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<h1>Source code for tensorrt_llm.llmapi.build_cache</h1><div class="highlight"><pre>
<span></span><span class="kn">import</span> <span class="nn">contextlib</span>
<span class="kn">import</span> <span class="nn">datetime</span>
<span class="kn">import</span> <span class="nn">enum</span>
<span class="kn">import</span> <span class="nn">hashlib</span>
<span class="kn">import</span> <span class="nn">json</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">shutil</span>
<span class="kn">from</span> <span class="nn">dataclasses</span> <span class="kn">import</span> <span class="n">dataclass</span>
<span class="kn">from</span> <span class="nn">pathlib</span> <span class="kn">import</span> <span class="n">Path</span>
<span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Any</span><span class="p">,</span> <span class="n">List</span><span class="p">,</span> <span class="n">Optional</span>
<span class="kn">import</span> <span class="nn">filelock</span>
<span class="kn">import</span> <span class="nn">tensorrt_llm</span>
<span class="kn">from</span> <span class="nn">tensorrt_llm</span> <span class="kn">import</span> <span class="n">BuildConfig</span>
<span class="kn">from</span> <span class="nn">tensorrt_llm.llmapi.utils</span> <span class="kn">import</span> <span class="n">enable_llm_debug</span><span class="p">,</span> <span class="n">print_colored</span>
<span class="kn">from</span> <span class="nn">tensorrt_llm.logger</span> <span class="kn">import</span> <span class="n">logger</span>
<span class="k">def</span> <span class="nf">get_build_cache_config_from_env</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="nb">tuple</span><span class="p">[</span><span class="nb">bool</span><span class="p">,</span> <span class="nb">str</span><span class="p">]:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Get the build cache configuration from the environment variables</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">build_cache_enabled</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;TLLM_LLMAPI_BUILD_CACHE&#39;</span><span class="p">)</span> <span class="o">==</span> <span class="s1">&#39;1&#39;</span>
<span class="n">build_cache_root</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span>
<span class="s1">&#39;TLLM_LLMAPI_BUILD_CACHE_ROOT&#39;</span><span class="p">,</span>
<span class="s1">&#39;/tmp/.cache/tensorrt_llm/llmapi/&#39;</span><span class="p">)</span> <span class="c1"># nosec B108</span>
<span class="k">return</span> <span class="n">build_cache_enabled</span><span class="p">,</span> <span class="n">build_cache_root</span>
<div class="viewcode-block" id="BuildCacheConfig">
<a class="viewcode-back" href="../../../llm-api/reference.html#tensorrt_llm.llmapi.BuildCacheConfig">[docs]</a>
<span class="k">class</span> <span class="nc">BuildCacheConfig</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Configuration for the build cache.</span>
<span class="sd"> Attributes:</span>
<span class="sd"> cache_root (str): The root directory for the build cache.</span>
<span class="sd"> max_records (int): The maximum number of records to store in the cache.</span>
<span class="sd"> max_cache_storage_gb (float): The maximum amount of storage (in GB) to use for the cache.</span>
<span class="sd"> Note:</span>
<span class="sd"> The build-cache assumes the weights of the model are not changed during the execution. If the weights are</span>
<span class="sd"> changed, you should remove the caches manually.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<div class="viewcode-block" id="BuildCacheConfig.__init__">
<a class="viewcode-back" href="../../../llm-api/reference.html#tensorrt_llm.llmapi.BuildCacheConfig.__init__">[docs]</a>
<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">cache_root</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Path</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
<span class="n">max_records</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">10</span><span class="p">,</span>
<span class="n">max_cache_storage_gb</span><span class="p">:</span> <span class="nb">float</span> <span class="o">=</span> <span class="mi">256</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cache_root</span> <span class="o">=</span> <span class="n">cache_root</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_max_records</span> <span class="o">=</span> <span class="n">max_records</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_max_cache_storage_gb</span> <span class="o">=</span> <span class="n">max_cache_storage_gb</span></div>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">cache_root</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Path</span><span class="p">:</span>
<span class="n">_build_cache_enabled</span><span class="p">,</span> <span class="n">_build_cache_root</span> <span class="o">=</span> <span class="n">get_build_cache_config_from_env</span><span class="p">(</span>
<span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cache_root</span> <span class="ow">or</span> <span class="n">Path</span><span class="p">(</span><span class="n">_build_cache_root</span><span class="p">)</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">max_records</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">int</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_max_records</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">max_cache_storage_gb</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">float</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_max_cache_storage_gb</span></div>
<span class="k">class</span> <span class="nc">BuildCache</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> The BuildCache class is a class that manages the intermediate products from the build steps.</span>
<span class="sd"> NOTE: currently, only engine-building is supported</span>
<span class="sd"> TODO[chunweiy]: add support for other build steps, such as quantization, convert_checkpoint, etc.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="c1"># The version of the cache, will be used to determine if the cache is compatible</span>
<span class="n">CACHE_VERSION</span> <span class="o">=</span> <span class="mi">0</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">config</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">BuildCacheConfig</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">):</span>
<span class="n">_</span><span class="p">,</span> <span class="n">default_cache_root</span> <span class="o">=</span> <span class="n">get_build_cache_config_from_env</span><span class="p">()</span>
<span class="n">config</span> <span class="o">=</span> <span class="n">config</span> <span class="ow">or</span> <span class="n">BuildCacheConfig</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cache_root</span> <span class="o">=</span> <span class="n">config</span><span class="o">.</span><span class="n">cache_root</span> <span class="ow">or</span> <span class="n">Path</span><span class="p">(</span><span class="n">default_cache_root</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">max_records</span> <span class="o">=</span> <span class="n">config</span><span class="o">.</span><span class="n">max_records</span>
<span class="bp">self</span><span class="o">.</span><span class="n">max_cache_storage_gb</span> <span class="o">=</span> <span class="n">config</span><span class="o">.</span><span class="n">max_cache_storage_gb</span>
<span class="k">if</span> <span class="n">config</span><span class="o">.</span><span class="n">max_records</span> <span class="o">&lt;</span> <span class="mi">1</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">&quot;max_records should be greater than 0&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">free_storage_in_gb</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">float</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&#39;&#39;&#39; Get the free storage capacity of the cache. &#39;&#39;&#39;</span>
<span class="c1"># measure the root directory</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">cache_root</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">exists</span><span class="p">():</span>
<span class="n">usage</span> <span class="o">=</span> <span class="n">shutil</span><span class="o">.</span><span class="n">disk_usage</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">cache_root</span><span class="o">.</span><span class="n">parent</span><span class="p">)</span>
<span class="k">return</span> <span class="n">usage</span><span class="o">.</span><span class="n">free</span> <span class="o">/</span> <span class="mi">1024</span><span class="o">**</span><span class="mi">3</span>
<span class="k">return</span> <span class="mi">0</span>
<span class="k">def</span> <span class="nf">get_engine_building_cache_stage</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span>
<span class="n">build_config</span><span class="p">:</span> <span class="n">BuildConfig</span><span class="p">,</span>
<span class="n">model_path</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Path</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
<span class="n">force_rebuild</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
<span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="s1">&#39;CachedStage&#39;</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&#39;&#39;&#39;</span>
<span class="sd"> Get the build step for engine building.</span>
<span class="sd"> &#39;&#39;&#39;</span>
<span class="n">build_config_str</span> <span class="o">=</span> <span class="n">json</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">prune_build_config_for_cache_key</span><span class="p">(</span>
<span class="n">build_config</span><span class="o">.</span><span class="n">to_dict</span><span class="p">()),</span>
<span class="n">sort_keys</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="n">kwargs_str</span> <span class="o">=</span> <span class="n">json</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="n">kwargs</span><span class="p">,</span> <span class="n">sort_keys</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="k">return</span> <span class="n">CachedStage</span><span class="p">(</span><span class="n">parent</span><span class="o">=</span><span class="bp">self</span><span class="p">,</span>
<span class="n">kind</span><span class="o">=</span><span class="n">CacheRecord</span><span class="o">.</span><span class="n">Kind</span><span class="o">.</span><span class="n">Engine</span><span class="p">,</span>
<span class="n">cache_root</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">cache_root</span><span class="p">,</span>
<span class="n">force_rebuild</span><span class="o">=</span><span class="n">force_rebuild</span><span class="p">,</span>
<span class="n">inputs</span><span class="o">=</span><span class="p">[</span><span class="n">build_config_str</span><span class="p">,</span> <span class="n">model_path</span><span class="p">,</span> <span class="n">kwargs_str</span><span class="p">])</span>
<span class="k">def</span> <span class="nf">prune_caches</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">has_incoming_record</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&#39;&#39;&#39;</span>
<span class="sd"> Clean up the cache records to make sure the cache size is within the limit</span>
<span class="sd"> Args:</span>
<span class="sd"> has_incoming_record (bool): If the cache has incoming record, the existing records will be further pruned to</span>
<span class="sd"> reserve space for the incoming record</span>
<span class="sd"> &#39;&#39;&#39;</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">cache_root</span><span class="o">.</span><span class="n">exists</span><span class="p">():</span>
<span class="k">return</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_clean_up_cache_dir</span><span class="p">()</span>
<span class="n">records</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="nb">dir</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">cache_root</span><span class="o">.</span><span class="n">iterdir</span><span class="p">():</span>
<span class="n">records</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_load_cache_record</span><span class="p">(</span><span class="nb">dir</span><span class="p">))</span>
<span class="n">records</span><span class="o">.</span><span class="n">sort</span><span class="p">(</span><span class="n">key</span><span class="o">=</span><span class="k">lambda</span> <span class="n">x</span><span class="p">:</span> <span class="n">x</span><span class="o">.</span><span class="n">time</span><span class="p">,</span> <span class="n">reverse</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="n">max_records</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">max_records</span> <span class="o">-</span> <span class="mi">1</span> <span class="k">if</span> <span class="n">has_incoming_record</span> <span class="k">else</span> <span class="bp">self</span><span class="o">.</span><span class="n">max_records</span>
<span class="c1"># prune the cache to meet max_records and max_cache_storage_gb limitation</span>
<span class="k">while</span> <span class="nb">len</span><span class="p">(</span><span class="n">records</span><span class="p">)</span> <span class="o">&gt;</span> <span class="n">max_records</span> <span class="ow">or</span> <span class="nb">sum</span><span class="p">(</span>
<span class="n">r</span><span class="o">.</span><span class="n">storage_gb</span> <span class="k">for</span> <span class="n">r</span> <span class="ow">in</span> <span class="n">records</span><span class="p">)</span> <span class="o">&gt;</span> <span class="bp">self</span><span class="o">.</span><span class="n">max_cache_storage_gb</span><span class="p">:</span>
<span class="n">record</span> <span class="o">=</span> <span class="n">records</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
<span class="c1"># remove the directory and its content</span>
<span class="n">shutil</span><span class="o">.</span><span class="n">rmtree</span><span class="p">(</span><span class="n">record</span><span class="o">.</span><span class="n">path</span><span class="p">)</span>
<span class="nd">@staticmethod</span>
<span class="k">def</span> <span class="nf">prune_build_config_for_cache_key</span><span class="p">(</span><span class="n">build_config</span><span class="p">:</span> <span class="nb">dict</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">dict</span><span class="p">:</span>
<span class="c1"># The BuildCache will be disabled once auto_pp is enabled, so &#39;auto_parallel_config&#39; should be removed</span>
<span class="n">black_list</span> <span class="o">=</span> <span class="p">[</span><span class="s1">&#39;auto_parallel_config&#39;</span><span class="p">,</span> <span class="s1">&#39;dry_run&#39;</span><span class="p">]</span>
<span class="n">dic</span> <span class="o">=</span> <span class="n">build_config</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
<span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">black_list</span><span class="p">:</span>
<span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">dic</span><span class="p">:</span>
<span class="n">dic</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
<span class="k">return</span> <span class="n">dic</span>
<span class="k">def</span> <span class="nf">load_cache_records</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">List</span><span class="p">[</span><span class="s2">&quot;CacheRecord&quot;</span><span class="p">]:</span>
<span class="w"> </span><span class="sd">&#39;&#39;&#39;</span>
<span class="sd"> Load all the cache records from the cache directory</span>
<span class="sd"> &#39;&#39;&#39;</span>
<span class="n">records</span> <span class="o">=</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">cache_root</span><span class="o">.</span><span class="n">exists</span><span class="p">():</span>
<span class="k">return</span> <span class="n">records</span>
<span class="k">for</span> <span class="nb">dir</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">cache_root</span><span class="o">.</span><span class="n">iterdir</span><span class="p">():</span>
<span class="n">records</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_load_cache_record</span><span class="p">(</span><span class="nb">dir</span><span class="p">))</span>
<span class="k">return</span> <span class="n">records</span>
<span class="k">def</span> <span class="nf">_load_cache_record</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">cache_dir</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="s2">&quot;CacheRecord&quot;</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&#39;&#39;&#39;</span>
<span class="sd"> Get the cache record from the cache directory</span>
<span class="sd"> &#39;&#39;&#39;</span>
<span class="n">metadata</span> <span class="o">=</span> <span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">((</span><span class="n">cache_dir</span> <span class="o">/</span> <span class="s1">&#39;metadata.json&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">read_text</span><span class="p">())</span>
<span class="n">storage_gb</span> <span class="o">=</span> <span class="nb">sum</span><span class="p">(</span><span class="n">f</span><span class="o">.</span><span class="n">stat</span><span class="p">()</span><span class="o">.</span><span class="n">st_size</span> <span class="k">for</span> <span class="n">f</span> <span class="ow">in</span> <span class="n">cache_dir</span><span class="o">.</span><span class="n">glob</span><span class="p">(</span><span class="s1">&#39;**/*&#39;</span><span class="p">)</span>
<span class="k">if</span> <span class="n">f</span><span class="o">.</span><span class="n">is_file</span><span class="p">())</span> <span class="o">/</span> <span class="mi">1024</span><span class="o">**</span><span class="mi">3</span>
<span class="k">return</span> <span class="n">CacheRecord</span><span class="p">(</span><span class="n">kind</span><span class="o">=</span><span class="n">CacheRecord</span><span class="o">.</span><span class="n">Kind</span><span class="o">.</span><span class="n">__members__</span><span class="p">[</span><span class="n">metadata</span><span class="p">[</span><span class="s1">&#39;kind&#39;</span><span class="p">]],</span>
<span class="n">storage_gb</span><span class="o">=</span><span class="n">storage_gb</span><span class="p">,</span>
<span class="n">path</span><span class="o">=</span><span class="n">cache_dir</span><span class="p">,</span>
<span class="n">time</span><span class="o">=</span><span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">fromisoformat</span><span class="p">(</span>
<span class="n">metadata</span><span class="p">[</span><span class="s1">&#39;datetime&#39;</span><span class="p">]))</span>
<span class="k">def</span> <span class="nf">_clean_up_cache_dir</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&#39;&#39;&#39;</span>
<span class="sd"> Clean up the files in the cache directory, remove anything that is not in the cache</span>
<span class="sd"> &#39;&#39;&#39;</span>
<span class="c1"># get all the files and directies in the cache_root</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">cache_root</span><span class="o">.</span><span class="n">exists</span><span class="p">():</span>
<span class="k">return</span>
<span class="k">for</span> <span class="n">file_or_dir</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">cache_root</span><span class="o">.</span><span class="n">iterdir</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">is_cache_valid</span><span class="p">(</span><span class="n">file_or_dir</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="sa">f</span><span class="s2">&quot;Removing invalid cache directory </span><span class="si">{</span><span class="nb">dir</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
<span class="k">if</span> <span class="n">file_or_dir</span><span class="o">.</span><span class="n">is_file</span><span class="p">():</span>
<span class="n">file_or_dir</span><span class="o">.</span><span class="n">unlink</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">shutil</span><span class="o">.</span><span class="n">rmtree</span><span class="p">(</span><span class="n">file_or_dir</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">is_cache_valid</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">cache_dir</span><span class="p">:</span> <span class="n">Path</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">bool</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&#39;&#39;&#39;</span>
<span class="sd"> Check if the cache directory is valid</span>
<span class="sd"> &#39;&#39;&#39;</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">cache_dir</span><span class="o">.</span><span class="n">exists</span><span class="p">():</span>
<span class="k">return</span> <span class="kc">False</span>
<span class="n">metadata_path</span> <span class="o">=</span> <span class="n">cache_dir</span> <span class="o">/</span> <span class="s1">&#39;metadata.json&#39;</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">metadata_path</span><span class="o">.</span><span class="n">exists</span><span class="p">():</span>
<span class="k">return</span> <span class="kc">False</span>
<span class="n">metadata</span> <span class="o">=</span> <span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">metadata_path</span><span class="o">.</span><span class="n">read_text</span><span class="p">())</span>
<span class="k">if</span> <span class="n">metadata</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;version&#39;</span><span class="p">)</span> <span class="o">!=</span> <span class="n">BuildCache</span><span class="o">.</span><span class="n">CACHE_VERSION</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">False</span>
<span class="n">content</span> <span class="o">=</span> <span class="n">cache_dir</span> <span class="o">/</span> <span class="s1">&#39;content&#39;</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">content</span><span class="o">.</span><span class="n">exists</span><span class="p">():</span>
<span class="k">return</span> <span class="kc">False</span>
<span class="k">return</span> <span class="kc">True</span>
<span class="nd">@dataclass</span>
<span class="k">class</span> <span class="nc">CachedStage</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&#39;&#39;&#39;</span>
<span class="sd"> CachedStage is a class that represents a stage in the build process, it helps to manage the intermediate product.</span>
<span class="sd"> The cache is organized as follows:</span>
<span class="sd"> this_cache_dir/ # name is like &quot;engine-&lt;hash&gt;&quot;</span>
<span class="sd"> metadata.json # the metadata of the cache</span>
<span class="sd"> content/ # the actual product of the build step, such trt-llm engine directory</span>
<span class="sd"> &#39;&#39;&#39;</span>
<span class="c1"># The parent should be kept alive by CachedStep instance</span>
<span class="n">parent</span><span class="p">:</span> <span class="n">BuildCache</span>
<span class="n">cache_root</span><span class="p">:</span> <span class="n">Path</span>
<span class="c1"># The inputs will be used to determine if the step needs to be re-run, so all the variables should be put here</span>
<span class="n">inputs</span><span class="p">:</span> <span class="n">List</span><span class="p">[</span><span class="n">Any</span><span class="p">]</span>
<span class="n">kind</span><span class="p">:</span> <span class="s2">&quot;CacheRecord.Kind&quot;</span>
<span class="c1"># If force_rebuild is set to True, the cache will be ignored</span>
<span class="n">force_rebuild</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">get_hash_key</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">lib_version</span> <span class="o">=</span> <span class="n">tensorrt_llm</span><span class="o">.</span><span class="n">__version__</span>
<span class="n">input_strs</span> <span class="o">=</span> <span class="p">[</span><span class="nb">str</span><span class="p">(</span><span class="n">i</span><span class="p">)</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">inputs</span><span class="p">]</span>
<span class="k">return</span> <span class="n">hashlib</span><span class="o">.</span><span class="n">md5</span><span class="p">(</span>
<span class="sa">f</span><span class="s2">&quot;</span><span class="si">{</span><span class="n">lib_version</span><span class="si">}</span><span class="s2">-</span><span class="si">{</span><span class="n">input_strs</span><span class="si">}</span><span class="s2">&quot;</span><span class="o">.</span><span class="n">encode</span><span class="p">())</span><span class="o">.</span><span class="n">hexdigest</span><span class="p">()</span> <span class="c1"># nosec B324</span>
<span class="k">def</span> <span class="nf">get_cache_path</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Path</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&#39;&#39;&#39;</span>
<span class="sd"> The path to the product of the build step, will be overwritten if the step is re-run</span>
<span class="sd"> &#39;&#39;&#39;</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">cache_root</span> <span class="o">/</span> <span class="sa">f</span><span class="s2">&quot;</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">kind</span><span class="o">.</span><span class="n">value</span><span class="si">}</span><span class="s2">-</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">get_hash_key</span><span class="p">()</span><span class="si">}</span><span class="s2">&quot;</span>
<span class="k">def</span> <span class="nf">get_engine_path</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Path</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_cache_path</span><span class="p">()</span> <span class="o">/</span> <span class="s1">&#39;content&#39;</span>
<span class="k">def</span> <span class="nf">get_cache_metadata</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">dict</span><span class="p">:</span>
<span class="n">res</span> <span class="o">=</span> <span class="p">{</span>
<span class="s2">&quot;version&quot;</span><span class="p">:</span> <span class="n">BuildCache</span><span class="o">.</span><span class="n">CACHE_VERSION</span><span class="p">,</span>
<span class="s2">&quot;datetime&quot;</span><span class="p">:</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">now</span><span class="p">()</span><span class="o">.</span><span class="n">isoformat</span><span class="p">(),</span>
<span class="s2">&quot;kind&quot;</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">kind</span><span class="o">.</span><span class="n">name</span><span class="p">,</span>
<span class="p">}</span>
<span class="k">return</span> <span class="n">res</span>
<span class="k">def</span> <span class="nf">is_cached</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">bool</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&#39;&#39;&#39;</span>
<span class="sd"> Check if the product of the build step is in the cache</span>
<span class="sd"> &#39;&#39;&#39;</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">force_rebuild</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">False</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_cache_path</span><span class="p">()</span><span class="o">.</span><span class="n">exists</span><span class="p">():</span>
<span class="n">metadata</span> <span class="o">=</span> <span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span>
<span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">get_cache_path</span><span class="p">()</span> <span class="o">/</span> <span class="s1">&#39;metadata.json&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">read_text</span><span class="p">())</span>
<span class="k">if</span> <span class="n">metadata</span><span class="p">[</span><span class="s2">&quot;version&quot;</span><span class="p">]</span> <span class="o">==</span> <span class="n">BuildCache</span><span class="o">.</span><span class="n">CACHE_VERSION</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">True</span>
<span class="k">except</span><span class="p">:</span>
<span class="k">pass</span>
<span class="k">return</span> <span class="kc">False</span>
<span class="nd">@contextlib</span><span class="o">.</span><span class="n">contextmanager</span>
<span class="k">def</span> <span class="nf">write_guard</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&#39;&#39;&#39; Guard the cache writing process.</span>
<span class="sd"> The cache writing process should be atomic, so the filelock is used to protect the cache writing process. And</span>
<span class="sd"> the cache metadata will be written to the cache directory.</span>
<span class="sd"> Args:</span>
<span class="sd"> final_engien_dir: the final engine directory</span>
<span class="sd"> &#39;&#39;&#39;</span>
<span class="bp">self</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">prune_caches</span><span class="p">(</span><span class="n">has_incoming_record</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="n">target_dir</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_cache_path</span><span class="p">()</span>
<span class="k">if</span> <span class="n">enable_llm_debug</span><span class="p">():</span>
<span class="n">print_colored</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Writing cache to </span><span class="si">{</span><span class="n">target_dir</span><span class="si">}</span><span class="se">\n</span><span class="s2">&quot;</span><span class="p">,</span> <span class="s2">&quot;yellow&quot;</span><span class="p">)</span>
<span class="c1"># To avoid the cache modification conflict, a dummy directory is used to write the cache, and then rename it to</span>
<span class="c1"># the target directory</span>
<span class="n">dummy_target_dir</span> <span class="o">=</span> <span class="n">Path</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;</span><span class="si">{</span><span class="n">target_dir</span><span class="o">.</span><span class="n">parent</span><span class="si">}</span><span class="s2">/</span><span class="si">{</span><span class="n">target_dir</span><span class="o">.</span><span class="n">name</span><span class="si">}</span><span class="s2">.dummy&quot;</span><span class="p">)</span>
<span class="n">dummy_target_dir</span><span class="o">.</span><span class="n">mkdir</span><span class="p">(</span><span class="n">parents</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">exist_ok</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="c1"># TODO[chunweiy]: deal with the cache modification conflict</span>
<span class="n">lock</span> <span class="o">=</span> <span class="n">filelock</span><span class="o">.</span><span class="n">FileLock</span><span class="p">(</span><span class="n">dummy_target_dir</span> <span class="o">/</span> <span class="s1">&#39;.filelock&#39;</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="mi">10</span><span class="p">)</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">dummy_target_dir</span> <span class="o">/</span> <span class="s1">&#39;metadata.json&#39;</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">json</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">get_cache_metadata</span><span class="p">()))</span>
<span class="k">with</span> <span class="n">lock</span><span class="p">:</span>
<span class="k">yield</span> <span class="n">dummy_target_dir</span> <span class="o">/</span> <span class="s1">&#39;content&#39;</span>
<span class="c1"># If engine building is successful, rename the dummy directory to the target directory</span>
<span class="k">if</span> <span class="n">target_dir</span><span class="o">.</span><span class="n">exists</span><span class="p">():</span>
<span class="n">shutil</span><span class="o">.</span><span class="n">rmtree</span><span class="p">(</span><span class="n">target_dir</span><span class="p">)</span>
<span class="n">shutil</span><span class="o">.</span><span class="n">move</span><span class="p">(</span><span class="n">dummy_target_dir</span><span class="p">,</span> <span class="n">target_dir</span><span class="p">)</span>
<span class="nd">@dataclass</span><span class="p">(</span><span class="n">unsafe_hash</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">CacheRecord</span><span class="p">:</span>
<span class="w"> </span><span class="sd">&#39;&#39;&#39;</span>
<span class="sd"> CacheRecord is a class that represents a record in the cache directory.</span>
<span class="sd"> &#39;&#39;&#39;</span>
<span class="k">class</span> <span class="nc">Kind</span><span class="p">(</span><span class="n">enum</span><span class="o">.</span><span class="n">Enum</span><span class="p">):</span>
<span class="n">Engine</span> <span class="o">=</span> <span class="s1">&#39;engine&#39;</span>
<span class="n">Checkpoint</span> <span class="o">=</span> <span class="s1">&#39;checkpoint&#39;</span>
<span class="n">kind</span><span class="p">:</span> <span class="n">Kind</span>
<span class="n">storage_gb</span><span class="p">:</span> <span class="nb">float</span>
<span class="n">path</span><span class="p">:</span> <span class="n">Path</span>
<span class="n">time</span><span class="p">:</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span>
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