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<h1>Source code for torch.backends.mps</h1><div class="highlight"><pre>
<span></span><span class="kn">import</span> <span class="nn">torch</span>
<span class="kn">from</span> <span class="nn">functools</span> <span class="kn">import</span> <span class="n">lru_cache</span> <span class="k">as</span> <span class="n">_lru_cache</span>
<span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"is_built"</span><span class="p">,</span> <span class="s2">"is_available"</span><span class="p">,</span> <span class="s2">"is_macos13_or_newer"</span><span class="p">]</span>
<div class="viewcode-block" id="is_built"><a class="viewcode-back" href="../../../backends.html#torch.backends.mps.is_built">[docs]</a><span class="k">def</span> <span class="nf">is_built</span><span class="p">()</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Returns whether PyTorch is built with MPS support. Note that this</span>
<span class="sd"> doesn't necessarily mean MPS is available; just that if this PyTorch</span>
<span class="sd"> binary were run a machine with working MPS drivers and devices, we</span>
<span class="sd"> would be able to use it."""</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">has_mps</span></div>
<div class="viewcode-block" id="is_available"><a class="viewcode-back" href="../../../backends.html#torch.backends.mps.is_available">[docs]</a><span class="nd">@_lru_cache</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">is_available</span><span class="p">()</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Returns a bool indicating if MPS is currently available."""</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">_mps_is_available</span><span class="p">()</span></div>
<span class="nd">@_lru_cache</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">is_macos13_or_newer</span><span class="p">()</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
<span class="sa">r</span><span class="sd">"""Returns a bool indicating whether MPS is running on MacOS 13 or newer."""</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">_mps_is_on_macos_13_or_newer</span><span class="p">()</span>
<span class="c1"># Register prims as implementation of var_mean and group_norm</span>
<span class="k">if</span> <span class="n">is_built</span><span class="p">():</span>
<span class="kn">from</span> <span class="nn">...library</span> <span class="kn">import</span> <span class="n">Library</span> <span class="k">as</span> <span class="n">_Library</span>
<span class="kn">from</span> <span class="nn">..._refs</span> <span class="kn">import</span> <span class="n">var_mean</span> <span class="k">as</span> <span class="n">_var_mean</span><span class="p">,</span> <span class="n">native_group_norm</span> <span class="k">as</span> <span class="n">_native_group_norm</span>
<span class="kn">from</span> <span class="nn">..._decomp.decompositions</span> <span class="kn">import</span> <span class="n">native_group_norm_backward</span> <span class="k">as</span> <span class="n">_native_group_norm_backward</span>
<span class="n">_lib</span> <span class="o">=</span> <span class="n">_Library</span><span class="p">(</span><span class="s2">"aten"</span><span class="p">,</span> <span class="s2">"IMPL"</span><span class="p">)</span>
<span class="n">_lib</span><span class="o">.</span><span class="n">impl</span><span class="p">(</span><span class="s2">"var_mean.correction"</span><span class="p">,</span> <span class="n">_var_mean</span><span class="p">,</span> <span class="s2">"MPS"</span><span class="p">)</span>
<span class="n">_lib</span><span class="o">.</span><span class="n">impl</span><span class="p">(</span><span class="s2">"native_group_norm"</span><span class="p">,</span> <span class="n">_native_group_norm</span><span class="p">,</span> <span class="s2">"MPS"</span><span class="p">)</span>
<span class="n">_lib</span><span class="o">.</span><span class="n">impl</span><span class="p">(</span><span class="s2">"native_group_norm_backward"</span><span class="p">,</span> <span class="n">_native_group_norm_backward</span><span class="p">,</span> <span class="s2">"MPS"</span><span class="p">)</span>
</pre></div>
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