| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
| <html xmlns="http://www.w3.org/1999/xhtml"> |
| <head> |
| <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> |
| <meta http-equiv="X-UA-Compatible" content="IE=9"/> |
| <meta name="generator" content="Doxygen 1.8.6"/> |
| <title>Impala: be/src/util/streaming-sampler.h Source File</title> |
| <link href="tabs.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="jquery.js"></script> |
| <script type="text/javascript" src="dynsections.js"></script> |
| <link href="navtree.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="resize.js"></script> |
| <script type="text/javascript" src="navtree.js"></script> |
| <script type="text/javascript"> |
| $(document).ready(initResizable); |
| $(window).load(resizeHeight); |
| </script> |
| <link href="search/search.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="search/search.js"></script> |
| <script type="text/javascript"> |
| $(document).ready(function() { searchBox.OnSelectItem(0); }); |
| </script> |
| <link href="doxygen.css" rel="stylesheet" type="text/css" /> |
| </head> |
| <body> |
| <div id="top"><!-- do not remove this div, it is closed by doxygen! --> |
| <div id="titlearea"> |
| <table cellspacing="0" cellpadding="0"> |
| <tbody> |
| <tr style="height: 56px;"> |
| <td style="padding-left: 0.5em;"> |
| <div id="projectname">Impala |
| </div> |
| <div id="projectbrief">Impalaistheopensource,nativeanalyticdatabaseforApacheHadoop.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <!-- end header part --> |
| <!-- Generated by Doxygen 1.8.6 --> |
| <script type="text/javascript"> |
| var searchBox = new SearchBox("searchBox", "search",false,'Search'); |
| </script> |
| <div id="navrow1" class="tabs"> |
| <ul class="tablist"> |
| <li><a href="index.html"><span>Main Page</span></a></li> |
| <li><a href="namespaces.html"><span>Namespaces</span></a></li> |
| <li><a href="annotated.html"><span>Classes</span></a></li> |
| <li class="current"><a href="files.html"><span>Files</span></a></li> |
| <li> |
| <div id="MSearchBox" class="MSearchBoxInactive"> |
| <span class="left"> |
| <img id="MSearchSelect" src="search/mag_sel.png" |
| onmouseover="return searchBox.OnSearchSelectShow()" |
| onmouseout="return searchBox.OnSearchSelectHide()" |
| alt=""/> |
| <input type="text" id="MSearchField" value="Search" accesskey="S" |
| onfocus="searchBox.OnSearchFieldFocus(true)" |
| onblur="searchBox.OnSearchFieldFocus(false)" |
| onkeyup="searchBox.OnSearchFieldChange(event)"/> |
| </span><span class="right"> |
| <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a> |
| </span> |
| </div> |
| </li> |
| </ul> |
| </div> |
| <div id="navrow2" class="tabs2"> |
| <ul class="tablist"> |
| <li><a href="files.html"><span>File List</span></a></li> |
| <li><a href="globals.html"><span>File Members</span></a></li> |
| </ul> |
| </div> |
| </div><!-- top --> |
| <div id="side-nav" class="ui-resizable side-nav-resizable"> |
| <div id="nav-tree"> |
| <div id="nav-tree-contents"> |
| <div id="nav-sync" class="sync"></div> |
| </div> |
| </div> |
| <div id="splitbar" style="-moz-user-select:none;" |
| class="ui-resizable-handle"> |
| </div> |
| </div> |
| <script type="text/javascript"> |
| $(document).ready(function(){initNavTree('streaming-sampler_8h_source.html','');}); |
| </script> |
| <div id="doc-content"> |
| <!-- window showing the filter options --> |
| <div id="MSearchSelectWindow" |
| onmouseover="return searchBox.OnSearchSelectShow()" |
| onmouseout="return searchBox.OnSearchSelectHide()" |
| onkeydown="return searchBox.OnSearchSelectKey(event)"> |
| <a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Classes</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Namespaces</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(9)"><span class="SelectionMark"> </span>Friends</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(10)"><span class="SelectionMark"> </span>Macros</a></div> |
| |
| <!-- iframe showing the search results (closed by default) --> |
| <div id="MSearchResultsWindow"> |
| <iframe src="javascript:void(0)" frameborder="0" |
| name="MSearchResults" id="MSearchResults"> |
| </iframe> |
| </div> |
| |
| <div class="header"> |
| <div class="headertitle"> |
| <div class="title">streaming-sampler.h</div> </div> |
| </div><!--header--> |
| <div class="contents"> |
| <a href="streaming-sampler_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2012 Cloudera Inc.</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// See the License for the specific language governing permissions and</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// limitations under the License.</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#ifndef IMPALA_UTIL_STREAMING_SAMPLER_H</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor"></span><span class="preprocessor">#define IMPALA_UTIL_STREAMING_SAMPLER_H</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <string.h></span></div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <iostream></span></div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include "<a class="code" href="spinlock_8h.html">util/spinlock.h</a>"</span></div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">namespace </span>impala {</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keywordtype">int</span> MAX_SAMPLES></div> |
| <div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html"> 32</a></span> <span class="keyword">class </span><a class="code" href="classimpala_1_1StreamingSampler.html">StreamingSampler</a> {</div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">public</span>:</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#ab4e4381eb77d54a761ec55fb293b4a16"> 34</a></span>  <a class="code" href="classimpala_1_1StreamingSampler.html#ab4e4381eb77d54a761ec55fb293b4a16">StreamingSampler</a>(<span class="keywordtype">int</span> initial_period = 500)</div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  : <a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a>(0) ,</div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#a2f0dad474c4deaa8c21e6ae2302f92d1">period_</a>(initial_period),</div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#aebec363f89f7b2c16ad23a6a62b2a50f">current_sample_sum_</a>(0),</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#aa97aae981a54abe19bf18b58c4186571">current_sample_count_</a>(0),</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#ac345c3086fbfc6151ce16ca331735ec3">current_sample_total_time_</a>(0) {</div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  }</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div> |
| <div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#a5089e43e53f322b12701d36fcd00864a"> 43</a></span>  <a class="code" href="classimpala_1_1StreamingSampler.html#a5089e43e53f322b12701d36fcd00864a">StreamingSampler</a>(<span class="keywordtype">int</span> period, <span class="keyword">const</span> std::vector<T>& initial_samples)</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  : <a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a>(initial_samples.size()),</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#a2f0dad474c4deaa8c21e6ae2302f92d1">period_</a>(period),</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#aebec363f89f7b2c16ad23a6a62b2a50f">current_sample_sum_</a>(0),</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#aa97aae981a54abe19bf18b58c4186571">current_sample_count_</a>(0),</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#ac345c3086fbfc6151ce16ca331735ec3">current_sample_total_time_</a>(0) {</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  DCHECK_LE(<a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a>, MAX_SAMPLES);</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  memcpy(<a class="code" href="classimpala_1_1StreamingSampler.html#ab8a150dfe324078822d7eac38ff75f36">samples_</a>, &initial_samples[0], <span class="keyword">sizeof</span>(T) * <a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a>);</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  }</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div> |
| <div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#a853a60d2c09941f91994f3f055a07975"> 61</a></span>  <span class="keywordtype">void</span> <a class="code" href="classimpala_1_1StreamingSampler.html#a853a60d2c09941f91994f3f055a07975">AddSample</a>(T sample, <span class="keywordtype">int</span> ms) {</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  boost::lock_guard<SpinLock> l(<a class="code" href="classimpala_1_1StreamingSampler.html#a9ebd2182092b72c2ef98709fcadb647a">lock_</a>);</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  ++<a class="code" href="classimpala_1_1StreamingSampler.html#aa97aae981a54abe19bf18b58c4186571">current_sample_count_</a>;</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#aebec363f89f7b2c16ad23a6a62b2a50f">current_sample_sum_</a> += sample;</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#ac345c3086fbfc6151ce16ca331735ec3">current_sample_total_time_</a> += ms;</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">if</span> (<a class="code" href="classimpala_1_1StreamingSampler.html#ac345c3086fbfc6151ce16ca331735ec3">current_sample_total_time_</a> >= <a class="code" href="classimpala_1_1StreamingSampler.html#a2f0dad474c4deaa8c21e6ae2302f92d1">period_</a>) {</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#ab8a150dfe324078822d7eac38ff75f36">samples_</a>[<a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a>++] = <a class="code" href="classimpala_1_1StreamingSampler.html#aebec363f89f7b2c16ad23a6a62b2a50f">current_sample_sum_</a> / <a class="code" href="classimpala_1_1StreamingSampler.html#aa97aae981a54abe19bf18b58c4186571">current_sample_count_</a>;</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#aa97aae981a54abe19bf18b58c4186571">current_sample_count_</a> = 0;</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#aebec363f89f7b2c16ad23a6a62b2a50f">current_sample_sum_</a> = 0;</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#ac345c3086fbfc6151ce16ca331735ec3">current_sample_total_time_</a> = 0;</div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">if</span> (<a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a> == MAX_SAMPLES) {</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#a2f0dad474c4deaa8c21e6ae2302f92d1">period_</a> *= 2;</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < MAX_SAMPLES / 2; ++i) {</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#ab8a150dfe324078822d7eac38ff75f36">samples_</a>[i] = (<a class="code" href="classimpala_1_1StreamingSampler.html#ab8a150dfe324078822d7eac38ff75f36">samples_</a>[i * 2] + <a class="code" href="classimpala_1_1StreamingSampler.html#ab8a150dfe324078822d7eac38ff75f36">samples_</a>[i * 2 + 1]) / 2;</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  }</div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a> /= 2;</div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  }</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  }</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  }</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div> |
| <div class="line"><a name="l00088"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#a13ef3347e6f4772e50e52aa7bcbfd98a"> 88</a></span>  <span class="keyword">const</span> T* <a class="code" href="classimpala_1_1StreamingSampler.html#a13ef3347e6f4772e50e52aa7bcbfd98a">GetSamples</a>(<span class="keywordtype">int</span>* num_samples, <span class="keywordtype">int</span>* period, <a class="code" href="classimpala_1_1SpinLock.html">SpinLock</a>** lock = NULL)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">if</span> (lock != NULL) {</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#a9ebd2182092b72c2ef98709fcadb647a">lock_</a>.<a class="code" href="classimpala_1_1SpinLock.html#ad65f0b82396ed5c56cd62cddd337569a">lock</a>();</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  *lock = &<a class="code" href="classimpala_1_1StreamingSampler.html#a9ebd2182092b72c2ef98709fcadb647a">lock_</a>;</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  }</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  *num_samples = <a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a>;</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  *period = <a class="code" href="classimpala_1_1StreamingSampler.html#a2f0dad474c4deaa8c21e6ae2302f92d1">period_</a>;</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">return</span> <a class="code" href="classimpala_1_1StreamingSampler.html#ab8a150dfe324078822d7eac38ff75f36">samples_</a>;</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div> |
| <div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#adb5d140b0d455c14673006bbc1954184"> 99</a></span>  <span class="keywordtype">void</span> <a class="code" href="classimpala_1_1StreamingSampler.html#adb5d140b0d455c14673006bbc1954184">SetSamples</a>(<span class="keywordtype">int</span> period, <span class="keyword">const</span> std::vector<T>& samples) {</div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  DCHECK_LE(samples.size(), MAX_SAMPLES);</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  boost::lock_guard<SpinLock> l(<a class="code" href="classimpala_1_1StreamingSampler.html#a9ebd2182092b72c2ef98709fcadb647a">lock_</a>);</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#a2f0dad474c4deaa8c21e6ae2302f92d1">period_</a> = period;</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a> = samples.size();</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  memcpy(<a class="code" href="classimpala_1_1StreamingSampler.html#ab8a150dfe324078822d7eac38ff75f36">samples_</a>, &samples[0], <span class="keyword">sizeof</span>(T) * <a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a>);</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#aebec363f89f7b2c16ad23a6a62b2a50f">current_sample_sum_</a> = 0;</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#aa97aae981a54abe19bf18b58c4186571">current_sample_count_</a> = 0;</div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <a class="code" href="classimpala_1_1StreamingSampler.html#ac345c3086fbfc6151ce16ca331735ec3">current_sample_total_time_</a> = 0;</div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  }</div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div> |
| <div class="line"><a name="l00111"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#a4cb101f4fec78bff4ab4498b4a2a1c89"> 111</a></span>  std::string <a class="code" href="classimpala_1_1StreamingSampler.html#a4cb101f4fec78bff4ab4498b4a2a1c89">DebugString</a>(<span class="keyword">const</span> std::string& prefix=<span class="stringliteral">""</span>)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  boost::lock_guard<SpinLock> l(<a class="code" href="classimpala_1_1StreamingSampler.html#a9ebd2182092b72c2ef98709fcadb647a">lock_</a>);</div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  std::stringstream ss;</div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  ss << prefix << <span class="stringliteral">"Period = "</span> << <a class="code" href="classimpala_1_1StreamingSampler.html#a2f0dad474c4deaa8c21e6ae2302f92d1">period_</a> << std::endl</div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  << prefix << <span class="stringliteral">"Num = "</span> << <a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a> << std::endl</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  << prefix << <span class="stringliteral">"Samples = {"</span>;</div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a>; ++i) {</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  ss << <a class="code" href="classimpala_1_1StreamingSampler.html#ab8a150dfe324078822d7eac38ff75f36">samples_</a>[i] << <span class="stringliteral">", "</span>;</div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  }</div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  ss << prefix << <span class="stringliteral">"}"</span> << std::endl;</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">return</span> ss.str();</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  }</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keyword">private</span>:</div> |
| <div class="line"><a name="l00125"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#a9ebd2182092b72c2ef98709fcadb647a"> 125</a></span>  <span class="keyword">mutable</span> <a class="code" href="classimpala_1_1SpinLock.html">SpinLock</a> <a class="code" href="classimpala_1_1StreamingSampler.html#a9ebd2182092b72c2ef98709fcadb647a">lock_</a>;</div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div> |
| <div class="line"><a name="l00129"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#ab8a150dfe324078822d7eac38ff75f36"> 129</a></span>  T <a class="code" href="classimpala_1_1StreamingSampler.html#ab8a150dfe324078822d7eac38ff75f36">samples_</a>[MAX_SAMPLES];</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div> |
| <div class="line"><a name="l00132"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb"> 132</a></span>  <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">samples_collected_</a>;</div> |
| <div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div> |
| <div class="line"><a name="l00135"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#a2f0dad474c4deaa8c21e6ae2302f92d1"> 135</a></span>  <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1StreamingSampler.html#a2f0dad474c4deaa8c21e6ae2302f92d1">period_</a>;</div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div> |
| <div class="line"><a name="l00138"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#aebec363f89f7b2c16ad23a6a62b2a50f"> 138</a></span>  T <a class="code" href="classimpala_1_1StreamingSampler.html#aebec363f89f7b2c16ad23a6a62b2a50f">current_sample_sum_</a>;</div> |
| <div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div> |
| <div class="line"><a name="l00141"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#aa97aae981a54abe19bf18b58c4186571"> 141</a></span>  <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1StreamingSampler.html#aa97aae981a54abe19bf18b58c4186571">current_sample_count_</a>;</div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div> |
| <div class="line"><a name="l00144"></a><span class="lineno"><a class="line" href="classimpala_1_1StreamingSampler.html#ac345c3086fbfc6151ce16ca331735ec3"> 144</a></span>  <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1StreamingSampler.html#ac345c3086fbfc6151ce16ca331735ec3">current_sample_total_time_</a>;</div> |
| <div class="line"><a name="l00145"></a><span class="lineno"> 145</span> };</div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span> }</div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="preprocessor">#endif</span></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_ab4e4381eb77d54a761ec55fb293b4a16"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#ab4e4381eb77d54a761ec55fb293b4a16">impala::StreamingSampler::StreamingSampler</a></div><div class="ttdeci">StreamingSampler(int initial_period=500)</div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00034">streaming-sampler.h:34</a></div></div> |
| <div class="ttc" id="classimpala_1_1SpinLock_html"><div class="ttname"><a href="classimpala_1_1SpinLock.html">impala::SpinLock</a></div><div class="ttdoc">Lightweight spinlock. </div><div class="ttdef"><b>Definition:</b> <a href="spinlock_8h_source.html#l00024">spinlock.h:24</a></div></div> |
| <div class="ttc" id="spinlock_8h_html"><div class="ttname"><a href="spinlock_8h.html">spinlock.h</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html">impala::StreamingSampler</a></div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00032">streaming-sampler.h:32</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_ab8a150dfe324078822d7eac38ff75f36"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#ab8a150dfe324078822d7eac38ff75f36">impala::StreamingSampler::samples_</a></div><div class="ttdeci">T samples_[MAX_SAMPLES]</div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00129">streaming-sampler.h:129</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_a86c0e9be3346828585b988ae09cd97bb"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#a86c0e9be3346828585b988ae09cd97bb">impala::StreamingSampler::samples_collected_</a></div><div class="ttdeci">int samples_collected_</div><div class="ttdoc">Number of samples collected <= MAX_SAMPLES. </div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00132">streaming-sampler.h:132</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_a2f0dad474c4deaa8c21e6ae2302f92d1"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#a2f0dad474c4deaa8c21e6ae2302f92d1">impala::StreamingSampler::period_</a></div><div class="ttdeci">int period_</div><div class="ttdoc">Storage period in ms. </div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00135">streaming-sampler.h:135</a></div></div> |
| <div class="ttc" id="classimpala_1_1SpinLock_html_ad65f0b82396ed5c56cd62cddd337569a"><div class="ttname"><a href="classimpala_1_1SpinLock.html#ad65f0b82396ed5c56cd62cddd337569a">impala::SpinLock::lock</a></div><div class="ttdeci">void lock()</div><div class="ttdoc">Acquires the lock, spins until the lock becomes available. </div><div class="ttdef"><b>Definition:</b> <a href="spinlock_8h_source.html#l00029">spinlock.h:29</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_ac345c3086fbfc6151ce16ca331735ec3"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#ac345c3086fbfc6151ce16ca331735ec3">impala::StreamingSampler::current_sample_total_time_</a></div><div class="ttdeci">int current_sample_total_time_</div><div class="ttdoc">The total time that current_sample_sum_ represents. </div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00144">streaming-sampler.h:144</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_aa97aae981a54abe19bf18b58c4186571"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#aa97aae981a54abe19bf18b58c4186571">impala::StreamingSampler::current_sample_count_</a></div><div class="ttdeci">int current_sample_count_</div><div class="ttdoc">The number of input samples that contribute to current_sample_sum_. </div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00141">streaming-sampler.h:141</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_adb5d140b0d455c14673006bbc1954184"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#adb5d140b0d455c14673006bbc1954184">impala::StreamingSampler::SetSamples</a></div><div class="ttdeci">void SetSamples(int period, const std::vector< T > &samples)</div><div class="ttdoc">Set the underlying data to period/samples. </div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00099">streaming-sampler.h:99</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_a13ef3347e6f4772e50e52aa7bcbfd98a"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#a13ef3347e6f4772e50e52aa7bcbfd98a">impala::StreamingSampler::GetSamples</a></div><div class="ttdeci">const T * GetSamples(int *num_samples, int *period, SpinLock **lock=NULL) const </div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00088">streaming-sampler.h:88</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_aebec363f89f7b2c16ad23a6a62b2a50f"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#aebec363f89f7b2c16ad23a6a62b2a50f">impala::StreamingSampler::current_sample_sum_</a></div><div class="ttdeci">T current_sample_sum_</div><div class="ttdoc">The sum of input samples that makes up the next stored sample. </div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00138">streaming-sampler.h:138</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_a853a60d2c09941f91994f3f055a07975"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#a853a60d2c09941f91994f3f055a07975">impala::StreamingSampler::AddSample</a></div><div class="ttdeci">void AddSample(T sample, int ms)</div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00061">streaming-sampler.h:61</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_a5089e43e53f322b12701d36fcd00864a"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#a5089e43e53f322b12701d36fcd00864a">impala::StreamingSampler::StreamingSampler</a></div><div class="ttdeci">StreamingSampler(int period, const std::vector< T > &initial_samples)</div><div class="ttdoc">Initialize the sampler with values. </div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00043">streaming-sampler.h:43</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_a4cb101f4fec78bff4ab4498b4a2a1c89"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#a4cb101f4fec78bff4ab4498b4a2a1c89">impala::StreamingSampler::DebugString</a></div><div class="ttdeci">std::string DebugString(const std::string &prefix="") const </div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00111">streaming-sampler.h:111</a></div></div> |
| <div class="ttc" id="classimpala_1_1StreamingSampler_html_a9ebd2182092b72c2ef98709fcadb647a"><div class="ttname"><a href="classimpala_1_1StreamingSampler.html#a9ebd2182092b72c2ef98709fcadb647a">impala::StreamingSampler::lock_</a></div><div class="ttdeci">SpinLock lock_</div><div class="ttdef"><b>Definition:</b> <a href="streaming-sampler_8h_source.html#l00125">streaming-sampler.h:125</a></div></div> |
| </div><!-- fragment --></div><!-- contents --> |
| </div><!-- doc-content --> |
| <!-- start footer part --> |
| <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> |
| <ul> |
| <li class="navelem"><a class="el" href="dir_e5d120be6b5e8a44336cbfd013b25604.html">be</a></li><li class="navelem"><a class="el" href="dir_68cf7cafb51a962d5bc4848b83cab0de.html">src</a></li><li class="navelem"><a class="el" href="dir_6939c8639261a9303da2cde491b82898.html">util</a></li><li class="navelem"><a class="el" href="streaming-sampler_8h.html">streaming-sampler.h</a></li> |
| <li class="footer">Generated on Thu May 7 2015 16:10:38 for Impala by |
| <a href="http://www.doxygen.org/index.html"> |
| <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.6 </li> |
| </ul> |
| </div> |
| </body> |
| </html> |
