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<h1>Source code for torch.cuda.nvtx</h1><div class="highlight"><pre>
<span></span><span class="c1"># mypy: allow-untyped-defs</span>
<span class="sa">r</span><span class="sd">"""This package adds support for NVIDIA Tools Extension (NVTX) used in profiling."""</span>
<span class="kn">from</span> <span class="nn">contextlib</span> <span class="kn">import</span> <span class="n">contextmanager</span>
<span class="k">try</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">torch._C</span> <span class="kn">import</span> <span class="n">_nvtx</span>
<span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
<span class="k">class</span> <span class="nc">_NVTXStub</span><span class="p">:</span>
<span class="nd">@staticmethod</span>
<span class="k">def</span> <span class="nf">_fail</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span>
<span class="s2">"NVTX functions not installed. Are you sure you have a CUDA build?"</span>
<span class="p">)</span>
<span class="n">rangePushA</span> <span class="o">=</span> <span class="n">_fail</span>
<span class="n">rangePop</span> <span class="o">=</span> <span class="n">_fail</span>
<span class="n">markA</span> <span class="o">=</span> <span class="n">_fail</span>
<span class="n">_nvtx</span> <span class="o">=</span> <span class="n">_NVTXStub</span><span class="p">()</span> <span class="c1"># type: ignore[assignment]</span>
<span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"range_push"</span><span class="p">,</span> <span class="s2">"range_pop"</span><span class="p">,</span> <span class="s2">"range_start"</span><span class="p">,</span> <span class="s2">"range_end"</span><span class="p">,</span> <span class="s2">"mark"</span><span class="p">,</span> <span class="s2">"range"</span><span class="p">]</span>
<div class="viewcode-block" id="range_push"><a class="viewcode-back" href="../../../generated/torch.cuda.nvtx.range_push.html#torch.cuda.nvtx.range_push">[docs]</a><span class="k">def</span> <span class="nf">range_push</span><span class="p">(</span><span class="n">msg</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""</span>
<span class="sd"> Push a range onto a stack of nested range span. Returns zero-based depth of the range that is started.</span>
<span class="sd"> Args:</span>
<span class="sd"> msg (str): ASCII message to associate with range</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">_nvtx</span><span class="o">.</span><span class="n">rangePushA</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span></div>
<div class="viewcode-block" id="range_pop"><a class="viewcode-back" href="../../../generated/torch.cuda.nvtx.range_pop.html#torch.cuda.nvtx.range_pop">[docs]</a><span class="k">def</span> <span class="nf">range_pop</span><span class="p">():</span>
<span class="w"> </span><span class="sd">"""Pop a range off of a stack of nested range spans. Returns the zero-based depth of the range that is ended."""</span>
<span class="k">return</span> <span class="n">_nvtx</span><span class="o">.</span><span class="n">rangePop</span><span class="p">()</span></div>
<span class="k">def</span> <span class="nf">range_start</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span>
<span class="w"> </span><span class="sd">"""</span>
<span class="sd"> Mark the start of a range with string message. It returns an unique handle</span>
<span class="sd"> for this range to pass to the corresponding call to rangeEnd().</span>
<span class="sd"> A key difference between this and range_push/range_pop is that the</span>
<span class="sd"> range_start/range_end version supports range across threads (start on one</span>
<span class="sd"> thread and end on another thread).</span>
<span class="sd"> Returns: A range handle (uint64_t) that can be passed to range_end().</span>
<span class="sd"> Args:</span>
<span class="sd"> msg (str): ASCII message to associate with the range.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">_nvtx</span><span class="o">.</span><span class="n">rangeStartA</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">range_end</span><span class="p">(</span><span class="n">range_id</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
<span class="w"> </span><span class="sd">"""</span>
<span class="sd"> Mark the end of a range for a given range_id.</span>
<span class="sd"> Args:</span>
<span class="sd"> range_id (int): an unique handle for the start range.</span>
<span class="sd"> """</span>
<span class="n">_nvtx</span><span class="o">.</span><span class="n">rangeEnd</span><span class="p">(</span><span class="n">range_id</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_device_range_start</span><span class="p">(</span><span class="n">msg</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">stream</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">0</span><span class="p">)</span> <span class="o">-></span> <span class="nb">object</span><span class="p">:</span>
<span class="w"> </span><span class="sd">"""</span>
<span class="sd"> Marks the start of a range with string message.</span>
<span class="sd"> It returns an opaque heap-allocated handle for this range</span>
<span class="sd"> to pass to the corresponding call to device_range_end().</span>
<span class="sd"> A key difference between this and range_start is that the</span>
<span class="sd"> range_start marks the range right away, while _device_range_start</span>
<span class="sd"> marks the start of the range as soon as all the tasks on the</span>
<span class="sd"> CUDA stream are completed.</span>
<span class="sd"> Returns: An opaque heap-allocated handle that should be passed to _device_range_end().</span>
<span class="sd"> Args:</span>
<span class="sd"> msg (str): ASCII message to associate with the range.</span>
<span class="sd"> stream (int): CUDA stream id.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">_nvtx</span><span class="o">.</span><span class="n">deviceRangeStart</span><span class="p">(</span><span class="n">msg</span><span class="p">,</span> <span class="n">stream</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_device_range_end</span><span class="p">(</span><span class="n">range_handle</span><span class="p">:</span> <span class="nb">object</span><span class="p">,</span> <span class="n">stream</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">0</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
<span class="w"> </span><span class="sd">"""</span>
<span class="sd"> Mark the end of a range for a given range_handle as soon as all the tasks</span>
<span class="sd"> on the CUDA stream are completed.</span>
<span class="sd"> Args:</span>
<span class="sd"> range_handle: an unique handle for the start range.</span>
<span class="sd"> stream (int): CUDA stream id.</span>
<span class="sd"> """</span>
<span class="n">_nvtx</span><span class="o">.</span><span class="n">deviceRangeEnd</span><span class="p">(</span><span class="n">range_handle</span><span class="p">,</span> <span class="n">stream</span><span class="p">)</span>
<div class="viewcode-block" id="mark"><a class="viewcode-back" href="../../../generated/torch.cuda.nvtx.mark.html#torch.cuda.nvtx.mark">[docs]</a><span class="k">def</span> <span class="nf">mark</span><span class="p">(</span><span class="n">msg</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""</span>
<span class="sd"> Describe an instantaneous event that occurred at some point.</span>
<span class="sd"> Args:</span>
<span class="sd"> msg (str): ASCII message to associate with the event.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">_nvtx</span><span class="o">.</span><span class="n">markA</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span></div>
<div class="viewcode-block" id="range"><a class="viewcode-back" href="../../../generated/torch.cuda.nvtx.range.html#torch.cuda.nvtx.range">[docs]</a><span class="nd">@contextmanager</span>
<span class="k">def</span> <span class="nf">range</span><span class="p">(</span><span class="n">msg</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""</span>
<span class="sd"> Context manager / decorator that pushes an NVTX range at the beginning</span>
<span class="sd"> of its scope, and pops it at the end. If extra arguments are given,</span>
<span class="sd"> they are passed as arguments to msg.format().</span>
<span class="sd"> Args:</span>
<span class="sd"> msg (str): message to associate with the range</span>
<span class="sd"> """</span>
<span class="n">range_push</span><span class="p">(</span><span class="n">msg</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</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">range_pop</span><span class="p">()</span></div>
</pre></div>
</article>
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