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<div class="section" id="triton-autotune">
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<h1>triton.autotune<a class="headerlink" href="#triton-autotune" title="Permalink to this headline">¶</a></h1>
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<dl class="py function">
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<dt class="sig sig-object py" id="triton.autotune">
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<span class="sig-prename descclassname"><span class="pre">triton.</span></span><span class="sig-name descname"><span class="pre">autotune</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">configs</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">key</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">reset_to_zero</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#triton.autotune" title="Permalink to this definition">¶</a></dt>
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<dd><p>Decorator for auto-tuning a <code class="code docutils literal notranslate"><span class="pre">triton.jit</span></code>’d function.</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="nd">@triton</span><span class="o">.</span><span class="n">autotune</span><span class="p">(</span><span class="n">configs</span><span class="o">=</span><span class="p">[</span>
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<span class="n">triton</span><span class="o">.</span><span class="n">Config</span><span class="p">(</span><span class="n">meta</span><span class="o">=</span><span class="p">{</span><span class="s1">'BLOCK_SIZE'</span><span class="p">:</span> <span class="mi">128</span><span class="p">},</span> <span class="n">num_warps</span><span class="o">=</span><span class="mi">4</span><span class="p">),</span>
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<span class="n">triton</span><span class="o">.</span><span class="n">Config</span><span class="p">(</span><span class="n">meta</span><span class="o">=</span><span class="p">{</span><span class="s1">'BLOCK_SIZE'</span><span class="p">:</span> <span class="mi">1024</span><span class="p">},</span> <span class="n">num_warps</span><span class="o">=</span><span class="mi">8</span><span class="p">),</span>
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<span class="p">],</span>
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<span class="n">key</span><span class="o">=</span><span class="p">[</span><span class="s1">'x_size'</span><span class="p">]</span> <span class="c1"># the two above configs will be evaluated anytime</span>
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<span class="c1"># the value of x_size changes</span>
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<span class="p">)</span>
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<span class="nd">@triton</span><span class="o">.</span><span class="n">jit</span>
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<span class="k">def</span> <span class="nf">kernel</span><span class="p">(</span><span class="n">x_ptr</span><span class="p">,</span> <span class="n">x_size</span><span class="p">,</span> <span class="o">**</span><span class="n">META</span><span class="p">):</span>
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<span class="n">BLOCK_SIZE</span> <span class="o">=</span> <span class="n">META</span><span class="p">[</span><span class="s1">'BLOCK_SIZE'</span><span class="p">]</span>
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</pre></div>
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</div>
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<dl class="field-list simple">
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<dt class="field-odd">Note</dt>
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<dd class="field-odd"><p>When all the configurations are evaluated, the kernel will run multiple time.
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This means that whatever value the kernel updates will be updated multiple times.
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To avoid this undesired behavior, you can use the <cite>reset_to_zero</cite> argument, which
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reset the value of the provided tensor to <cite>zero</cite> before running any configuration.</p>
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</dd>
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<dt class="field-even">Parameters</dt>
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<dd class="field-even"><ul class="simple">
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<li><p><strong>configs</strong> (<em>list</em><em>[</em><a class="reference internal" href="triton.Config.html#triton.Config" title="triton.Config"><em>triton.Config</em></a><em>]</em>) – a list of <code class="code docutils literal notranslate"><span class="pre">triton.Config</span></code> objects</p></li>
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<li><p><strong>key</strong> (<em>list</em><em>[</em><em>str</em><em>]</em>) – a list of argument names whose change in value will trigger the evaluation of all provided configs.</p></li>
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<li><p><strong>reset_to_zero</strong> (<em>list</em><em>[</em><em>str</em><em>]</em>) – a list of argument names whose value will be reset to zero before evaluating any configs.</p></li>
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