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<h1>Source code for arrayfire.timer</h1><div class="highlight"><pre>
<span></span><span class="c1">#######################################################</span>
<span class="c1"># Copyright (c) 2015, ArrayFire</span>
<span class="c1"># All rights reserved.</span>
<span class="c1">#</span>
<span class="c1"># This file is distributed under 3-clause BSD license.</span>
<span class="c1"># The complete license agreement can be obtained at:</span>
<span class="c1"># http://arrayfire.com/licenses/BSD-3-Clause</span>
<span class="c1">########################################################</span>
<span class="sd">"""</span>
<span class="sd">Functions to time arrayfire.</span>
<span class="sd">"""</span>
<span class="kn">from</span> <span class="nn">.library</span> <span class="k">import</span> <span class="o">*</span>
<span class="kn">from</span> <span class="nn">.device</span> <span class="k">import</span> <span class="p">(</span><span class="n">sync</span><span class="p">,</span> <span class="nb">eval</span><span class="p">)</span>
<span class="kn">from</span> <span class="nn">time</span> <span class="k">import</span> <span class="n">time</span>
<span class="kn">import</span> <span class="nn">math</span>
<div class="viewcode-block" id="timeit"><a class="viewcode-back" href="../../arrayfire.timer.html#arrayfire.timer.timeit">[docs]</a><span class="k">def</span> <span class="nf">timeit</span><span class="p">(</span><span class="n">af_func</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Function to time arrayfire functions.</span>
<span class="sd"> Parameters</span>
<span class="sd"> ----------</span>
<span class="sd"> af_func : arrayfire function</span>
<span class="sd"> *args : arguments to `af_func`</span>
<span class="sd"> Returns</span>
<span class="sd"> --------</span>
<span class="sd"> t : Time in seconds</span>
<span class="sd"> """</span>
<span class="n">sample_trials</span> <span class="o">=</span> <span class="mi">3</span>
<span class="n">sample_time</span> <span class="o">=</span> <span class="mi">1</span><span class="n">E20</span>
<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">sample_trials</span><span class="p">):</span>
<span class="n">start</span> <span class="o">=</span> <span class="n">time</span><span class="p">()</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">af_func</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">)</span>
<span class="nb">eval</span><span class="p">(</span><span class="n">res</span><span class="p">)</span>
<span class="n">sync</span><span class="p">()</span>
<span class="n">sample_time</span> <span class="o">=</span> <span class="nb">min</span><span class="p">(</span><span class="n">sample_time</span><span class="p">,</span> <span class="n">time</span><span class="p">()</span> <span class="o">-</span> <span class="n">start</span><span class="p">)</span>
<span class="k">if</span> <span class="p">(</span><span class="n">sample_time</span> <span class="o">>=</span> <span class="mf">0.5</span><span class="p">):</span>
<span class="k">return</span> <span class="n">sample_time</span>
<span class="n">num_iters</span> <span class="o">=</span> <span class="nb">max</span><span class="p">(</span><span class="n">math</span><span class="o">.</span><span class="n">ceil</span><span class="p">(</span><span class="mf">1.0</span> <span class="o">/</span> <span class="n">sample_time</span><span class="p">),</span> <span class="mf">3.0</span><span class="p">)</span>
<span class="n">start</span> <span class="o">=</span> <span class="n">time</span><span class="p">()</span>
<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">num_iters</span><span class="p">)):</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">af_func</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">)</span>
<span class="nb">eval</span><span class="p">(</span><span class="n">res</span><span class="p">)</span>
<span class="n">sync</span><span class="p">()</span>
<span class="n">sample_time</span> <span class="o">=</span> <span class="p">(</span><span class="n">time</span><span class="p">()</span> <span class="o">-</span> <span class="n">start</span><span class="p">)</span> <span class="o">/</span> <span class="n">num_iters</span>
<span class="k">return</span> <span class="n">sample_time</span></div>
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