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   <h1>Source code for apache_beam.utils.profiler</h1><div class="highlight"><pre>
 <span></span><span class="c1">#</span>
 <span class="c1"># Licensed to the Apache Software Foundation (ASF) under one or more</span>
 <span class="c1"># contributor license agreements.  See the NOTICE file distributed with</span>
 <span class="c1"># this work for additional information regarding copyright ownership.</span>
 <span class="c1"># The ASF licenses this file to You under the Apache License, Version 2.0</span>
 <span class="c1"># (the &quot;License&quot;); you may not use this file except in compliance with</span>
 <span class="c1"># the License.  You may obtain a copy of the License at</span>
 <span class="c1">#</span>
 <span class="c1">#    http://www.apache.org/licenses/LICENSE-2.0</span>
 <span class="c1">#</span>
 <span class="c1"># Unless required by applicable law or agreed to in writing, software</span>
 <span class="c1"># distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span>
 <span class="c1"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
 <span class="c1"># See the License for the specific language governing permissions and</span>
 <span class="c1"># limitations under the License.</span>
 <span class="c1">#</span>

 <span class="sd">&quot;&quot;&quot;A profiler context manager based on cProfile.Profile and guppy.hpy objects.</span>

 <span class="sd">For internal use only; no backwards-compatibility guarantees.</span>
 <span class="sd">&quot;&quot;&quot;</span>

 <span class="c1"># pytype: skip-file</span>
 <span class="c1"># mypy: check-untyped-defs</span>

 <span class="kn">import</span> <span class="nn">cProfile</span>
 <span class="kn">import</span> <span class="nn">io</span>
 <span class="kn">import</span> <span class="nn">logging</span>
 <span class="kn">import</span> <span class="nn">os</span>
 <span class="kn">import</span> <span class="nn">pstats</span>
 <span class="kn">import</span> <span class="nn">random</span>
 <span class="kn">import</span> <span class="nn">tempfile</span>
 <span class="kn">import</span> <span class="nn">time</span>
 <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Callable</span>
 <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Optional</span>

 <span class="kn">from</span> <span class="nn">apache_beam.io</span> <span class="kn">import</span> <span class="n">filesystems</span>

 <span class="n">_LOGGER</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="vm">__name__</span><span class="p">)</span>


 <div class="viewcode-block" id="Profile"><a class="viewcode-back" href="../../../apache_beam.utils.profiler.html#apache_beam.utils.profiler.Profile">[docs]</a><span class="k">class</span> <span class="nc">Profile</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
   <span class="sd">&quot;&quot;&quot;cProfile and Heapy wrapper context for saving and logging profiler</span>
 <span class="sd">  results.&quot;&quot;&quot;</span>

   <span class="n">SORTBY</span> <span class="o">=</span> <span class="s1">&#39;cumulative&#39;</span>

   <span class="n">profile_output</span> <span class="o">=</span> <span class="kc">None</span>  <span class="c1"># type: str</span>
   <span class="n">stats</span> <span class="o">=</span> <span class="kc">None</span>  <span class="c1"># type: pstats.Stats</span>

   <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span>
       <span class="bp">self</span><span class="p">,</span>
       <span class="n">profile_id</span><span class="p">,</span> <span class="c1"># type: str</span>
       <span class="n">profile_location</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="c1"># type: Optional[str]</span>
       <span class="n">log_results</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="c1"># type: bool</span>
       <span class="n">file_copy_fn</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="c1"># type: Optional[Callable[[str, str], None]]</span>
       <span class="n">time_prefix</span><span class="o">=</span><span class="s1">&#39;%Y-%m-</span><span class="si">%d</span><span class="s1">_%H_%M_%S-&#39;</span><span class="p">,</span> <span class="c1"># type: str</span>
       <span class="n">enable_cpu_profiling</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="c1"># type: bool</span>
       <span class="n">enable_memory_profiling</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="c1"># type: bool</span>
   <span class="p">):</span>
     <span class="sd">&quot;&quot;&quot;Creates a Profile object.</span>

 <span class="sd">    Args:</span>
 <span class="sd">      profile_id: Unique id of the profiling session.</span>
 <span class="sd">      profile_location: The file location where the profiling results will be</span>
 <span class="sd">        stored.</span>
 <span class="sd">      log_results: Log the result to console if true.</span>
 <span class="sd">      file_copy_fn: Lambda function for copying files.</span>
 <span class="sd">      time_prefix: Format of the timestamp prefix in profiling result files.</span>
 <span class="sd">      enable_cpu_profiling: CPU profiler will be enabled during the profiling</span>
 <span class="sd">        session.</span>
 <span class="sd">      enable_memory_profiling: Memory profiler will be enabled during the</span>
 <span class="sd">        profiling session, the profiler only records the newly allocated objects</span>
 <span class="sd">        in this session.</span>
 <span class="sd">    &quot;&quot;&quot;</span>
     <span class="bp">self</span><span class="o">.</span><span class="n">profile_id</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">profile_id</span><span class="p">)</span>
     <span class="bp">self</span><span class="o">.</span><span class="n">profile_location</span> <span class="o">=</span> <span class="n">profile_location</span>
     <span class="bp">self</span><span class="o">.</span><span class="n">log_results</span> <span class="o">=</span> <span class="n">log_results</span>
     <span class="bp">self</span><span class="o">.</span><span class="n">file_copy_fn</span> <span class="o">=</span> <span class="n">file_copy_fn</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">default_file_copy_fn</span>
     <span class="bp">self</span><span class="o">.</span><span class="n">time_prefix</span> <span class="o">=</span> <span class="n">time_prefix</span>
     <span class="bp">self</span><span class="o">.</span><span class="n">enable_cpu_profiling</span> <span class="o">=</span> <span class="n">enable_cpu_profiling</span>
     <span class="bp">self</span><span class="o">.</span><span class="n">enable_memory_profiling</span> <span class="o">=</span> <span class="n">enable_memory_profiling</span>

   <span class="k">def</span> <span class="fm">__enter__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
     <span class="n">_LOGGER</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">&#39;Start profiling: </span><span class="si">%s</span><span class="s1">&#39;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">profile_id</span><span class="p">)</span>
     <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">enable_cpu_profiling</span><span class="p">:</span>
       <span class="bp">self</span><span class="o">.</span><span class="n">profile</span> <span class="o">=</span> <span class="n">cProfile</span><span class="o">.</span><span class="n">Profile</span><span class="p">()</span>
       <span class="bp">self</span><span class="o">.</span><span class="n">profile</span><span class="o">.</span><span class="n">enable</span><span class="p">()</span>
     <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">enable_memory_profiling</span><span class="p">:</span>
       <span class="k">try</span><span class="p">:</span>
         <span class="kn">from</span> <span class="nn">guppy</span> <span class="kn">import</span> <span class="n">hpy</span>
         <span class="bp">self</span><span class="o">.</span><span class="n">hpy</span> <span class="o">=</span> <span class="n">hpy</span><span class="p">()</span>
         <span class="bp">self</span><span class="o">.</span><span class="n">hpy</span><span class="o">.</span><span class="n">setrelheap</span><span class="p">()</span>
       <span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
         <span class="n">_LOGGER</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">&quot;Unable to import guppy for memory profiling&quot;</span><span class="p">)</span>
         <span class="bp">self</span><span class="o">.</span><span class="n">hpy</span> <span class="o">=</span> <span class="kc">None</span>
     <span class="k">return</span> <span class="bp">self</span>

   <span class="k">def</span> <span class="fm">__exit__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span>
     <span class="n">_LOGGER</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">&#39;Stop profiling: </span><span class="si">%s</span><span class="s1">&#39;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">profile_id</span><span class="p">)</span>

     <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">profile_location</span><span class="p">:</span>
       <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">enable_cpu_profiling</span><span class="p">:</span>
         <span class="bp">self</span><span class="o">.</span><span class="n">profile</span><span class="o">.</span><span class="n">create_stats</span><span class="p">()</span>
         <span class="bp">self</span><span class="o">.</span><span class="n">profile_output</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_upload_profile_data</span><span class="p">(</span>
             <span class="c1"># typing: seems stats attr is missing from typeshed</span>
             <span class="bp">self</span><span class="o">.</span><span class="n">profile_location</span><span class="p">,</span> <span class="s1">&#39;cpu_profile&#39;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">profile</span><span class="o">.</span><span class="n">stats</span><span class="p">)</span>  <span class="c1"># type: ignore[attr-defined]</span>

       <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">enable_memory_profiling</span><span class="p">:</span>
         <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">hpy</span><span class="p">:</span>
           <span class="k">pass</span>
         <span class="k">else</span><span class="p">:</span>
           <span class="n">h</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">hpy</span><span class="o">.</span><span class="n">heap</span><span class="p">()</span>
           <span class="n">heap_dump_data</span> <span class="o">=</span> <span class="s1">&#39;</span><span class="si">%s</span><span class="se">\n</span><span class="si">%s</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="p">(</span><span class="n">h</span><span class="p">,</span> <span class="n">h</span><span class="o">.</span><span class="n">more</span><span class="p">)</span>
           <span class="bp">self</span><span class="o">.</span><span class="n">_upload_profile_data</span><span class="p">(</span>
               <span class="bp">self</span><span class="o">.</span><span class="n">profile_location</span><span class="p">,</span>
               <span class="s1">&#39;memory_profile&#39;</span><span class="p">,</span>
               <span class="n">heap_dump_data</span><span class="p">,</span>
               <span class="n">write_binary</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>

     <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">log_results</span><span class="p">:</span>
       <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">enable_cpu_profiling</span><span class="p">:</span>
         <span class="n">s</span> <span class="o">=</span> <span class="n">io</span><span class="o">.</span><span class="n">StringIO</span><span class="p">()</span>
         <span class="bp">self</span><span class="o">.</span><span class="n">stats</span> <span class="o">=</span> <span class="n">pstats</span><span class="o">.</span><span class="n">Stats</span><span class="p">(</span>
             <span class="bp">self</span><span class="o">.</span><span class="n">profile</span><span class="p">,</span> <span class="n">stream</span><span class="o">=</span><span class="n">s</span><span class="p">)</span><span class="o">.</span><span class="n">sort_stats</span><span class="p">(</span><span class="n">Profile</span><span class="o">.</span><span class="n">SORTBY</span><span class="p">)</span>
         <span class="bp">self</span><span class="o">.</span><span class="n">stats</span><span class="o">.</span><span class="n">print_stats</span><span class="p">()</span>
         <span class="n">_LOGGER</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">&#39;Cpu profiler data: [</span><span class="si">%s</span><span class="s1">]&#39;</span><span class="p">,</span> <span class="n">s</span><span class="o">.</span><span class="n">getvalue</span><span class="p">())</span>
       <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">enable_memory_profiling</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">hpy</span><span class="p">:</span>
         <span class="n">_LOGGER</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">&#39;Memory profiler data: </span><span class="se">\n</span><span class="si">%s</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">hpy</span><span class="o">.</span><span class="n">heap</span><span class="p">())</span>

 <div class="viewcode-block" id="Profile.default_file_copy_fn"><a class="viewcode-back" href="../../../apache_beam.utils.profiler.html#apache_beam.utils.profiler.Profile.default_file_copy_fn">[docs]</a>  <span class="nd">@staticmethod</span>
   <span class="k">def</span> <span class="nf">default_file_copy_fn</span><span class="p">(</span><span class="n">src</span><span class="p">,</span> <span class="n">dest</span><span class="p">):</span>
     <span class="n">dest_handle</span> <span class="o">=</span> <span class="n">filesystems</span><span class="o">.</span><span class="n">FileSystems</span><span class="o">.</span><span class="n">create</span><span class="p">(</span><span class="n">dest</span> <span class="o">+</span> <span class="s1">&#39;.tmp&#39;</span><span class="p">)</span>
     <span class="k">try</span><span class="p">:</span>
       <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">src</span><span class="p">,</span> <span class="s1">&#39;rb&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">src_handle</span><span class="p">:</span>
         <span class="n">dest_handle</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">src_handle</span><span class="o">.</span><span class="n">read</span><span class="p">())</span>
     <span class="k">finally</span><span class="p">:</span>
       <span class="n">dest_handle</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
     <span class="n">filesystems</span><span class="o">.</span><span class="n">FileSystems</span><span class="o">.</span><span class="n">rename</span><span class="p">([</span><span class="n">dest</span> <span class="o">+</span> <span class="s1">&#39;.tmp&#39;</span><span class="p">],</span> <span class="p">[</span><span class="n">dest</span><span class="p">])</span></div>

 <div class="viewcode-block" id="Profile.factory_from_options"><a class="viewcode-back" href="../../../apache_beam.utils.profiler.html#apache_beam.utils.profiler.Profile.factory_from_options">[docs]</a>  <span class="nd">@staticmethod</span>
   <span class="k">def</span> <span class="nf">factory_from_options</span><span class="p">(</span><span class="n">options</span><span class="p">):</span>
     <span class="c1"># type: (...) -&gt; Optional[Callable[..., Profile]]</span>
     <span class="k">if</span> <span class="n">options</span><span class="o">.</span><span class="n">profile_cpu</span> <span class="ow">or</span> <span class="n">options</span><span class="o">.</span><span class="n">profile_memory</span><span class="p">:</span>

       <span class="k">def</span> <span class="nf">create_profiler</span><span class="p">(</span><span class="n">profile_id</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
         <span class="k">if</span> <span class="n">random</span><span class="o">.</span><span class="n">random</span><span class="p">()</span> <span class="o">&lt;</span> <span class="n">options</span><span class="o">.</span><span class="n">profile_sample_rate</span><span class="p">:</span>
           <span class="k">return</span> <span class="n">Profile</span><span class="p">(</span>
               <span class="n">profile_id</span><span class="p">,</span>
               <span class="n">options</span><span class="o">.</span><span class="n">profile_location</span><span class="p">,</span>
               <span class="n">enable_cpu_profiling</span><span class="o">=</span><span class="n">options</span><span class="o">.</span><span class="n">profile_cpu</span><span class="p">,</span>
               <span class="n">enable_memory_profiling</span><span class="o">=</span><span class="n">options</span><span class="o">.</span><span class="n">profile_memory</span><span class="p">,</span>
               <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>

       <span class="k">return</span> <span class="n">create_profiler</span>
     <span class="k">return</span> <span class="kc">None</span></div>

   <span class="k">def</span> <span class="nf">_upload_profile_data</span><span class="p">(</span>
       <span class="bp">self</span><span class="p">,</span> <span class="n">profile_location</span><span class="p">,</span> <span class="nb">dir</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">write_binary</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span>
     <span class="c1"># type: (...) -&gt; str</span>
     <span class="n">dump_location</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span>
         <span class="n">profile_location</span><span class="p">,</span>
         <span class="nb">dir</span><span class="p">,</span>
         <span class="n">time</span><span class="o">.</span><span class="n">strftime</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">time_prefix</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">profile_id</span><span class="p">))</span>
     <span class="n">fd</span><span class="p">,</span> <span class="n">filename</span> <span class="o">=</span> <span class="n">tempfile</span><span class="o">.</span><span class="n">mkstemp</span><span class="p">()</span>
     <span class="k">try</span><span class="p">:</span>
       <span class="n">os</span><span class="o">.</span><span class="n">close</span><span class="p">(</span><span class="n">fd</span><span class="p">)</span>
       <span class="k">if</span> <span class="n">write_binary</span><span class="p">:</span>
         <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s1">&#39;wb&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">fb</span><span class="p">:</span>
           <span class="kn">import</span> <span class="nn">marshal</span>
           <span class="n">marshal</span><span class="o">.</span><span class="n">dump</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">fb</span><span class="p">)</span>
       <span class="k">else</span><span class="p">:</span>
         <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s1">&#39;w&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
           <span class="n">f</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
       <span class="n">_LOGGER</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">&#39;Copying profiler data to: [</span><span class="si">%s</span><span class="s1">]&#39;</span><span class="p">,</span> <span class="n">dump_location</span><span class="p">)</span>
       <span class="bp">self</span><span class="o">.</span><span class="n">file_copy_fn</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="n">dump_location</span><span class="p">)</span>
     <span class="k">finally</span><span class="p">:</span>
       <span class="n">os</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>

     <span class="k">return</span> <span class="n">dump_location</span></div>
 </pre></div>

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