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<a class="parent" href="../index.html">neox</a>
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<a class="parent" href="index.html">utils</a>
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<a href="https://github.com/labmlai/annotated_deep_learning_paper_implementations/tree/master/labml_nn/neox/utils/cache.py" target="_blank">
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<a href='#section-0'>#</a>
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<h1>用于中间激活的缓存</h1>
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<p>在推理过程中，模型逐个输出令牌。我们使用这个简单的缓存来存储键和值的注意层，这样我们就不必为以前的令牌重新计算它们了。</p>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">15</span><span></span><span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Any</span></pre></div>
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</div>
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<a href='#section-1'>#</a>
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<h2>缓存</h2>
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<p>这将维护一个键值缓存，并将推送值排队并按相同的顺序弹出它们。队列非常有用，因为我们有多个关注层。</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">18</span><span class="k">class</span> <span class="nc">Cache</span><span class="p">:</span></pre></div>
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</div>
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<div class='section' id='section-2'>
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<div class='docs'>
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<a href='#section-2'>#</a>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">26</span> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="lineno">27</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cache</span> <span class="o">=</span> <span class="p">{}</span></pre></div>
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<div class='section' id='section-3'>
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<div class='docs doc-strings'>
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<div class='section-link'>
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<a href='#section-3'>#</a>
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</div>
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<h3>清除缓存</h3>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">29</span> <span class="k">def</span> <span class="nf">clear_all</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-4'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-4'>#</a>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">33</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cache</span> <span class="o">=</span> <span class="p">{}</span></pre></div>
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</div>
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<div class='section' id='section-5'>
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<div class='docs doc-strings'>
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<div class='section-link'>
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<a href='#section-5'>#</a>
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</div>
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<h3>将值推送到队列</h3>
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<ul><li><code class="highlight"><span></span><span class="n">name</span></code>
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是队列的名称</li>
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<li><code class="highlight"><span></span><span class="n">value</span></code>
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是要推送的值</li></ul>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">35</span> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">value</span><span class="p">:</span> <span class="n">Any</span><span class="p">):</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-6'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-6'>#</a>
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</div>
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<p>如果队列不存在，请创建一个空队列</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">44</span> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cache</span><span class="p">:</span>
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<span class="lineno">45</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cache</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="p">[]</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-7'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-7'>#</a>
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</div>
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<p>推送到队列</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">48</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cache</span><span class="p">[</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">value</span><span class="p">)</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-8'>
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<div class='docs doc-strings'>
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<div class='section-link'>
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<a href='#section-8'>#</a>
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</div>
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<h3>返回队列的大小</h3>
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<ul><li><code class="highlight"><span></span><span class="n">name</span></code>
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是队列的名称</li>
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<p><em>返回</em>队列的大小（如果存在）否则 None</p></ul>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">50</span> <span class="k">def</span> <span class="nf">q_size</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-9'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-9'>#</a>
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</div>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">58</span> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cache</span><span class="p">:</span>
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<span class="lineno">59</span> <span class="k">return</span> <span class="kc">None</span>
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<span class="lineno">60</span>
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<span class="lineno">61</span> <span class="k">if</span> <span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_cache</span><span class="p">[</span><span class="n">name</span><span class="p">])</span> <span class="o">!=</span> <span class="nb">list</span><span class="p">:</span>
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<span class="lineno">62</span> <span class="k">return</span> <span class="kc">None</span>
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<span class="lineno">63</span>
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<span class="lineno">64</span> <span class="k">return</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_cache</span><span class="p">[</span><span class="n">name</span><span class="p">])</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-10'>
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<div class='docs doc-strings'>
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<div class='section-link'>
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<a href='#section-10'>#</a>
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</div>
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<h3>从队列中弹出</h3>
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<ul><li><code class="highlight"><span></span><span class="n">name</span></code>
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是队列的名称</li>
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<p><em>返回</em>值</p></ul>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">66</span> <span class="k">def</span> <span class="nf">pop</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">):</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-11'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-11'>#</a>
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</div>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">73</span> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cache</span><span class="p">[</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-12'>
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<div class='docs doc-strings'>
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<div class='section-link'>
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<a href='#section-12'>#</a>
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</div>
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<h3>缓存一个值</h3>
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<ul><li><code class="highlight"><span></span><span class="n">key</span></code>
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是要缓存的值的名称</li>
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<li><code class="highlight"><span></span><span class="n">value</span></code>
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是价值</li></ul>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">75</span> <span class="k">def</span> <span class="nf">set</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">value</span><span class="p">:</span> <span class="n">Any</span><span class="p">):</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-13'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-13'>#</a>
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</div>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">82</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cache</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-14'>
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<div class='docs doc-strings'>
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<div class='section-link'>
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<a href='#section-14'>#</a>
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</div>
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<h3>从缓存中检索值</h3>
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<ul><li><code class="highlight"><span></span><span class="n">key</span></code>
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是缓存时使用的名称</li>
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<li><code class="highlight"><span></span><span class="n">default</span></code>
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如果缓存为空，则为默认值</li>
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<p><em>返回</em>缓存的值</p></ul>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">84</span> <span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">default</span><span class="p">:</span> <span class="n">Any</span> <span class="o">=</span> <span class="kc">None</span><span class="p">):</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-15'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-15'>#</a>
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</div>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">92</span> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cache</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">default</span><span class="p">)</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-16'>
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<div class='docs doc-strings'>
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<div class='section-link'>
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<a href='#section-16'>#</a>
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</div>
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<h3>清除缓存值</h3>
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<ul><li><code class="highlight"><span></span><span class="n">key</span></code>
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是缓存时使用的名称</li></ul>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">94</span> <span class="k">def</span> <span class="nf">clear</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">:</span> <span class="nb">str</span><span class="p">):</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-17'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-17'>#</a>
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</div>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">100</span> <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cache</span><span class="p">[</span><span class="n">key</span><span class="p">]</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-18'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-18'>#</a>
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</div>
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<p>缓存的单例</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">104</span><span class="n">_INSTANCE</span> <span class="o">=</span> <span class="kc">None</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-19'>
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<div class='docs doc-strings'>
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<div class='section-link'>
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<a href='#section-19'>#</a>
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</div>
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<h3>获取缓存实例</h3>
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<ul><p><em>返回</em>缓存实例</p></ul>
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</div>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">107</span><span class="k">def</span> <span class="nf">get_cache</span><span class="p">()</span> <span class="o">-></span> <span class="n">Cache</span><span class="p">:</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-20'>
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<div class='docs'>
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<div class='code'>
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<div class="highlight"><pre><span class="lineno">113</span> <span class="k">global</span> <span class="n">_INSTANCE</span>
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<span class="lineno">114</span>
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<span class="lineno">115</span> <span class="k">if</span> <span class="n">_INSTANCE</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
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<span class="lineno">116</span> <span class="n">_INSTANCE</span> <span class="o">=</span> <span class="n">Cache</span><span class="p">()</span>
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<span class="lineno">117</span>
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<span class="lineno">118</span> <span class="k">return</span> <span class="n">_INSTANCE</span></pre></div>
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