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<li class="navelem"><a class="el" href="dir_120ed4da3e3217b1e7fc0b4f48568e79.html">test</a></li><li class="navelem"><a class="el" href="dir_318145072d948161b6b9385de457c361.html">beast</a></li> </ul>
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<div class="title">beast_io_latency_probe_test.cpp</div> </div>
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">//------------------------------------------------------------------------------</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/*</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> This file is part of rippled: https://github.com/ripple/rippled</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> Copyright (c) 2018 Ripple Labs Inc.</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> Permission to use, copy, modify, and/or distribute this software for any</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> purpose with or without fee is hereby granted, provided that the above</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> copyright notice and this permission notice appear in all copies.</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">*/</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">//==============================================================================</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <ripple/beast/asio/io_latency_probe.h></span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <ripple/beast/unit_test.h></span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  </div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <ripple/beast/test/yield_to.hpp></span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  </div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <boost/asio/basic_waitable_timer.hpp></span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <boost/asio/deadline_timer.hpp></span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <boost/asio/io_service.hpp></span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  </div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/algorithm.html">algorithm</a>></span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/chrono.html">chrono</a>></span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/mutex.html">mutex</a>></span></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/numeric.html">numeric</a>></span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/optional.html">optional</a>></span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/thread.html">thread</a>></span></div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/vector.html">vector</a>></span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  </div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">using namespace </span>std::chrono_literals;</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div>
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<div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="classio__latency__probe__test.html"> 38</a></span> <span class="keyword">class </span><a class="code" href="classio__latency__probe__test.html">io_latency_probe_test</a> : <span class="keyword">public</span> beast::unit_test::suite,</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keyword">public</span> beast::test::enable_yield_to</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> {</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keyword">using</span> <a class="code" href="classio__latency__probe__test.html#a306f92040b6aa71f94c22aa0dc026430">MyTimer</a> =</div>
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<div class="line"><a name="l00042"></a><span class="lineno"><a class="line" href="classio__latency__probe__test.html#a306f92040b6aa71f94c22aa0dc026430"> 42</a></span>  boost::asio::basic_waitable_timer<std::chrono::steady_clock>;</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  </div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#ifdef RIPPLED_RUNNING_IN_CI</span></div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  </div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keyword">template</span> <</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">class </span>Clock,</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keyword">class </span>MeasureClock = <a class="codeRef" href="http://en.cppreference.com/w/cpp/chrono/high_resolution_clock.html">std::chrono::high_resolution_clock</a>></div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">struct </span>measure_asio_timers</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  {</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">using</span> duration = <span class="keyword">typename</span> Clock::duration;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">using</span> rep = <span class="keyword">typename</span> MeasureClock::duration::rep;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  </div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector<duration></a> elapsed_times_;</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  </div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  measure_asio_timers(duration interval = 100ms, <span class="keywordtype">size_t</span> num_samples = 50)</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  {</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keyword">using namespace </span><a class="codeRef" href="http://en.cppreference.com/w/namespacestd_1_1chrono.html">std::chrono</a>;</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  boost::asio::io_service ios;</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/optional.html">std::optional<boost::asio::io_service::work></a> work{ios};</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/thread.html">std::thread</a> worker{[&] { ios.run(); }};</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  boost::asio::basic_waitable_timer<Clock> timer{ios};</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  elapsed_times_.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/reserve.html">reserve</a>(num_samples);</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/mutex.html">std::mutex</a> mtx;</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/unique_lock.html">std::unique_lock<std::mutex></a> mainlock{mtx};</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/condition_variable.html">std::condition_variable</a> cv;</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordtype">bool</span> done = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  boost::system::error_code wait_err;</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">while</span> (--num_samples)</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  {</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">auto</span> <span class="keyword">const</span> start{MeasureClock::now()};</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  done = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  timer.expires_after(interval);</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  timer.async_wait([&](boost::system::error_code <span class="keyword">const</span>& ec) {</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">if</span> (ec)</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  wait_err = ec;</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">auto</span> <span class="keyword">const</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a>{MeasureClock::now()};</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  elapsed_times_.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/emplace_back.html">emplace_back</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> - start);</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/lock_guard.html">std::lock_guard</a> lk{mtx};</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  done = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  cv.<a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/condition_variable/notify_one.html">notify_one</a>();</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  });</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  cv.<a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/condition_variable/wait.html">wait</a>(mainlock, [&done] { <span class="keywordflow">return</span> done; });</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  }</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  work.reset();</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  worker.join();</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">if</span> (wait_err)</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  boost::asio::detail::throw_error(wait_err, <span class="stringliteral">"wait"</span>);</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  </div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">template</span> <<span class="keyword">class</span> D></div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">auto</span></div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  getMean()</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  {</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordtype">double</span> sum = {0};</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> <span class="keyword">const</span>& v : elapsed_times_)</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  {</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  sum += <span class="keyword">static_cast<</span><span class="keywordtype">double</span><span class="keyword">></span>(</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  std::chrono::duration_cast<D>(v).count());</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  }</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">return</span> sum / elapsed_times_.size();</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  }</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  </div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keyword">template</span> <<span class="keyword">class</span> D></div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keyword">auto</span></div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  getMax()</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  {</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">return</span> std::chrono::duration_cast<D>(</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  *<a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/max_element.html">std::max_element</a>(</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  elapsed_times_.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/begin.html">begin</a>(), elapsed_times_.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/end.html">end</a>()))</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  .count();</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  }</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  </div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keyword">template</span> <<span class="keyword">class</span> D></div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">auto</span></div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  getMin()</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  {</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">return</span> std::chrono::duration_cast<D>(</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  *<a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/min_element.html">std::min_element</a>(</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  elapsed_times_.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/begin.html">begin</a>(), elapsed_times_.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/end.html">end</a>()))</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  .count();</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  }</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  };</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  </div>
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<div class="line"><a name="l00133"></a><span class="lineno"><a class="line" href="structio__latency__probe__test_1_1test__sampler.html"> 133</a></span>  <span class="keyword">struct </span><a class="code" href="structio__latency__probe__test_1_1test__sampler.html">test_sampler</a></div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  {</div>
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<div class="line"><a name="l00135"></a><span class="lineno"><a class="line" href="structio__latency__probe__test_1_1test__sampler.html#a30a9263b73b5f97bf68a0d5333558687"> 135</a></span>  <a class="code" href="classbeast_1_1io__latency__probe.html">beast::io_latency_probe<std::chrono::steady_clock></a> <a class="code" href="structio__latency__probe__test_1_1test__sampler.html#a30a9263b73b5f97bf68a0d5333558687">probe_</a>;</div>
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<div class="line"><a name="l00136"></a><span class="lineno"><a class="line" href="structio__latency__probe__test_1_1test__sampler.html#a3f22012fa788861cb0444706a9df1869"> 136</a></span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector<std::chrono::steady_clock::duration></a> <a class="code" href="structio__latency__probe__test_1_1test__sampler.html#a3f22012fa788861cb0444706a9df1869">durations_</a>;</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  </div>
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<div class="line"><a name="l00138"></a><span class="lineno"><a class="line" href="structio__latency__probe__test_1_1test__sampler.html#a18c959012e533188f520b188aa68978a"> 138</a></span>  <a class="code" href="structio__latency__probe__test_1_1test__sampler.html#a18c959012e533188f520b188aa68978a">test_sampler</a>(</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/chrono/duration.html">std::chrono::milliseconds</a> interval,</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  boost::asio::io_service& ios)</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  : probe_(interval, ios)</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  {</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  }</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  </div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00146"></a><span class="lineno"><a class="line" href="structio__latency__probe__test_1_1test__sampler.html#a42b431a7b398eb4805857f209d986087"> 146</a></span>  <a class="code" href="structio__latency__probe__test_1_1test__sampler.html#a42b431a7b398eb4805857f209d986087">start</a>()</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  {</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  probe_.<a class="code" href="classbeast_1_1io__latency__probe.html#a0d31e25fc6af4e3ed0ff85c82e0a5599">sample</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/functional/ref.html">std::ref</a>(*<span class="keyword">this</span>));</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  </div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00152"></a><span class="lineno"><a class="line" href="structio__latency__probe__test_1_1test__sampler.html#a4b4fa51813d8830f2a1f5cc52357fdf7"> 152</a></span>  <a class="code" href="structio__latency__probe__test_1_1test__sampler.html#a4b4fa51813d8830f2a1f5cc52357fdf7">start_one</a>()</div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  {</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  probe_.<a class="code" href="classbeast_1_1io__latency__probe.html#a583609000bb804d60aa7404f8d01762b">sample_one</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/functional/ref.html">std::ref</a>(*<span class="keyword">this</span>));</div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  }</div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  </div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00158"></a><span class="lineno"><a class="line" href="structio__latency__probe__test_1_1test__sampler.html#a01b7b803a3e01556603ae29217f1012c"> 158</a></span>  <a class="code" href="structio__latency__probe__test_1_1test__sampler.html#a01b7b803a3e01556603ae29217f1012c">operator()</a>(std::chrono::steady_clock::duration <span class="keyword">const</span>& elapsed)</div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  {</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  durations_.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/push_back.html">push_back</a>(elapsed);</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  }</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  };</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  </div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00165"></a><span class="lineno"><a class="line" href="classio__latency__probe__test.html#aedd27f651eaea729c661e6703c74e756"> 165</a></span>  <a class="code" href="classio__latency__probe__test.html#aedd27f651eaea729c661e6703c74e756">testSampleOne</a>(boost::asio::yield_context& yield)</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  {</div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  testcase << <span class="stringliteral">"sample one"</span>;</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  boost::system::error_code ec;</div>
|
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <a class="code" href="structio__latency__probe__test_1_1test__sampler.html">test_sampler</a> io_probe{100ms, get_io_service()};</div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  io_probe.<a class="code" href="structio__latency__probe__test_1_1test__sampler.html#a4b4fa51813d8830f2a1f5cc52357fdf7">start_one</a>();</div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <a class="code" href="classio__latency__probe__test.html#a306f92040b6aa71f94c22aa0dc026430">MyTimer</a> timer{get_io_service(), 1s};</div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  timer.async_wait(yield[ec]);</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">if</span> (!BEAST_EXPECTS(!ec, ec.message()))</div>
|
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">return</span>;</div>
|
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  BEAST_EXPECT(io_probe.durations_.size() == 1);</div>
|
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  io_probe.probe_.cancel_async();</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  }</div>
|
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  </div>
|
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordtype">void</span></div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"><a class="line" href="classio__latency__probe__test.html#ad22f9c95e5db92fba321d43484c2a619"> 180</a></span>  <a class="code" href="classio__latency__probe__test.html#ad22f9c95e5db92fba321d43484c2a619">testSampleOngoing</a>(boost::asio::yield_context& yield)</div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  {</div>
|
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  testcase << <span class="stringliteral">"sample ongoing"</span>;</div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  boost::system::error_code ec;</div>
|
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keyword">using namespace </span><a class="codeRef" href="http://en.cppreference.com/w/namespacestd_1_1chrono.html">std::chrono</a>;</div>
|
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keyword">auto</span> interval = 99ms;</div>
|
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<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keyword">auto</span> probe_duration = 1s;</div>
|
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  </div>
|
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keywordtype">size_t</span> expected_probe_count_max = (probe_duration / interval);</div>
|
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordtype">size_t</span> expected_probe_count_min = expected_probe_count_max;</div>
|
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<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="preprocessor">#ifdef RIPPLED_RUNNING_IN_CI</span></div>
|
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<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="comment">// adjust min expected based on measurements</span></div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="comment">// if running in CI/VM environment</span></div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  measure_asio_timers<steady_clock> tt{interval};</div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/numeric/math/log.html">log</a> << <span class="stringliteral">"measured mean for timers: "</span> << tt.getMean<<a class="codeRef" href="http://en.cppreference.com/w/cpp/chrono/duration.html">milliseconds</a>>()</div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  << <span class="stringliteral">"ms\n"</span>;</div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/numeric/math/log.html">log</a> << <span class="stringliteral">"measured max for timers: "</span> << tt.getMax<<a class="codeRef" href="http://en.cppreference.com/w/cpp/chrono/duration.html">milliseconds</a>>()</div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  << <span class="stringliteral">"ms\n"</span>;</div>
|
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<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  expected_probe_count_min =</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keyword">static_cast<</span><span class="keywordtype">size_t</span><span class="keyword">></span>(</div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  duration_cast<milliseconds>(probe_duration).count()) /</div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keyword">static_cast<</span><span class="keywordtype">size_t</span><span class="keyword">></span>(tt.getMean<<a class="codeRef" href="http://en.cppreference.com/w/cpp/chrono/duration.html">milliseconds</a>>());</div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="preprocessor">#endif</span></div>
|
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<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <a class="code" href="structio__latency__probe__test_1_1test__sampler.html">test_sampler</a> io_probe{interval, get_io_service()};</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  io_probe.<a class="code" href="structio__latency__probe__test_1_1test__sampler.html#a42b431a7b398eb4805857f209d986087">start</a>();</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <a class="code" href="classio__latency__probe__test.html#a306f92040b6aa71f94c22aa0dc026430">MyTimer</a> timer{get_io_service(), probe_duration};</div>
|
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<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  timer.async_wait(yield[ec]);</div>
|
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<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keywordflow">if</span> (!BEAST_EXPECTS(!ec, ec.message()))</div>
|
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<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">return</span>;</div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keyword">auto</span> probes_seen = io_probe.durations_.size();</div>
|
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<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  BEAST_EXPECTS(</div>
|
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<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  probes_seen >= (expected_probe_count_min - 1) &&</div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  probes_seen <= (expected_probe_count_max + 1),</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a>(<span class="stringliteral">"probe count is "</span>) + <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/to_string.html">std::to_string</a>(probes_seen));</div>
|
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<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  io_probe.probe_.cancel_async();</div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="comment">// wait again in order to flush the remaining</span></div>
|
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<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="comment">// probes from the work queue</span></div>
|
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<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  timer.expires_from_now(1s);</div>
|
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<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  timer.async_wait(yield[ec]);</div>
|
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<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  }</div>
|
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  </div>
|
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordtype">void</span></div>
|
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<div class="line"><a name="l00222"></a><span class="lineno"><a class="line" href="classio__latency__probe__test.html#a4721f25541ffef89bc9920eb29c2ede0"> 222</a></span>  <a class="code" href="classio__latency__probe__test.html#a4721f25541ffef89bc9920eb29c2ede0">testCanceled</a>(boost::asio::yield_context& yield)</div>
|
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<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  {</div>
|
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  testcase << <span class="stringliteral">"canceled"</span>;</div>
|
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<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <a class="code" href="structio__latency__probe__test_1_1test__sampler.html">test_sampler</a> io_probe{100ms, get_io_service()};</div>
|
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<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  io_probe.<a class="code" href="structio__latency__probe__test_1_1test__sampler.html#a30a9263b73b5f97bf68a0d5333558687">probe_</a>.<a class="code" href="classbeast_1_1io__latency__probe.html#adaee7525295db67f85573a6b73eff113">cancel_async</a>();</div>
|
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<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  except<std::logic_error>([&io_probe]() { io_probe.start_one(); });</div>
|
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<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  except<std::logic_error>([&io_probe]() { io_probe.start(); });</div>
|
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<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  }</div>
|
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<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  </div>
|
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<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="keyword">public</span>:</div>
|
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<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keywordtype">void</span></div>
|
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<div class="line"><a name="l00233"></a><span class="lineno"><a class="line" href="classio__latency__probe__test.html#ad2481385391e353d016ebc3d43824048"> 233</a></span>  <a class="code" href="classio__latency__probe__test.html#ad2481385391e353d016ebc3d43824048">run</a>()<span class="keyword"> override</span></div>
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="keyword"> </span>{</div>
|
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<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  yield_to([&](boost::asio::yield_context& yield) {</div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  testSampleOne(yield);</div>
|
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  testSampleOngoing(yield);</div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  testCanceled(yield);</div>
|
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<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  });</div>
|
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<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  }</div>
|
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<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> };</div>
|
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<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  </div>
|
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<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <a class="code" href="namespaceripple.html#a2701412a11b118c19256a4c901db2938">BEAST_DEFINE_TESTSUITE</a>(io_latency_probe, asio, <a class="code" href="namespacebeast.html">beast</a>);</div>
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</div><!-- fragment --></div><!-- contents -->
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<div class="ttc" id="astructio__latency__probe__test_1_1test__sampler_html_a42b431a7b398eb4805857f209d986087"><div class="ttname"><a href="structio__latency__probe__test_1_1test__sampler.html#a42b431a7b398eb4805857f209d986087">io_latency_probe_test::test_sampler::start</a></div><div class="ttdeci">void start()</div><div class="ttdef"><b>Definition:</b> <a href="beast__io__latency__probe__test_8cpp_source.html#l00146">beast_io_latency_probe_test.cpp:146</a></div></div>
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<div class="ttc" id="amax_element_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/max_element.html">std::max_element</a></div><div class="ttdeci">T max_element(T... args)</div></div>
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<div class="ttc" id="abasic_string_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a></div><div class="ttdoc">STL class.</div></div>
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<div class="ttc" id="areserve_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/reserve.html">std::vector::reserve</a></div><div class="ttdeci">T reserve(T... args)</div></div>
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<div class="ttc" id="astructio__latency__probe__test_1_1test__sampler_html_a30a9263b73b5f97bf68a0d5333558687"><div class="ttname"><a href="structio__latency__probe__test_1_1test__sampler.html#a30a9263b73b5f97bf68a0d5333558687">io_latency_probe_test::test_sampler::probe_</a></div><div class="ttdeci">beast::io_latency_probe< std::chrono::steady_clock > probe_</div><div class="ttdef"><b>Definition:</b> <a href="beast__io__latency__probe__test_8cpp_source.html#l00135">beast_io_latency_probe_test.cpp:135</a></div></div>
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<div class="ttc" id="aclassio__latency__probe__test_html_aedd27f651eaea729c661e6703c74e756"><div class="ttname"><a href="classio__latency__probe__test.html#aedd27f651eaea729c661e6703c74e756">io_latency_probe_test::testSampleOne</a></div><div class="ttdeci">void testSampleOne(boost::asio::yield_context &yield)</div><div class="ttdef"><b>Definition:</b> <a href="beast__io__latency__probe__test_8cpp_source.html#l00165">beast_io_latency_probe_test.cpp:165</a></div></div>
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<div class="ttc" id="astructio__latency__probe__test_1_1test__sampler_html_a4b4fa51813d8830f2a1f5cc52357fdf7"><div class="ttname"><a href="structio__latency__probe__test_1_1test__sampler.html#a4b4fa51813d8830f2a1f5cc52357fdf7">io_latency_probe_test::test_sampler::start_one</a></div><div class="ttdeci">void start_one()</div><div class="ttdef"><b>Definition:</b> <a href="beast__io__latency__probe__test_8cpp_source.html#l00152">beast_io_latency_probe_test.cpp:152</a></div></div>
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<div class="ttc" id="astructio__latency__probe__test_1_1test__sampler_html_a3f22012fa788861cb0444706a9df1869"><div class="ttname"><a href="structio__latency__probe__test_1_1test__sampler.html#a3f22012fa788861cb0444706a9df1869">io_latency_probe_test::test_sampler::durations_</a></div><div class="ttdeci">std::vector< std::chrono::steady_clock::duration > durations_</div><div class="ttdef"><b>Definition:</b> <a href="beast__io__latency__probe__test_8cpp_source.html#l00136">beast_io_latency_probe_test.cpp:136</a></div></div>
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<div class="ttc" id="astructio__latency__probe__test_1_1test__sampler_html"><div class="ttname"><a href="structio__latency__probe__test_1_1test__sampler.html">io_latency_probe_test::test_sampler</a></div><div class="ttdef"><b>Definition:</b> <a href="beast__io__latency__probe__test_8cpp_source.html#l00133">beast_io_latency_probe_test.cpp:133</a></div></div>
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<div class="ttc" id="alog_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/math/log.html">std::log</a></div><div class="ttdeci">T log(T... args)</div></div>
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<div class="ttc" id="aclassbeast_1_1io__latency__probe_html_a0d31e25fc6af4e3ed0ff85c82e0a5599"><div class="ttname"><a href="classbeast_1_1io__latency__probe.html#a0d31e25fc6af4e3ed0ff85c82e0a5599">beast::io_latency_probe::sample</a></div><div class="ttdeci">void sample(Handler &&handler)</div><div class="ttdoc">Initiate continuous i/o latency sampling.</div><div class="ttdef"><b>Definition:</b> <a href="io__latency__probe_8h_source.html#l00119">io_latency_probe.h:119</a></div></div>
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<div class="ttc" id="aclassbeast_1_1io__latency__probe_html_a583609000bb804d60aa7404f8d01762b"><div class="ttname"><a href="classbeast_1_1io__latency__probe.html#a583609000bb804d60aa7404f8d01762b">beast::io_latency_probe::sample_one</a></div><div class="ttdeci">void sample_one(Handler &&handler)</div><div class="ttdoc">Measure one sample of i/o latency.</div><div class="ttdef"><b>Definition:</b> <a href="io__latency__probe_8h_source.html#l00104">io_latency_probe.h:104</a></div></div>
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<div class="ttc" id="aclassio__latency__probe__test_html_ad22f9c95e5db92fba321d43484c2a619"><div class="ttname"><a href="classio__latency__probe__test.html#ad22f9c95e5db92fba321d43484c2a619">io_latency_probe_test::testSampleOngoing</a></div><div class="ttdeci">void testSampleOngoing(boost::asio::yield_context &yield)</div><div class="ttdef"><b>Definition:</b> <a href="beast__io__latency__probe__test_8cpp_source.html#l00180">beast_io_latency_probe_test.cpp:180</a></div></div>
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<div class="ttc" id="await_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/thread/condition_variable/wait.html">std::condition_variable::wait</a></div><div class="ttdeci">T wait(T... args)</div></div>
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<div class="ttc" id="aclassbeast_1_1io__latency__probe_html"><div class="ttname"><a href="classbeast_1_1io__latency__probe.html">beast::io_latency_probe< std::chrono::steady_clock ></a></div></div>
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<div class="ttc" id="astructio__latency__probe__test_1_1test__sampler_html_a18c959012e533188f520b188aa68978a"><div class="ttname"><a href="structio__latency__probe__test_1_1test__sampler.html#a18c959012e533188f520b188aa68978a">io_latency_probe_test::test_sampler::test_sampler</a></div><div class="ttdeci">test_sampler(std::chrono::milliseconds interval, boost::asio::io_service &ios)</div><div class="ttdef"><b>Definition:</b> <a href="beast__io__latency__probe__test_8cpp_source.html#l00138">beast_io_latency_probe_test.cpp:138</a></div></div>
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<div class="ttc" id="aclassio__latency__probe__test_html_a306f92040b6aa71f94c22aa0dc026430"><div class="ttname"><a href="classio__latency__probe__test.html#a306f92040b6aa71f94c22aa0dc026430">io_latency_probe_test::MyTimer</a></div><div class="ttdeci">boost::asio::basic_waitable_timer< std::chrono::steady_clock > MyTimer</div><div class="ttdef"><b>Definition:</b> <a href="beast__io__latency__probe__test_8cpp_source.html#l00042">beast_io_latency_probe_test.cpp:42</a></div></div>
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<div class="ttc" id="astructio__latency__probe__test_1_1test__sampler_html_a01b7b803a3e01556603ae29217f1012c"><div class="ttname"><a href="structio__latency__probe__test_1_1test__sampler.html#a01b7b803a3e01556603ae29217f1012c">io_latency_probe_test::test_sampler::operator()</a></div><div class="ttdeci">void operator()(std::chrono::steady_clock::duration const &elapsed)</div><div class="ttdef"><b>Definition:</b> <a href="beast__io__latency__probe__test_8cpp_source.html#l00158">beast_io_latency_probe_test.cpp:158</a></div></div>
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<div class="ttc" id="aoptional_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/optional.html">optional</a></div></div>
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<div class="ttc" id="aclassbeast_1_1io__latency__probe_html_adaee7525295db67f85573a6b73eff113"><div class="ttname"><a href="classbeast_1_1io__latency__probe.html#adaee7525295db67f85573a6b73eff113">beast::io_latency_probe::cancel_async</a></div><div class="ttdeci">void cancel_async()</div><div class="ttdef"><b>Definition:</b> <a href="io__latency__probe_8h_source.html#l00091">io_latency_probe.h:91</a></div></div>
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<div class="ttc" id="aref_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/utility/functional/ref.html">std::ref</a></div><div class="ttdeci">T ref(T... args)</div></div>
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