File size: 40,580 Bytes
e45d058
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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
<!doctype html>
<html class="no-js" lang="en">
  <head><meta charset="utf-8"/>
    <meta name="viewport" content="width=device-width,initial-scale=1"/>
    <meta name="color-scheme" content="light dark"><meta name="generator" content="Docutils 0.19: https://docutils.sourceforge.io/" />
<link rel="index" title="Index" href="genindex.html" /><link rel="search" title="Search" href="search.html" /><link rel="next" title="Installation" href="install.html" />
        <link rel="canonical" href="docs/index.html" />

    <!-- Generated with Sphinx 6.1.3 and Furo 2023.03.27 -->
        <title>CUTLASS Python</title>
      <link rel="stylesheet" type="text/css" href="_static/pygments.css" />
    <link rel="stylesheet" type="text/css" href="_static/styles/furo.css?digest=fad236701ea90a88636c2a8c73b44ae642ed2a53" />
    <link rel="stylesheet" type="text/css" href="_static/copybutton.css" />
    <link rel="stylesheet" type="text/css" href="_static/tabs.css" />
    <link rel="stylesheet" type="text/css" href="_static/styles/furo-extensions.css?digest=30d1aed668e5c3a91c3e3bf6a60b675221979f0e" />
    
    


<style>

  body {

    --color-code-background: #eeffcc;

  --color-code-foreground: black;

  --color-brand-primary: #76B900;

  --color-brand-content: #76B900;

  

  }

  @media not print {

    body[data-theme="dark"] {

      --color-code-background: #272822;

  --color-code-foreground: #f8f8f2;

  --color-brand-primary: #76B900;

  --color-brand-content: #76B900;

  

    }

    @media (prefers-color-scheme: dark) {

      body:not([data-theme="light"]) {

        --color-code-background: #272822;

  --color-code-foreground: #f8f8f2;

  --color-brand-primary: #76B900;

  --color-brand-content: #76B900;

  

      }

    }

  }

</style></head>
  <body>
    
    <script>

      document.body.dataset.theme = localStorage.getItem("theme") || "auto";

    </script>
    

<svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
  <symbol id="svg-toc" viewBox="0 0 24 24">
    <title>Contents</title>
    <svg stroke="currentColor" fill="currentColor" stroke-width="0" viewBox="0 0 1024 1024">
      <path d="M408 442h480c4.4 0 8-3.6 8-8v-56c0-4.4-3.6-8-8-8H408c-4.4 0-8 3.6-8 8v56c0 4.4 3.6 8 8 8zm-8 204c0 4.4 3.6 8 8 8h480c4.4 0 8-3.6 8-8v-56c0-4.4-3.6-8-8-8H408c-4.4 0-8 3.6-8 8v56zm504-486H120c-4.4 0-8 3.6-8 8v56c0 4.4 3.6 8 8 8h784c4.4 0 8-3.6 8-8v-56c0-4.4-3.6-8-8-8zm0 632H120c-4.4 0-8 3.6-8 8v56c0 4.4 3.6 8 8 8h784c4.4 0 8-3.6 8-8v-56c0-4.4-3.6-8-8-8zM115.4 518.9L271.7 642c5.8 4.6 14.4.5 14.4-6.9V388.9c0-7.4-8.5-11.5-14.4-6.9L115.4 505.1a8.74 8.74 0 0 0 0 13.8z"/>
    </svg>
  </symbol>
  <symbol id="svg-menu" viewBox="0 0 24 24">
    <title>Menu</title>
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor"

      stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather-menu">
      <line x1="3" y1="12" x2="21" y2="12"></line>
      <line x1="3" y1="6" x2="21" y2="6"></line>
      <line x1="3" y1="18" x2="21" y2="18"></line>
    </svg>
  </symbol>
  <symbol id="svg-arrow-right" viewBox="0 0 24 24">
    <title>Expand</title>
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor"

      stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather-chevron-right">
      <polyline points="9 18 15 12 9 6"></polyline>
    </svg>
  </symbol>
  <symbol id="svg-sun" viewBox="0 0 24 24">
    <title>Light mode</title>
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor"

      stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" class="feather-sun">
      <circle cx="12" cy="12" r="5"></circle>
      <line x1="12" y1="1" x2="12" y2="3"></line>
      <line x1="12" y1="21" x2="12" y2="23"></line>
      <line x1="4.22" y1="4.22" x2="5.64" y2="5.64"></line>
      <line x1="18.36" y1="18.36" x2="19.78" y2="19.78"></line>
      <line x1="1" y1="12" x2="3" y2="12"></line>
      <line x1="21" y1="12" x2="23" y2="12"></line>
      <line x1="4.22" y1="19.78" x2="5.64" y2="18.36"></line>
      <line x1="18.36" y1="5.64" x2="19.78" y2="4.22"></line>
    </svg>
  </symbol>
  <symbol id="svg-moon" viewBox="0 0 24 24">
    <title>Dark mode</title>
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor"

      stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" class="icon-tabler-moon">
      <path stroke="none" d="M0 0h24v24H0z" fill="none" />
      <path d="M12 3c.132 0 .263 0 .393 0a7.5 7.5 0 0 0 7.92 12.446a9 9 0 1 1 -8.313 -12.454z" />
    </svg>
  </symbol>
  <symbol id="svg-sun-half" viewBox="0 0 24 24">
    <title>Auto light/dark mode</title>
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor"

      stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" class="icon-tabler-shadow">
      <path stroke="none" d="M0 0h24v24H0z" fill="none"/>
      <circle cx="12" cy="12" r="9" />
      <path d="M13 12h5" />
      <path d="M13 15h4" />
      <path d="M13 18h1" />
      <path d="M13 9h4" />
      <path d="M13 6h1" />
    </svg>
  </symbol>
</svg>

<input type="checkbox" class="sidebar-toggle" name="__navigation" id="__navigation">
<input type="checkbox" class="sidebar-toggle" name="__toc" id="__toc">
<label class="overlay sidebar-overlay" for="__navigation">
  <div class="visually-hidden">Hide navigation sidebar</div>
</label>
<label class="overlay toc-overlay" for="__toc">
  <div class="visually-hidden">Hide table of contents sidebar</div>
</label>



<div class="page">
  <header class="mobile-header">
    <div class="header-left">
      <label class="nav-overlay-icon" for="__navigation">
        <div class="visually-hidden">Toggle site navigation sidebar</div>
        <i class="icon"><svg><use href="#svg-menu"></use></svg></i>
      </label>
    </div>
    <div class="header-center">
      <a href="#"><div class="brand">CUTLASS Python</div></a>
    </div>
    <div class="header-right">
      <div class="theme-toggle-container theme-toggle-header">
        <button class="theme-toggle">
          <div class="visually-hidden">Toggle Light / Dark / Auto color theme</div>
          <svg class="theme-icon-when-auto"><use href="#svg-sun-half"></use></svg>
          <svg class="theme-icon-when-dark"><use href="#svg-moon"></use></svg>
          <svg class="theme-icon-when-light"><use href="#svg-sun"></use></svg>
        </button>
      </div>
      <label class="toc-overlay-icon toc-header-icon" for="__toc">
        <div class="visually-hidden">Toggle table of contents sidebar</div>
        <i class="icon"><svg><use href="#svg-toc"></use></svg></i>
      </label>
    </div>
  </header>
  <aside class="sidebar-drawer">
    <div class="sidebar-container">
      
      <div class="sidebar-sticky"><a class="sidebar-brand" href="#">
  
  <div class="sidebar-logo-container">
    <img class="sidebar-logo only-light" src="_static/cutlass-logo-small.png" alt="Light Logo"/>
    <img class="sidebar-logo only-dark" src="_static/cutlass-logo-small.png" alt="Dark Logo"/>
  </div>
  
  <span class="sidebar-brand-text">CUTLASS Python</span>
  
</a><form class="sidebar-search-container" method="get" action="search.html" role="search">
  <input class="sidebar-search" placeholder="Search" name="q" aria-label="Search">
  <input type="hidden" name="check_keywords" value="yes">
  <input type="hidden" name="area" value="default">
</form>
<div id="searchbox"></div><div class="sidebar-scroll"><div class="sidebar-tree">
  <ul class="current">
<li class="toctree-l1 current current-page"><a class="current reference internal" href="#">Home</a></li>
</ul>
<p class="caption" role="heading"><span class="caption-text">Getting Started:</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="install.html">Installation</a></li>
<li class="toctree-l1"><a class="reference internal" href="externals/00_basic_gemm.html">Getting Started</a></li>
<li class="toctree-l1"><a class="reference internal" href="contribute.html">Contributing</a></li>
</ul>
<p class="caption" role="heading"><span class="caption-text">Python Documentation:</span></p>
<ul>
<li class="toctree-l1 has-children"><a class="reference internal" href="modules.html">CUTLASS Python API</a><input class="toctree-checkbox" id="toctree-checkbox-1" name="toctree-checkbox-1" role="switch" type="checkbox"/><label for="toctree-checkbox-1"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l2 has-children"><a class="reference internal" href="cutlass.html">CUTLASS</a><input class="toctree-checkbox" id="toctree-checkbox-2" name="toctree-checkbox-2" role="switch" type="checkbox"/><label for="toctree-checkbox-2"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="cutlass.emit.html">Emitters</a></li>
<li class="toctree-l3"><a class="reference internal" href="cutlass.op.html">Operations</a></li>
<li class="toctree-l3"><a class="reference internal" href="cutlass.utils.html">Utilities</a></li>
</ul>
</li>
</ul>
</li>
</ul>
<p class="caption" role="heading"><span class="caption-text">Examples and Tutorials:</span></p>
<ul>
<li class="toctree-l1 has-children"><a class="reference internal" href="examples.html">Examples</a><input class="toctree-checkbox" id="toctree-checkbox-3" name="toctree-checkbox-3" role="switch" type="checkbox"/><label for="toctree-checkbox-3"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l2"><a class="reference internal" href="externals/00_basic_gemm.html">Basic GEMM</a></li>
<li class="toctree-l2"><a class="reference internal" href="externals/01_epilogue.html">Epilogue</a></li>
<li class="toctree-l2"><a class="reference internal" href="externals/02_pytorch_extension_grouped_gemm.html">PyTorch Extension</a></li>
</ul>
</li>
</ul>
<p class="caption" role="heading"><span class="caption-text">Reference:</span></p>
<ul>
<li class="toctree-l1"><a class="reference external" href="https://github.com/NVIDIA/cutlass">Github</a></li>
</ul>

</div>
</div>

      </div>
      
    </div>
  </aside>
  <div class="main">
    <div class="content">
      <div class="article-container">
        <a href="#" class="back-to-top muted-link">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
            <path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8v12z"></path>
          </svg>
          <span>Back to top</span>
        </a>
        <div class="content-icon-container">
          
<div class="theme-toggle-container theme-toggle-content">
            <button class="theme-toggle">
              <div class="visually-hidden">Toggle Light / Dark / Auto color theme</div>
              <svg class="theme-icon-when-auto"><use href="#svg-sun-half"></use></svg>
              <svg class="theme-icon-when-dark"><use href="#svg-moon"></use></svg>
              <svg class="theme-icon-when-light"><use href="#svg-sun"></use></svg>
            </button>
          </div>
          <label class="toc-overlay-icon toc-content-icon" for="__toc">
            <div class="visually-hidden">Toggle table of contents sidebar</div>
            <i class="icon"><svg><use href="#svg-toc"></use></svg></i>
          </label>
        </div>
        <article role="main">
          <section id="cutlass-python-interface">
<h1>CUTLASS Python Interface<a class="headerlink" href="#cutlass-python-interface" title="Permalink to this heading">#</a></h1>
<p>The CUTLASS Python interface enables one to compile and run CUTLASS operations from within Python.</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">cutlass</span>
<span class="kn">import</span> <span class="nn">numpy</span> <span class="k">as</span> <span class="nn">np</span>

<span class="n">plan</span> <span class="o">=</span> <span class="n">cutlass</span><span class="o">.</span><span class="n">op</span><span class="o">.</span><span class="n">Gemm</span><span class="p">(</span><span class="n">element</span><span class="o">=</span><span class="n">np</span><span class="o">.</span><span class="n">float16</span><span class="p">,</span> <span class="n">layout</span><span class="o">=</span><span class="n">cutlass</span><span class="o">.</span><span class="n">LayoutType</span><span class="o">.</span><span class="n">RowMajor</span><span class="p">)</span>
<span class="n">A</span><span class="p">,</span> <span class="n">B</span><span class="p">,</span> <span class="n">C</span><span class="p">,</span> <span class="n">D</span> <span class="o">=</span> <span class="p">[</span><span class="n">np</span><span class="o">.</span><span class="n">ones</span><span class="p">((</span><span class="mi">4096</span><span class="p">,</span> <span class="mi">4096</span><span class="p">),</span> <span class="n">dtype</span><span class="o">=</span><span class="n">np</span><span class="o">.</span><span class="n">float16</span><span class="p">)</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">4</span><span class="p">)]</span>
<span class="n">plan</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="n">A</span><span class="p">,</span> <span class="n">B</span><span class="p">,</span> <span class="n">C</span><span class="p">,</span> <span class="n">D</span><span class="p">)</span>
</pre></div>
</div>
<p><strong>NOTE:</strong> The CUTLASS Python interface is currently an experimental release. The API may change in the future.
We welcome feedback from the community.</p>
<section id="overview">
<h2>Overview<a class="headerlink" href="#overview" title="Permalink to this heading">#</a></h2>
<p>The CUTLASS Python interface aims to provide an ease-of-use interface for using CUTLASS via Python. Toward this goal,
the CUTLASS Python interface attempts to:</p>
<ul class="simple">
<li><p>Present high-level interfaces for operators that require only few parameters</p></li>
<li><p>Select sensible default configurations for an operator given the parameters that have been specified</p></li>
<li><p>Enumerate configurations for users that are known to work in a given setting</p></li>
<li><p>Reduce the occurrence of C++ compile-time errors in favor of descriptive Python exceptions</p></li>
<li><p>Make it easy to export CUTLASS kernels to framework extensions (e.g., PyTorch CUDA extensions)</p></li>
</ul>
<section id="non-goals">
<h3>Non-goals<a class="headerlink" href="#non-goals" title="Permalink to this heading">#</a></h3>
<p>The CUTLASS Python interface does not intended to:</p>
<p><strong>Select optimal kernel configurations.</strong>
As an ease-of-use interface, the default selections for operator parameters made by the CUTLASS Python interface may
not achieve the highest possible performance in all scenarios. Users wishing to achieve the highest performance possible
should consider profile different combinations of configuration parameters, or use a library such as <a class="reference external" href="https://developer.nvidia.com/cublas">cuBLAS</a>
that contains heuristics for selecting kernels.</p>
<p><strong>Act as a fast container for CUTLASS kernels.</strong>
The CUTLASS Python interface does not strive to minimize overhead in its Python functions surrounding the running of a kernel.
Those wishing to deploy a CUTLASS kernel should consider either using the C++ emitted by the Python interface directly, or using
one of the CUTLASS emitters for automatically creating a framework extension for the kernel (e.g., a PyTorch CUDA extension).</p>
<p><strong>Act as a Python-to-CUDA-kernel JIT compilation engine.</strong>
The CUTLASS Python interface intends to enable one to use CUTLASS via Python. It can be used by frameworks for JIT compiling
Python to CUDA kernels, but does not set out to be such a framework.</p>
</section>
<section id="comparison-to-pycutlass">
<h3>Comparison to PyCUTLASS<a class="headerlink" href="#comparison-to-pycutlass" title="Permalink to this heading">#</a></h3>
<p>The CUTLASS Python interface builds atop CUTLASS’s <a class="reference external" href="https://github.com/NVIDIA/cutlass/tree/v3.0.0/tools/library/scripts/pycutlass">PyCUTLASS</a> library. PyCUTLASS enables
one to declare, compile, and run GEMMs, convolutions, and grouped GEMM operators with nearly the same configuration
space as CUTLASS’s C++ interface. While this flexibility enables one to achieve the similar levels of functionality
as available in CUTLASS’s C++ interface, it comes with the burden of needing to specify many configuration parameters
to operators – similar to what one must do in specifying template parameters to operations in CUTLASS’s C++ interface.</p>
<p>In contrast, the CUTLASS Python interface aims to provide a higher-level API for declaring, emitting, and compiling
kernels that does not require exhaustively defining template parameters.</p>
<section id="transitioning-from-pycutlass">
<h4>Transitioning from PyCUTLASS<a class="headerlink" href="#transitioning-from-pycutlass" title="Permalink to this heading">#</a></h4>
<p>At present, existing PyCUTLASS functionality remains available via the CUTLASS Python interface. One can
continue to use PyCUTLASS by replacing references to the PyCUTLASS <code class="docutils literal notranslate"><span class="pre">cutlass</span></code> module with <code class="docutils literal notranslate"><span class="pre">cutlass_bindings</span></code>
and the PyCUTLASS <code class="docutils literal notranslate"><span class="pre">pycutlass</span></code> module with <code class="docutils literal notranslate"><span class="pre">cutlass.backend</span></code>.</p>
<p>For example, the following code using PyCUTLASS:</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">pycutlass</span>
<span class="kn">import</span> <span class="nn">cutlass</span>

<span class="n">math_inst</span> <span class="o">=</span> <span class="n">pycutlass</span><span class="o">.</span><span class="n">MathInstruction</span><span class="p">(</span>
    <span class="p">[</span><span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">],</span> <span class="n">cutlass</span><span class="o">.</span><span class="n">float32</span><span class="p">,</span> <span class="n">cutlass</span><span class="o">.</span><span class="n">float32</span><span class="p">,</span> <span class="n">cutlass</span><span class="o">.</span><span class="n">float32</span><span class="p">,</span>
    <span class="n">cutlass</span><span class="o">.</span><span class="n">OpClass</span><span class="o">.</span><span class="n">Simt</span><span class="p">,</span> <span class="n">pycutlass</span><span class="o">.</span><span class="n">MathOperation</span><span class="o">.</span><span class="n">multiply_add</span>
<span class="p">)</span>
</pre></div>
</div>
<p>can work with the Python interface via:</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">cutlass.backend</span> <span class="k">as</span> <span class="nn">pycutlass</span>
<span class="kn">import</span> <span class="nn">cutlass_bindings</span>

<span class="n">math_inst</span> <span class="o">=</span> <span class="n">pycutlass</span><span class="o">.</span><span class="n">MathInstruction</span><span class="p">(</span>
    <span class="p">[</span><span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">],</span> <span class="n">cutlass_bindings</span><span class="o">.</span><span class="n">float32</span><span class="p">,</span> <span class="n">cutlass_bindings</span><span class="o">.</span><span class="n">float32</span><span class="p">,</span> <span class="n">cutlass_bindings</span><span class="o">.</span><span class="n">float32</span><span class="p">,</span>
    <span class="n">cutlass_bindings</span><span class="o">.</span><span class="n">OpClass</span><span class="o">.</span><span class="n">Simt</span><span class="p">,</span> <span class="n">pycutlass</span><span class="o">.</span><span class="n">MathOperation</span><span class="o">.</span><span class="n">multiply_add</span>
<span class="p">)</span>
</pre></div>
</div>
<p><strong>NOTE:</strong> backwards compatibility of <code class="docutils literal notranslate"><span class="pre">cutlass.backend</span></code> with <code class="docutils literal notranslate"><span class="pre">pycutlass</span></code> will not be maintained moving forward.</p>
</section>
</section>
</section>
<section id="current-functionality">
<h2>Current functionality<a class="headerlink" href="#current-functionality" title="Permalink to this heading">#</a></h2>
<p>The CUTLASS Python interface currently supports the following operations:</p>
<ul class="simple">
<li><p>GEMMs</p></li>
<li><p>GEMMs with fused elementwise epilogues (e.g., ReLU) (for pre-SM90 kernels)</p></li>
<li><p>Stream K swizzling (for pre-SM90 kernels)</p></li>
<li><p>Grouped GEMM (for pre-SM90 kernels)</p></li>
</ul>
</section>
<section id="getting-started">
<h2>Getting started<a class="headerlink" href="#getting-started" title="Permalink to this heading">#</a></h2>
<p>We recommend using the CUTLASS Python interface via one of the Docker images located in the <a href="#id1"><span class="problematic" id="id2">docker</span></a> directory.</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>docker<span class="w"> </span>build<span class="w"> </span>-t<span class="w"> </span>cutlass-cuda12.1:latest<span class="w"> </span>-f<span class="w"> </span>docker/Dockerfile-cuda12.1-pytorch<span class="w"> </span>.
docker<span class="w"> </span>run<span class="w"> </span>--gpus<span class="w"> </span>all<span class="w"> </span>-it<span class="w"> </span>--rm<span class="w"> </span>cutlass-cuda12.1:latest
</pre></div>
</div>
<p>The CUTLASS Python interface has been tested with CUDA 11.8, 12.0, and 12.1 on Python 3.8.10 and 3.9.7.</p>
<section id="optional-environment-variables">
<h3>Optional environment variables<a class="headerlink" href="#optional-environment-variables" title="Permalink to this heading">#</a></h3>
<p>Prior to installing the CUTLASS Python interface, one may optionally set the following environment variables:</p>
<ul class="simple">
<li><p><code class="docutils literal notranslate"><span class="pre">CUTLASS_PATH</span></code>: the path to the cloned CUTLASS repository</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">CUDA_INSTALL_PATH</span></code>: the path to the installation of CUDA</p></li>
</ul>
<p>If these environment variables are not set, the installation process will infer them to be the following:</p>
<ul class="simple">
<li><p><code class="docutils literal notranslate"><span class="pre">CUTLASS_PATH</span></code>: one directory level above the current directory (i.e., <code class="docutils literal notranslate"><span class="pre">$(pwd)/..</span></code>)</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">CUDA_INSTALL_PATH</span></code>: the directory holding <code class="docutils literal notranslate"><span class="pre">/bin/nvcc</span></code> for the first version of <code class="docutils literal notranslate"><span class="pre">nvcc</span></code> on <code class="docutils literal notranslate"><span class="pre">$PATH</span></code> (i.e., <code class="docutils literal notranslate"><span class="pre">which</span> <span class="pre">nvcc</span> <span class="pre">|</span> <span class="pre">awk</span> <span class="pre">-F'/bin/nvcc'</span> <span class="pre">'{print</span> <span class="pre">$1}'</span></code>)</p></li>
</ul>
<p><strong>NOTE:</strong> The version of <code class="docutils literal notranslate"><span class="pre">cuda-python</span></code> installed must match the CUDA version in <code class="docutils literal notranslate"><span class="pre">CUDA_INSTALL_PATH</span></code>.</p>
</section>
<section id="installation">
<h3>Installation<a class="headerlink" href="#installation" title="Permalink to this heading">#</a></h3>
<p>The CUTLASS Python interface can currently be installed via:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>python<span class="w"> </span>setup.py<span class="w"> </span>develop<span class="w"> </span>--user
</pre></div>
</div>
<p>This will allow changes to the Python interface source to be reflected when using the Python interface.</p>
<p>We plan to add support for installing via <code class="docutils literal notranslate"><span class="pre">python</span> <span class="pre">setup.py</span> <span class="pre">install</span></code> in a future release.</p>
</section>
</section>
<section id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this heading">#</a></h2>
<p>Jupyter notebook examples of using the CUTLASS Python interface are located in <a href="#id3"><span class="problematic" id="id4">examples/python</span></a>.</p>
<p>To launch these notebooks from this directory, run:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>jupyter-lab<span class="w"> </span>../examples/python
</pre></div>
</div>
</section>
<section id="building-documentation">
<h2>Building documentation<a class="headerlink" href="#building-documentation" title="Permalink to this heading">#</a></h2>
<p>The CUTLASS Python interface uses <a class="reference external" href="https://www.sphinx-doc.org/en/master/">Sphinx</a> for documentation.</p>
<p>Building the documentation requires additional packages. These can be installed via:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>apt-get<span class="w"> </span>install<span class="w"> </span>pandoc
pip<span class="w"> </span>install<span class="w"> </span>--upgrade<span class="w"> </span>Sphinx<span class="w"> </span>furo<span class="w"> </span>pandoc<span class="w"> </span>myst-parser<span class="w"> </span>sphinx-copybutton<span class="w"> </span>nbsphinx<span class="w"> </span>nbsphinx-link<span class="w"> </span>sphinx-inline-tabs
</pre></div>
</div>
<p>To build documentation, you must first have installed the CUTLASS Python interface via the
<a class="reference internal" href="install.html#installation"><span class="std std-ref">installation instructions</span></a>.</p>
<p>Documentation can then be built via the following commands:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sphinx-apidoc<span class="w"> </span>-o<span class="w"> </span>docs_src/source/<span class="w"> </span>cutlass/<span class="w"> </span>cutlass/backend*
<span class="nb">cd</span><span class="w"> </span>docs_src
make<span class="w"> </span>html
mv<span class="w"> </span>_build/*<span class="w"> </span>../docs
</pre></div>
</div>
</section>
</section>
<section id="copyright">
<h1>Copyright<a class="headerlink" href="#copyright" title="Permalink to this heading">#</a></h1>
<p>Copyright (c) 2023 - 2023 NVIDIA CORPORATION &amp; AFFILIATES. All rights reserved.
SPDX-License-Identifier: BSD-3-Clause</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>  <span class="n">Redistribution</span> <span class="ow">and</span> <span class="n">use</span> <span class="ow">in</span> <span class="n">source</span> <span class="ow">and</span> <span class="n">binary</span> <span class="n">forms</span><span class="p">,</span> <span class="k">with</span> <span class="ow">or</span> <span class="n">without</span>
  <span class="n">modification</span><span class="p">,</span> <span class="n">are</span> <span class="n">permitted</span> <span class="n">provided</span> <span class="n">that</span> <span class="n">the</span> <span class="n">following</span> <span class="n">conditions</span> <span class="n">are</span> <span class="n">met</span><span class="p">:</span>

  <span class="mf">1.</span> <span class="n">Redistributions</span> <span class="n">of</span> <span class="n">source</span> <span class="n">code</span> <span class="n">must</span> <span class="n">retain</span> <span class="n">the</span> <span class="n">above</span> <span class="n">copyright</span> <span class="n">notice</span><span class="p">,</span> <span class="n">this</span>
  <span class="nb">list</span> <span class="n">of</span> <span class="n">conditions</span> <span class="ow">and</span> <span class="n">the</span> <span class="n">following</span> <span class="n">disclaimer</span><span class="o">.</span>

  <span class="mf">2.</span> <span class="n">Redistributions</span> <span class="ow">in</span> <span class="n">binary</span> <span class="n">form</span> <span class="n">must</span> <span class="n">reproduce</span> <span class="n">the</span> <span class="n">above</span> <span class="n">copyright</span> <span class="n">notice</span><span class="p">,</span>
  <span class="n">this</span> <span class="nb">list</span> <span class="n">of</span> <span class="n">conditions</span> <span class="ow">and</span> <span class="n">the</span> <span class="n">following</span> <span class="n">disclaimer</span> <span class="ow">in</span> <span class="n">the</span> <span class="n">documentation</span>
  <span class="ow">and</span><span class="o">/</span><span class="ow">or</span> <span class="n">other</span> <span class="n">materials</span> <span class="n">provided</span> <span class="k">with</span> <span class="n">the</span> <span class="n">distribution</span><span class="o">.</span>

  <span class="mf">3.</span> <span class="n">Neither</span> <span class="n">the</span> <span class="n">name</span> <span class="n">of</span> <span class="n">the</span> <span class="n">copyright</span> <span class="n">holder</span> <span class="n">nor</span> <span class="n">the</span> <span class="n">names</span> <span class="n">of</span> <span class="n">its</span>
  <span class="n">contributors</span> <span class="n">may</span> <span class="n">be</span> <span class="n">used</span> <span class="n">to</span> <span class="n">endorse</span> <span class="ow">or</span> <span class="n">promote</span> <span class="n">products</span> <span class="n">derived</span> <span class="kn">from</span>
  <span class="nn">this</span> <span class="n">software</span> <span class="n">without</span> <span class="n">specific</span> <span class="n">prior</span> <span class="n">written</span> <span class="n">permission</span><span class="o">.</span>

  <span class="n">THIS</span> <span class="n">SOFTWARE</span> <span class="n">IS</span> <span class="n">PROVIDED</span> <span class="n">BY</span> <span class="n">THE</span> <span class="n">COPYRIGHT</span> <span class="n">HOLDERS</span> <span class="n">AND</span> <span class="n">CONTRIBUTORS</span> <span class="s2">&quot;AS IS&quot;</span>
  <span class="n">AND</span> <span class="n">ANY</span> <span class="n">EXPRESS</span> <span class="n">OR</span> <span class="n">IMPLIED</span> <span class="n">WARRANTIES</span><span class="p">,</span> <span class="n">INCLUDING</span><span class="p">,</span> <span class="n">BUT</span> <span class="n">NOT</span> <span class="n">LIMITED</span> <span class="n">TO</span><span class="p">,</span> <span class="n">THE</span>
  <span class="n">IMPLIED</span> <span class="n">WARRANTIES</span> <span class="n">OF</span> <span class="n">MERCHANTABILITY</span> <span class="n">AND</span> <span class="n">FITNESS</span> <span class="n">FOR</span> <span class="n">A</span> <span class="n">PARTICULAR</span> <span class="n">PURPOSE</span> <span class="n">ARE</span>
  <span class="n">DISCLAIMED</span><span class="o">.</span> <span class="n">IN</span> <span class="n">NO</span> <span class="n">EVENT</span> <span class="n">SHALL</span> <span class="n">THE</span> <span class="n">COPYRIGHT</span> <span class="n">HOLDER</span> <span class="n">OR</span> <span class="n">CONTRIBUTORS</span> <span class="n">BE</span> <span class="n">LIABLE</span>
  <span class="n">FOR</span> <span class="n">ANY</span> <span class="n">DIRECT</span><span class="p">,</span> <span class="n">INDIRECT</span><span class="p">,</span> <span class="n">INCIDENTAL</span><span class="p">,</span> <span class="n">SPECIAL</span><span class="p">,</span> <span class="n">EXEMPLARY</span><span class="p">,</span> <span class="n">OR</span> <span class="n">CONSEQUENTIAL</span>
  <span class="n">DAMAGES</span> <span class="p">(</span><span class="n">INCLUDING</span><span class="p">,</span> <span class="n">BUT</span> <span class="n">NOT</span> <span class="n">LIMITED</span> <span class="n">TO</span><span class="p">,</span> <span class="n">PROCUREMENT</span> <span class="n">OF</span> <span class="n">SUBSTITUTE</span> <span class="n">GOODS</span> <span class="n">OR</span>
  <span class="n">SERVICES</span><span class="p">;</span> <span class="n">LOSS</span> <span class="n">OF</span> <span class="n">USE</span><span class="p">,</span> <span class="n">DATA</span><span class="p">,</span> <span class="n">OR</span> <span class="n">PROFITS</span><span class="p">;</span> <span class="n">OR</span> <span class="n">BUSINESS</span> <span class="n">INTERRUPTION</span><span class="p">)</span> <span class="n">HOWEVER</span>
  <span class="n">CAUSED</span> <span class="n">AND</span> <span class="n">ON</span> <span class="n">ANY</span> <span class="n">THEORY</span> <span class="n">OF</span> <span class="n">LIABILITY</span><span class="p">,</span> <span class="n">WHETHER</span> <span class="n">IN</span> <span class="n">CONTRACT</span><span class="p">,</span> <span class="n">STRICT</span> <span class="n">LIABILITY</span><span class="p">,</span>
  <span class="n">OR</span> <span class="n">TORT</span> <span class="p">(</span><span class="n">INCLUDING</span> <span class="n">NEGLIGENCE</span> <span class="n">OR</span> <span class="n">OTHERWISE</span><span class="p">)</span> <span class="n">ARISING</span> <span class="n">IN</span> <span class="n">ANY</span> <span class="n">WAY</span> <span class="n">OUT</span> <span class="n">OF</span> <span class="n">THE</span> <span class="n">USE</span>
  <span class="n">OF</span> <span class="n">THIS</span> <span class="n">SOFTWARE</span><span class="p">,</span> <span class="n">EVEN</span> <span class="n">IF</span> <span class="n">ADVISED</span> <span class="n">OF</span> <span class="n">THE</span> <span class="n">POSSIBILITY</span> <span class="n">OF</span> <span class="n">SUCH</span> <span class="n">DAMAGE</span><span class="o">.</span>
</pre></div>
</div>
</section>
<div class="toctree-wrapper compound">
</div>
<div class="toctree-wrapper compound">
</div>
<div class="toctree-wrapper compound">
</div>
<div class="toctree-wrapper compound">
</div>
<div class="toctree-wrapper compound">
</div>
<div class="toctree-wrapper compound">
</div>
<div class="toctree-wrapper compound">
</div>
<section id="indices-and-tables">
<h1>Indices and tables<a class="headerlink" href="#indices-and-tables" title="Permalink to this heading">#</a></h1>
<ul class="simple">
<li><p><a class="reference internal" href="genindex.html"><span class="std std-ref">Index</span></a></p></li>
<li><p><a class="reference internal" href="py-modindex.html"><span class="std std-ref">Module Index</span></a></p></li>
<li><p><a class="reference internal" href="search.html"><span class="std std-ref">Search Page</span></a></p></li>
</ul>
</section>

        </article>
      </div>
      <footer>
        
        <div class="related-pages">
          <a class="next-page" href="install.html">
              <div class="page-info">
                <div class="context">
                  <span>Next</span>
                </div>
                <div class="title">Installation</div>
              </div>
              <svg class="furo-related-icon"><use href="#svg-arrow-right"></use></svg>
            </a>
          
        </div>
        <div class="bottom-of-page">
          <div class="left-details">
            <div class="copyright">
                Copyright &#169; 2023, NVIDIA
            </div>
            Made with <a href="https://www.sphinx-doc.org/">Sphinx</a> and <a class="muted-link" href="https://pradyunsg.me">@pradyunsg</a>'s
            
            <a href="https://github.com/pradyunsg/furo">Furo</a>
            
          </div>
          <div class="right-details">
            <div class="icons">
              <a class="muted-link " href="https://github.com/NVIDIA/cutlass" aria-label="GitHub">
                <svg stroke="currentColor" fill="currentColor" stroke-width="0" viewBox="0 0 16 16">
                    <path fill-rule="evenodd" d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.013 8.013 0 0 0 16 8c0-4.42-3.58-8-8-8z"></path>
                </svg>
            </a>
              
            </div>
          </div>
        </div>
        
      </footer>
    </div>
    <aside class="toc-drawer">
      
      
      <div class="toc-sticky toc-scroll">
        <div class="toc-title-container">
          <span class="toc-title">
            On this page
          </span>
        </div>
        <div class="toc-tree-container">
          <div class="toc-tree">
            <ul>
<li><a class="reference internal" href="#">CUTLASS Python Interface</a><ul>
<li><a class="reference internal" href="#overview">Overview</a><ul>
<li><a class="reference internal" href="#non-goals">Non-goals</a></li>
<li><a class="reference internal" href="#comparison-to-pycutlass">Comparison to PyCUTLASS</a><ul>
<li><a class="reference internal" href="#transitioning-from-pycutlass">Transitioning from PyCUTLASS</a></li>
</ul>
</li>
</ul>
</li>
<li><a class="reference internal" href="#current-functionality">Current functionality</a></li>
<li><a class="reference internal" href="#getting-started">Getting started</a><ul>
<li><a class="reference internal" href="#optional-environment-variables">Optional environment variables</a></li>
<li><a class="reference internal" href="#installation">Installation</a></li>
</ul>
</li>
<li><a class="reference internal" href="#examples">Examples</a></li>
<li><a class="reference internal" href="#building-documentation">Building documentation</a></li>
</ul>
</li>
<li><a class="reference internal" href="#copyright">Copyright</a></li>
<li><a class="reference internal" href="#indices-and-tables">Indices and tables</a></li>
</ul>

          </div>
        </div>
      </div>
      
      
    </aside>
  </div>
</div><script data-url_root="./" id="documentation_options" src="_static/documentation_options.js"></script>
    <script src="_static/doctools.js"></script>
    <script src="_static/sphinx_highlight.js"></script>
    <script src="_static/scripts/furo.js"></script>
    <script src="_static/clipboard.min.js"></script>
    <script src="_static/copybutton.js"></script>
    <script src="_static/tabs.js"></script>
    <script crossorigin="anonymous" integrity="sha256-Ae2Vz/4ePdIu6ZyI/5ZGsYnb+m0JlOmKPjt6XZ9JJkA=" src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.4/require.min.js"></script>
    </body>
</html>