class="o">></span> <span class="mi">1</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Invalid fraction value: </span><span class="si">{}</span><span class="s1">. '</span>
<span class="s1">'Allowed range: 0~1'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">fraction</span><span class="p">))</span>
<span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="o">.</span><span class="n">_cuda_setMemoryFraction</span><span class="p">(</span><span class="n">fraction</span><span class="p">,</span> <span class="n">device</span><span class="p">)</span></div>
<div class="viewcode-block" id="empty_cache"><a class="viewcode-back" href="../../../generated/torch.cuda.empty_cache.html#torch.cuda.empty_cache">[docs]</a><span class="k">def</span> <span class="nf">empty_cache</span><span class="p">()</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Releases all unoccupied cached memory currently held by the caching</span>
<span class="sd"> allocator so that those can be used in other GPU application and visible in</span>
<span class="sd"> `nvidia-smi`.</span>
<span class="sd"> .. note::</span>
<span class="sd"> :func:`~torch.cuda.empty_cache` doesn't increase the amount of GPU</span>
<span class="sd"> memory available for PyTorch. However, it may help reduce fragmentation</span>
<span class="sd"> of GPU memory in certain cases. See :ref:`cuda-memory-management` for</span>
<span class="sd"> more details about GPU memory management.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">is_initialized</span><span class="p">():</span>
<span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="o">.</span><span class="n">_cuda_emptyCache</span><span class="p">()</span></div>
<div class="viewcode-block" id="memory_stats"><a class="viewcode-back" href="../../../generated/torch.cuda.memory_stats.html#torch.cuda.memory_stats">[docs]</a><span class="k">def</span> <span class="nf">memory_stats</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]:</span>
<span class="sa">r</span><span class="sd">"""Returns a dictionary of CUDA memory allocator statistics for a</span>
<span class="sd"> given device.</span>
<span class="sd"> The return value of this function is a dictionary of statistics, each of</span>
<span class="sd"> which is a non-negative integer.</span>
<span class="sd"> Core statistics:</span>
<span class="sd"> - ``"allocated.{all,large_pool,small_pool}.{current,peak,allocated,freed}"``:</span>
<span class="sd"> number of allocation requests received by the memory allocator.</span>
<span class="sd"> - ``"allocated_bytes.{all,large_pool,small_pool}.{current,peak,allocated,freed}"``:</span>
<span class="sd"> amount of allocated memory.</span>
<span class="sd"> - ``"segment.{all,large_pool,small_pool}.{current,peak,allocated,freed}"``:</span>
<span class="sd"> number of reserved segments from ``cudaMalloc()``.</span>
<span class="sd"> - ``"reserved_bytes.{all,large_pool,small_pool}.{current,peak,allocated,freed}"``:</span>
<span class="sd"> amount of reserved memory.</span>
<span class="sd"> - ``"active.{all,large_pool,small_pool}.{current,peak,allocated,freed}"``:</span>
<span class="sd"> number of active memory blocks.</span>
<span class="sd"> - ``"active_bytes.{all,large_pool,small_pool}.{current,peak,allocated,freed}"``:</span>
<span class="sd"> amount of active memory.</span>
<span class="sd"> - ``"inactive_split.{all,large_pool,small_pool}.{current,peak,allocated,freed}"``:</span>
<span class="sd"> number of inactive, non-releasable memory blocks.</span>
<span class="sd"> - ``"inactive_split_bytes.{all,large_pool,small_pool}.{current,peak,allocated,freed}"``:</span>
<span class="sd"> amount of inactive, non-releasable memory.</span>
<span class="sd"> For these core statistics, values are broken down as follows.</span>
<span class="sd"> Pool type:</span>
<span class="sd"> - ``all``: combined statistics across all memory pools.</span>
<span class="sd"> - ``large_pool``: statistics for the large allocation pool</span>
<span class="sd"> (as of October 2019, for size >= 1MB allocations).</span>
<span class="sd"> - ``small_pool``: statistics for the small allocation pool</span>
<span class="sd"> (as of October 2019, for size < 1MB allocations).</span>
<span class="sd"> Metric type:</span>
<span class="sd"> - ``current``: current value of this metric.</span>
<span class="sd"> - ``peak``: maximum value of this metric.</span>
<span class="sd"> - ``allocated``: historical total increase in this metric.</span>
<span class="sd"> - ``freed``: historical total decrease in this metric.</span>
<span class="sd"> In addition to the core statistics, we also provide some simple event</span>
<span class="sd"> counters:</span>
<span class="sd"> - ``"num_alloc_retries"``: number of failed ``cudaMalloc`` calls that</span>
<span class="sd"> result in a cache flush and retry.</span>
<span class="sd"> - ``"num_ooms"``: number of out-of-memory errors thrown.</span>
<span class="sd"> The caching allocator can be configured via ENV to not split blocks larger than a</span>
<span class="sd"> defined size (see Memory Management section of the Cuda Semantics documentation).</span>
<span class="sd"> This helps avoid memory fragmentation but may have a performance</span>
<span class="sd"> penalty. Additional outputs to assist with tuning and evaluating impact:</span>
<span class="sd"> - ``"max_split_size"``: blocks above this size will not be split.</span>
<span class="sd"> - ``"oversize_allocations.{current,peak,allocated,freed}"``:</span>
<span class="sd"> number of over-size allocation requests received by the memory allocator.</span>
<span class="sd"> - ``"oversize_segments.{current,peak,allocated,freed}"``:</span>
<span class="sd"> number of over-size reserved segments from ``cudaMalloc()``.</span>
<span class="sd"> The caching allocator can be configured via ENV to round memory allocations in order</span>
<span class="sd"> to reduce fragmentation. Sometimes the overhead from rounding can be higher than</span>
<span class="sd"> the fragmentation it helps reduce. The following stat can be used to check if</span>
<span class="sd"> rounding adds too much overhed:</span>
<span class="sd"> - ``"requested_bytes.{all,large_pool,small_pool}.{current,peak,allocated,freed}"``:</span>
<span class="sd"> memory requested by client code, compare this with allocated_bytes to check if</span>
<span class="sd"> allocation rounding adds too much overhead.</span>
<span class="sd"> Args:</span>
<span class="sd"> device (torch.device or int, optional): selected device. Returns</span>
<span class="sd"> statistics for the current device, given by :func:`~torch.cuda.current_device`,</span>
<span class="sd"> if :attr:`device` is ``None`` (default).</span>
<span class="sd"> .. note::</span>
<span class="sd"> See :ref:`cuda-memory-management` for more details about GPU memory</span>
<span class="sd"> management.</span>
<span class="sd"> .. note::</span>
<span class="sd"> With :ref:`backend:cudaMallocAsync<cuda-memory-envvars>`, some stats are not</span>
<span class="sd"> meaningful, and are always reported as zero.</span>
<span class="sd"> """</span>
<span class="n">result</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">def</span> <span class="nf">_recurse_add_to_result</span><span class="p">(</span><span class="n">prefix</span><span class="p">,</span> <span class="n">obj</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">prefix</span><span class="p">)</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
<span class="n">prefix</span> <span class="o">+=</span> <span class="s2">"."</span>
<span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">obj</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="n">_recurse_add_to_result</span><span class="p">(</span><span class="n">prefix</span> <span class="o">+</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">result</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">prefix</span><span class="p">,</span> <span class="n">obj</span><span class="p">))</span>
<span class="n">stats</span> <span class="o">=</span> <span class="n">memory_stats_as_nested_dict</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">)</span>
<span class="n">_recurse_add_to_result</span><span class="p">(</span><span class="s2">""</span><span class="p">,</span> <span class="n">stats</span><span class="p">)</span>
<span class="n">result</span><span class="o">.</span><span class="n">sort</span><span class="p">()</span>
<span class="k">return</span> <span class="n">collections</span><span class="o">.</span><span class="n">OrderedDict</span><span class="p">(</span><span class="n">result</span><span class="p">)</span></div>
<span class="k">def</span> <span class="nf">memory_stats_as_nested_dict</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]:</span>
<span class="sa">r</span><span class="sd">"""Returns the result of :func:`~torch.cuda.memory_stats` as a nested dictionary."""</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">is_initialized</span><span class="p">():</span>
<span class="k">return</span> <span class="p">{}</span>
<span class="n">device</span> <span class="o">=</span> <span class="n">_get_device_index</span><span class="p">(</span><span class="n">device</span><span class="p">,</span> <span class="n">optional</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="k">return</span> <span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="o">.</span><span class="n">_cuda_memoryStats</span><span class="p">(</span><span class="n">device</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">reset_accumulated_memory_stats</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Resets the "accumulated" (historical) stats tracked by the CUDA memory allocator.</span>
<span class="sd"> See :func:`~torch.cuda.memory_stats` for details. Accumulated stats correspond to</span>
<span class="sd"> the `"allocated"` and `"freed"` keys in each individual stat dict, as well as</span>
<span class="sd"> `"num_alloc_retries"` and `"num_ooms"`.</span>
<span class="sd"> Args:</span>
<span class="sd"> device (torch.device or int, optional): selected device. Returns</span>
<span class="sd"> statistic for the current device, given by :func:`~torch.cuda.current_device`,</span>
<span class="sd"> if :attr:`device` is ``None`` (default).</span>
<span class="sd"> .. note::</span>
<span class="sd"> See :ref:`cuda-memory-management` for more details about GPU memory</span>
<span class="sd"> management.</span>
<span class="sd"> """</span>
<span class="n">device</span> <span class="o">=</span> <span class="n">_get_device_index</span><span class="p">(</span><span class="n">device</span><span class="p">,</span> <span class="n">optional</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="k">return</span> <span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="o">.</span><span class="n">_cuda_resetAccumulatedMemoryStats</span><span class="p">(</span><span class="n">device</span><span class="p">)</span>
<div class="viewcode-block" id="reset_peak_memory_stats"><a class="viewcode-back" href="../../../generated/torch.cuda.reset_peak_memory_stats.html#torch.cuda.reset_peak_memory_stats">[docs]</a><span class="k">def</span> <span class="nf">reset_peak_memory_stats</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Resets the "peak" stats tracked by the CUDA memory allocator.</span>
<span class="sd"> See :func:`~torch.cuda.memory_stats` for details. Peak stats correspond to the</span>
<span class="sd"> `"peak"` key in each individual stat dict.</span>
<span class="sd"> Args:</span>
<span class="sd"> device (torch.device or int, optional): selected device. Returns</span>
<span class="sd"> statistic for the current device, given by :func:`~torch.cuda.current_device`,</span>
<span class="sd"> if :attr:`device` is ``None`` (default).</span>
<span class="sd"> .. note::</span>
<span class="sd"> See :ref:`cuda-memory-management` for more details about GPU memory</span>
<span class="sd"> management.</span>
<span class="sd"> """</span>
<span class="n">device</span> <span class="o">=</span> <span class="n">_get_device_index</span><span class="p">(</span><span class="n">device</span><span class="p">,</span> <span class="n">optional</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="k">return</span> <span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="o">.</span><span class="n">_cuda_resetPeakMemoryStats</span><span class="p">(</span><span class="n">device</span><span class="p">)</span></div>
<div class="viewcode-block" id="reset_max_memory_allocated"><a class="viewcode-back" href="../../../generated/torch.cuda.reset_max_memory_allocated.html#torch.cuda.reset_max_memory_allocated">[docs]</a><span class="k">def</span> <span class="nf">reset_max_memory_allocated</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Resets the starting point in tracking maximum GPU memory occupied by</span>
<span class="sd"> tensors for a given device.</span>
<span class="sd"> See :func:`~torch.cuda.max_memory_allocated` for details.</span>
<span class="sd"> Args:</span>
<span class="sd"> device (torch.device or int, optional): selected device. Returns</span>
<span class="sd"> statistic for the current device, given by :func:`~torch.cuda.current_device`,</span>
<span class="sd"> if :attr:`device` is ``None`` (default).</span>
<span class="sd"> .. warning::</span>
<span class="sd"> This function now calls :func:`~torch.cuda.reset_peak_memory_stats`, which resets</span>
<span class="sd"> /all/ peak memory stats.</span>
<span class="sd"> .. note::</span>
<span class="sd"> See :ref:`cuda-memory-management` for more details about GPU memory</span>
<span class="sd"> management.</span>
<span class="sd"> """</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s2">"torch.cuda.reset_max_memory_allocated now calls torch.cuda.reset_peak_memory_stats, "</span>
<span class="s2">"which resets /all/ peak memory stats."</span><span class="p">,</span>
<span class="ne">FutureWarning</span><span class="p">)</span>
<span class="k">return</span> <span class="n">reset_peak_memory_stats</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">)</span></div>
<div class="viewcode-block" id="reset_max_memory_cached"><a class="viewcode-back" href="../../../generated/torch.cuda.reset_max_memory_cached.html#torch.cuda.reset_max_memory_cached">[docs]</a><span class="k">def</span> <span class="nf">reset_max_memory_cached</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Resets the starting point in tracking maximum GPU memory managed by the</span>
<span class="sd"> caching allocator for a given device.</span>
<span class="sd"> See :func:`~torch.cuda.max_memory_cached` for details.</span>
<span class="sd"> Args:</span>
<span class="sd"> device (torch.device or int, optional): selected device. Returns</span>
<span class="sd"> statistic for the current device, given by :func:`~torch.cuda.current_device`,</span>
<span class="sd"> if :attr:`device` is ``None`` (default).</span>
<span class="sd"> .. warning::</span>
<span class="sd"> This function now calls :func:`~torch.cuda.reset_peak_memory_stats`, which resets</span>
<span class="sd"> /all/ peak memory stats.</span>
<span class="sd"> .. note::</span>
<span class="sd"> See :ref:`cuda-memory-management` for more details about GPU memory</span>
<span class="sd"> management.</span>
<span class="sd"> """</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s2">"torch.cuda.reset_max_memory_cached now calls torch.cuda.reset_peak_memory_stats, "</span>
<span class="s2">"which resets /all/ peak memory stats."</span><span class="p">,</span>
<span class="ne">FutureWarning</span><span class="p">)</span>
<span class="k">return</span> <span class="n">reset_peak_memory_stats</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">)</span></div>
<div class="viewcode-block" id="memory_allocated"><a class="viewcode-back" href="../../../generated/torch.cuda.memory_allocated.html#torch.cuda.memory_allocated">[docs]</a><span class="k">def</span> <span class="nf">memory_allocated</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Returns the current GPU memory occupied by tensors in bytes for a given</span>
<span class="sd"> device.</span>
<span class="sd"> Args:</span>
<span class="sd"> device (torch.device or int, optional): selected device. Returns</span>
<span class="sd"> statistic for the current device, given by :func:`~torch.cuda.current_device`,</span>
<span class="sd"> if :attr:`device` is ``None`` (default).</span>
<span class="sd"> .. note::</span>
<span class="sd"> This is likely less than the amount shown in `nvidia-smi` since some</span>
<span class="sd"> unused memory can be held by the caching allocator and some context</span>
<span class="sd"> needs to be created on GPU. See :ref:`cuda-memory-management` for more</span>
<span class="sd"> details about GPU memory management.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">memory_stats</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">)</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"allocated_bytes.all.current"</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span></div>
<div class="viewcode-block" id="max_memory_allocated"><a class="viewcode-back" href="../../../generated/torch.cuda.max_memory_allocated.html#torch.cuda.max_memory_allocated">[docs]</a><span class="k">def</span> <span class="nf">max_memory_allocated</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Returns the maximum GPU memory occupied by tensors in bytes for a given</span>
<span class="sd"> device.</span>
<span class="sd"> By default, this returns the peak allocated memory since the beginning of</span>
<span class="sd"> this program. :func:`~torch.cuda.reset_peak_memory_stats` can be used to</span>
<span class="sd"> reset the starting point in tracking this metric. For example, these two</span>
<span class="sd"> functions can measure the peak allocated memory usage of each iteration in a</span>
<span class="sd"> training loop.</span>
<span class="sd"> Args:</span>
<span class="sd"> device (torch.device or int, optional): selected device. Returns</span>
<span class="sd"> statistic for the current device, given by :func:`~torch.cuda.current_device`,</span>
<span class="sd"> if :attr:`device` is ``None`` (default).</span>
<span class="sd"> .. note::</span>
<span class="sd"> See :ref:`cuda-memory-management` for more details about GPU memory</span>
<span class="sd"> management.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">memory_stats</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">)</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"allocated_bytes.all.peak"</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span></div>
<div class="viewcode-block" id="memory_reserved"><a class="viewcode-back" href="../../../generated/torch.cuda.memory_reserved.html#torch.cuda.memory_reserved">[docs]</a><span class="k">def</span> <span class="nf">memory_reserved</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Returns the current GPU memory managed by the caching allocator in bytes</span>
<span class="sd"> for a given device.</span>
<span class="sd"> Args:</span>
<span class="sd"> device (torch.device or int, optional): selected device. Returns</span>
<span class="sd"> statistic for the current device, given by :func:`~torch.cuda.current_device`,</span>
<span class="sd"> if :attr:`device` is ``None`` (default).</span>
<span class="sd"> .. note::</span>
<span class="sd"> See :ref:`cuda-memory-management` for more details about GPU memory</span>
<span class="sd"> management.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">memory_stats</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">)</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"reserved_bytes.all.current"</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span></div>
<div class="viewcode-block" id="max_memory_reserved"><a class="viewcode-back" href="../../../generated/torch.cuda.max_memory_reserved.html#torch.cuda.max_memory_reserved">[docs]</a><span class="k">def</span> <span class="nf">max_memory_reserved</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Returns the maximum GPU memory managed by the caching allocator in bytes</span>
<span class="sd"> for a given device.</span>
<span class="sd"> By default, this returns the peak cached memory since the beginning of this</span>
<span class="sd"> program. :func:`~torch.cuda.reset_peak_memory_stats` can be used to reset</span>
<span class="sd"> the starting point in tracking this metric. For example, these two functions</span>
<span class="sd"> can measure the peak cached memory amount of each iteration in a training</span>
<span class="sd"> loop.</span>
<span class="sd"> Args:</span>
<span class="sd"> device (torch.device or int, optional): selected device. Returns</span>
<span class="sd"> statistic for the current device, given by :func:`~torch.cuda.current_device`,</span>
<span class="sd"> if :attr:`device` is ``None`` (default).</span>
<span class="sd"> .. note::</span>
<span class="sd"> See :ref:`cuda-memory-management` for more details about GPU memory</span>
<span class="sd"> management.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">memory_stats</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">)</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"reserved_bytes.all.peak"</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span></div>
<div class="viewcode-block" id="memory_cached"><a class="viewcode-back" href="../../../generated/torch.cuda.memory_cached.html#torch.cuda.memory_cached">[docs]</a><span class="k">def</span> <span class="nf">memory_cached</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Deprecated; see :func:`~torch.cuda.memory_reserved`."""</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s2">"torch.cuda.memory_cached has been renamed to torch.cuda.memory_reserved"</span><span class="p">,</span>
<span class="ne">FutureWarning</span><span class="p">)</span>
<span class="k">return</span> <span class="n">memory_reserved</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">)</span></div>
<div class="viewcode-block" id="max_memory_cached"><a class="viewcode-back" href="../../../generated/torch.cuda.max_memory_cached.html#torch.cuda.max_memory_cached">[docs]</a><span class="k">def</span> <span class="nf">max_memory_cached</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Deprecated; see :func:`~torch.cuda.max_memory_reserved`."""</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s2">"torch.cuda.max_memory_cached has been renamed to torch.cuda.max_memory_reserved"</span><span class="p">,</span>
<span class="ne">FutureWarning</span><span class="p">)</span>
<span class="k">return</span> <span class="n">max_memory_reserved</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">)</span></div>
<div class="viewcode-block" id="memory_snapshot"><a class="viewcode-back" href="../../../generated/torch.cuda.memory_snapshot.html#torch.cuda.memory_snapshot">[docs]</a><span class="k">def</span> <span class="nf">memory_snapshot</span><span class="p">():</span>
<span class="sa">r</span><span class="sd">"""Returns a snapshot of the CUDA memory allocator state across all devices.</span>
<span class="sd"> Interpreting the output of this function requires familiarity with the</span>
<span class="sd"> memory allocator internals.</span>
<span class="sd"> .. note::</span>
<span class="sd"> See :ref:`cuda-memory-management` for more details about GPU memory</span>
<span class="sd"> management.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">torch</span><span class="o">.</span><span class="n">_C</span><span class="o">.</span><span class="n">_cuda_memorySnapshot</span><span class="p">()[</span><span class="s1">'segments'</span><span class="p">]</span></div>
<div class="viewcode-block" id="memory_summary"><a class="viewcode-back" href="../../../generated/torch.cuda.memory_summary.html#torch.cuda.memory_summary">[docs]</a><span class="k">def</span> <span class="nf">memory_summary</span><span class="p">(</span><span class="n">device</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Device</span><span class="p">,</span> <span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">abbreviated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Returns a human-readable printout of the current memory allocator</span>
<span class="sd"> statistics for a given device.</span>
<span class="sd"> This can be useful to display periodically during training, or when</span>
<span class="sd"> handling out-of-memory exceptions.</span>
<span class="sd"> Args:</span>
<span class="sd"> device (torch.device or int, optional): selected device. Returns</span>
<span class="sd"> printout for the current device, given by :func:`~torch.cuda.current_device`,</span>
<span class="sd"> if :attr:`device` is ``None`` (default).</span>
<span class="sd"> abbreviated (bool, optional): whether to return an abbreviated summary</span>
<span class="sd"> (default: False).</span>
<span class="sd"> .. note::</span>
<span class="sd"> See :ref:`cuda-memory-management` for more details about GPU memory</span>
<span class="sd"> management.</span>
<span class="sd"> """</span>
<span class="n">device</span> <span class="o">=</span> <span class="n">_get_device_index</span><span class="p">(</span><span class="n">device</span><span class="p">,</span> <span class="n">optional</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="n">stats</span> <span class="o">=</span> <span class="n">memory_stats</span><span class="p">(</span><span class="n">device</span><span class="o">=</span><span class="n">device</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_format_size</span><span class="p">(</span><span class="n">sz</span><span class="p">,</span> <span class="n">pref_sz</span><span class="p">):</span>
<span class="n">prefixes</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"B "</span><span class="p">,</span> <span class="s2">"KiB"</span><span class="p">,</span> <span class="s2">"MiB"</span><span class="p">,</span> <span class="s2">"GiB"</span><span class="p">,</span> <span class="s2">"TiB"</span><span class="p">,</span> <span class="s2">"PiB"</span><span class="p">]</span>
<span class="n">prefix</span> <span class="o">=</span> <span class="n">prefixes</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">for</span> <span class="n">new_prefix</span> <span class="ow">in</span> <span class="n">prefixes</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span>
<span class="k">if</span> <span class="n">pref_sz</span> <span class="o"><</span> <span class="mi">768</span> <span class="o">*</span> <span class="mi">1024</span><span class="p">:</span>
<span class="k">break</span>
<span class="n">prefix</span> <span class="o">=</span> <span class="n">new_prefix</span>
<span class="n">sz</span> <span class="o">//=</span> <span class="mi">1024</span>
<span class="n">pref_sz</span> <span class="o">/=</span> <span class="mi">1024</span>
<span class="k">return</span> <span class="s2">"</span><span class="si">{:6d}</span><span class="s2"> </span><span class="si">{}</span><span class="s2">"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">sz</span><span class="p">,</span> <span class="n">prefix</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_format_count</span><span class="p">(</span><span class="n">cnt</span><span class="p">,</span> <span class="n">pref_cnt</span><span class="p">):</span>
<span class="n">prefixes</span> <span class="o">=</span> <span class="p">[</span><span class="s2">" "</span><span class="p">,</span> <span class="s2">"K"</span><span class="p">,</span> <span class="s2">"M"</span><span class="p">]</span>
<span class="n">prefix</span> <span class="o">=</span> <span class="n">prefixes</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">for</span> <span class="n">new_prefix</span> <span class="ow">in</span> <span class="n">prefixes</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span>
<span class="k">if</span> <span class="n">pref_cnt</span> <span class="o"><</span> <span class="mi">750</span> <span class="o">*</span> <span class="mi">1000</span><span class="p">:</span>
<span class="k">break</span>
<span class="n">prefix</span> <span class="o">=</span> <span class="n">new_prefix</span>
<span class="n">cnt</span> <span class="o">//=</span> <span class="mi">1000</span>
<span class="n">pref_cnt</span> <span class="o">/=</span> <span class="mi">1000</span>
<span class="k">return</span> <span class="s2">"</span><span class="si">{:7d}</span><span class="s2"> </span><span class="si">{}</span><span class="s2"> "</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">cnt</span><span class="p">,</span> <span class="n">prefix</span><span class="p">)</span>
<span class="n">metrics_to_display</span> <span class="o">=</span> <span class="p">[</span>
<span class="p">(</span><span class="s2">"allocated_bytes"</span><span class="p">,</span> <span class="s2">"Allocated memory"</span><span class="p">,</span> <span class="n">_format_size</span><span class="p">),</span>
<span class="p">(</span><span class="s2">"active_bytes"</span><span class="p">,</span> <span class="s2">"Active memory"</span><span class="p">,</span> <span class="n">_format_size</span><span class="p">),</span>
<span class="p">(</span><span class="s2">"requested_bytes"</span><span class="p">,</span> <span class="s2">"Requested memory"</span><span class="p">,</span> <span class="n">_format_size</span><span class="p">),</span>
<span class="p">(</span><span class="s2">"reserved_bytes"</span><span class="p">,</span> <span class="s2">"GPU reserved memory"</span><span class="p">,</span> <span class="n">_format_size</span><span class="p">),</span>
<span class="p">(</span><span class="s2">"inactive_split_bytes"</span><span class="p">,</span> <span class="s2">"Non-releasable memory"</span><span class="p">,</span> <span class="n">_format_size</span><span class="p">),</span>
<span class="p">(</span><span class="s2">"allocation"</span><span class="p">,</span> <span class="s2">"Allocations"</span><span class="p">,</span> <span class="n">_format_count</span><span class="p">),</span>
<span class="p">(</span><span class="s2">"active"</span><span class="p">,</span> <span class="s2">"Active allocs"</span><span class="p">,</span> <span class="n">_format_count</span><span class="p">),</span>
<span class="p">(</span><span class="s2">"segment"</span><span class="p">,</span> <span class="s2">"GPU reserved segments"</span><span class="p">,</span> <span class="n">_format_count</span><span class="p">),</span>
<span class="p">(</span><span class="s2">"inactive_split"</span><span class="p">,</span> <span class="s2">"Non-releasable allocs"</span><span class="p">,</span> <span class="n">_format_count</span><span class="p">),</span>
<span class="p">]</span>
<span class="n">lines</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">lines</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"="</span> <span class="o">*</span> <span class="mi">75</span><span class="p">)</span>
<span class="n">lines</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">" </span><span class="si">{_:16}</span><span class="s2"> PyTorch CUDA memory summary, device ID </span><span class="si">{device:<17d}</span><span class="s2"> "</span><span class="p">)</span>
<span class="n">lines</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"-"</span> <span class="o">*</span> <span class="mi">75</span><span class="p">)</span>
<span class="n">lines</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">" </span><span class="si">{_:9}</span><span class="s2"> CUDA OOMs: </span><span class="si">{num_ooms:<12d}</span><span class="s2"> | </span><span class="si">{_:6}</span><span class="s2"> cudaMalloc retries: </span><span class="si">{num_alloc_retries:<8d}</span><span class="s2"> "</span><span class="p">)</span>
<span class="n">lines</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"="</span> <span class="o">*</span> <span class="mi">75</span><span class="p">)</span>
<span class="n">lines</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">" Metric | Cur Usage | Peak Usage | Tot Alloc | Tot Freed "</span><span class="p">)</span>
<span class="k">for</span> <span class="n">metric_key</span><span class="p">,</span> <span class="n">metric_name</span><span class="p">,</span> <span class="n">formatter</span> <span class="ow">in</span> <span class="n">metrics_to_display</span><span class="p">:</span>
<span class="n">lines</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"-"</span> <span class="o">*</span> <span class="mi">75</span><span class="p">)</span>
<span class="n">submetrics</span> <span class="o">=</span> <span class="p">[(</span><span class="s2">"all"</span><span class="p">,</span> <span class="n">metric_name</span><span class="p">)]</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">abbreviated</span><span class="p">:</span>
<span class="n">submetrics</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="s2">"large_pool"</span><span class="p">,</span> <span class="s2">" from large pool"</span><span class="p">))</span>
<span class="n">submetrics</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="s2">"small_pool"</span><span class="p">,</span> <span class="s2">" from small pool"</span><span class="p">))</span>
<span class="n">current_prefval</span><span class="p">,</span> <span class="n">peak_prefval</span><span class="p">,</span> <span class="n">allocated_prefval</span><span class="p">,</span> <span class="n">freed_prefval</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="kc">None</span><span class="p">,</span> <span class="kc">None</span><span class="p">,</span> <span class="kc">None</span>
<span class="k">for</span> <span class="n">submetric_key</span><span class="p">,</span> <span class="n">submetric_name</span> <span class="ow">in</span> <span class="n">submetrics</span><span class="p">:</span>
<span class="n">prefix</span> <span class="o">=</span> <span class="n">metric_key</span> <span class="o">+</span> <span class="s2">"."</span> <span class="o">+</span> <span class="n">submetric_key</span> <span class="o">+</span> <span class="s2">"."</span>
<span class="n">current</span> <span class="o">=</span> <span class="n">stats</span><span class="p">[</span><span class="n">prefix</span> <span class="o">+</span> <span class="s2">"current"</span><span class="p">]</span>
<span class="n">peak</span> <span class="o">=</span> <span class="n">stats</span><span class="p">[</span><span class="n">prefix</span> <span class="o">+</span> <span class="s2">"peak"</span><span class="p">]</span>
<span class="n">allocated</span> <span class="o">=</span> <span class="n">stats</span><span class="p">[</span><span class="n">prefix</span> <span class="o">+</span> <span class="s2">"allocated"</span><span class="p">]</span>
<span class="n">freed</span> <span class="o">=</span> <span class="n">stats</span><span class="p">[</span><span class="n">prefix</span> <span class="o">+</span> <span class="s2">"freed"</span><span class="p">]</span>
<span class="k">if</span> <span class="n">current_prefval</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">current_prefval</span> <span class="o">=</span> <span class="n">current</span>
<span class="n">peak_prefval</span> <span class="o">=</span> <span class="n">peak</span>
<span class="n">allocated_prefval</span> <span class="o">=</span> <span class="n">allocated</span>
<span class="n">freed_prefval</span> <span class="o">=</span> <span class="n">freed</span>
<span class="n">lines</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">" </span><span class="si">{:<21}</span><span class="s2"> | </span><span class="si">{}</span><span class="s2"> | </span><span class="si">{}</span><span class="s2"> | </span><span class="si">{}</span><span class="s2"> | </span><span class="si">{}</span><span class="s2"> "</span><span class="o">.</span><span class="n">format</span><span class="p">(</span>
<span class="n">submetric_name</span><span class="p">,</span>
<span class="n">formatter</span><span class="p">(</span><span class="n">current</span><span class="p">,</span> <span class="n">current_prefval</span><span class="p">),</span>
<span class="n">formatter</span><span class="p">(</span><span class="n">peak</span><span class="p">,</span> <span class="n">peak_prefval</span><span class="p">),</span>
<span class="n">formatter</span><span class="p">(</span><span class="n">allocated</span><span class="p">,</span> <span class="n">allocated_prefval</span><span class="p">),</span>
<span class="n">formatter</span><span class="p">(</span><span class="n">freed</span><span class="p">,</span> <span class="n">freed_prefval</span><span class="p">)),</span>
<span class="p">)</span>
<span class="n">metrics_to_display</span> <span class="o">=</span> <span class="p">[</span>
<span class="p">(</span><span class="s2">"oversize_allocations"</span><span class="p">,</span> <span class="s2">"Oversize allocations"</span><span class="p">,</span> <span class="n">_format_count</span><span class="p">),</span>
<span class="p">(</span><span class="s2">"oversize_segments"</span><span class="p">,</span> <span class="s2">"Oversize GPU segments"</span><span class="p">,</span> <span class="n">_format_count</span><span class="p">),</span>
<span class="p">]</span>
<span class="k">for</span> <span class="n">metric_key</span><span class="p">,</span> <span class="n">metric_name</span><span class="p">,</span> <span class="n">formatter</span> <span class="ow">in</span> <span class="n">metrics_to_display</span><span class="p">:</span>