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author Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
date Tue, 10 Dec 2013 15:25:07 +0900
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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1 <!DOCTYPE html>
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2
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3 <!--
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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4 Google HTML5 slide template
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5
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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6 Authors: Luke Mahé (code)
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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7 Marcin Wichary (code and design)
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8
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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9 Dominic Mazzoni (browser compatibility)
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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10 Charles Chen (ChromeVox support)
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11
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12 URL: http://code.google.com/p/html5slides/
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13 -->
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14
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15 <html>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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16 <head>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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17 <title>2013-11-19</title>
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18
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19 <meta charset='utf-8'>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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20 <script
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21 src='http://html5slides.googlecode.com/svn/trunk/slides.js'></script>
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22 </head>
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23
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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24 <style>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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25 /* Your individual styles here, or just use inline styles if that’s
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26 what you want. */
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27 .slides article { background-image: none !important; background-color: white; }
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28
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29 </style>
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30
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31 <body style='display: none'>
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32
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33 <section class='slides layout-regular template-default'>
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34
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35 <!-- Your slides (<article>s) go here. Delete or comment out the
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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36 slides below.-->
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37
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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38 <article>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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39 <h1>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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40 Cerium Task Manager
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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41 <br>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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42 による正規表現の実装
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43 </h1>
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44 <p>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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45 Masataka Kohagura
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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46 <br>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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47 19th November , 2013
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48 </p>
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49 </article>
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50
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51 <article>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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52 <h3>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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53 研究目的
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54 </h3>
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55 <p>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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56 マルチコア CPU を最大限に活かすためには、並列プログラミングによる並列度を向上させなければならないが、実装が難しい。
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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57 当研究室では Cerium Libraryを提供することによって並列プログラミングを容易にしているが、ファイル読み込み等のI/O部分に関してはまだ実装されていない。
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58 </p>
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59 <p>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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60 本研究ではその例題として正規表現を実装し、I/Oの並列化の設計・実装によって既存の正規表現の処理速度、処理効率を上げる。
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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61 </p>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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62 </article>
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63
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64 <article>
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65 <h3>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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66 今週のしたこと
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67 </h3>
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68 <p>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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69 ・検索文字列のハードコーディングの脱却<br>
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70 (set_inData,get_input絡みでバグ??)
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71 </p>
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72 </article>
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73
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74 <!--
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75 <article class='smaller'>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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76 <h3>I/O並列化のシーケンス図(mmap)</h3>
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77 <div align="center">
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78 <IMG SRC="mmap.png">
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79 </div>
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80 <li>
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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81 codeがシンプル(readを書いて読み込まなくていいため)
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82 </li>
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83 <li>
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84 memoryより大きなファイルは開けない
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85 </li>
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86 <li>
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87 readの先読みがOS依存
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88 </li>
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89
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90 </article>
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91 -->
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92
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93
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94 <article>
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95 <h3>
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96 WordCount.h
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97 </h3>
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98 <section><pre>
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99 typedef struct wordCount {
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100 struct wordCount *self;
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101 int size; // remaining file size
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102 int division_size; // for each word count task
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103 (中略)
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104 <font color="red"> unsigned char *search_word;
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105 int search_word_len;</font>
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106 HTaskPtr t_print;
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107 } WordCount;
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108 </pre></section>
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109 </article>
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110
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111 <article>
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112 <h3>
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113 main.cc(task生成部分)
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114 </h3>
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115 <section><pre>
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116 run_tasks(SchedTask *manager,…)
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117 {
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118 …
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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119 if(size != w->size){ //最後のタスクかどうかの判定
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120 t_exec[k]->set_param(0,&set_one_task_length + EXTRA_LENGTH);
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121 t_exec[k]->set_inData(0,w->file_mmap + a*w->division_size, size+EXTRA_LENGTH);
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122 <font color="red">t_exec[k]->set_inData(1,w->search_word, w->search_word_len); </font>
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123 }else{
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124 t_exec[k]->set_param(0,&set_one_task_length);
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125 t_exec[k]->set_inData(0,w->file_mmap + a*w->division_size, size);
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126 <font color="red">t_exec[k]->set_inData(1,w->search_word, w->search_word_len); </font>
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127 }
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128 …
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129 }
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130 </pre></section>
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131
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132 </article>
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133
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134
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135 <article>
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136 <h3>
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137 main.cc(task生成部分)
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138 </h3>
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139 <section><pre>
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140 run_tasks(SchedTask *manager,…)
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141 {
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142 …
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143 if(size != w->size){ //最後のタスクかどうかの判定
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144 t_exec[k]->set_param(0,&set_one_task_length + EXTRA_LENGTH);
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145 t_exec[k]->set_inData(0,w->file_mmap + a*w->division_size, size+EXTRA_LENGTH);
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146 <font color="red">t_exec[k]->set_inData(1,w->search_word, w->search_word_len); </font>
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147 }else{
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148 t_exec[k]->set_param(0,&set_one_task_length);
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149 t_exec[k]->set_inData(0,w->file_mmap + a*w->division_size, size);
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150 <font color="red">t_exec[k]->set_inData(1,w->search_word, w->search_word_len); </font>
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151 }
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152 …
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153 }
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154 </pre></section>
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155
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156 </article>
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157
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158 <article>
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159 <h3>
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160 問題点
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161 </h3>
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162 <li>
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163 複数の文字列をタスクに渡そうとすると、最初に渡す文字列に関しては渡せるが、後に渡す文字列がうまく渡らない。
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164 </li>
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165 <p>Exec.cc(get_input)</p>
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166 <section><pre>
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167 run(SchedTask *s, void *rbuf, void *wbuf)
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168 {
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169 unsigned char *i_data = (unsigned char *)s->get_input(rbuf,0);
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170 unsigned char *search_word = (unsigned char*)s->get_input(rbuf,1);
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171 …
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172 s->printf("[i_data]\n%s\n",i_data);
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173 s->printf("[search_word]\n%s\n",search_word);
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174
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175 return 0;
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176 }
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177 </pre></section>
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178
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179 <p>result</p>
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180 <section><pre>
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181 (lldb) p i_data
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182 (unsigned char *) $2 = 0x000000010202ca00 "aaa bbb …"
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183 (lldb) p search_word
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184 (unsigned char *) $3 = 0x000000010202ca00 "aaa bbb …"
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185 </pre></section>
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186 <li>文字列を複数受け取ろうとすると、index(1)のアドレスがindex(0)のアドレスと同じ場所を示す</li>
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187 <li>この時のi_data sizeは8byte、search_word sizeは6Byteである。</li>
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188 <li>i_data size = search_word sizeにしても同様</li>
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189
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190 </article>
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191
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192 </body>
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193 </html>