Mercurial > hg > Papers > 2014 > masakoha-thesis > final

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author Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
date Tue, 11 Feb 2014 20:08:48 +0900
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1 <!DOCTYPE html>
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3 <html>
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4 <head>
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5 <title>Presentation</title>
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7 <meta charset='utf-8'>
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8 <script
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9 src='./slides.js'></script>
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10 </head>
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12 <style>
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13 /* Your individual styles here, or just use inline styles if that’s
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14 what you want. */
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16 </style>
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18 <body style='display: none'>
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19 <section class='slides layout-regular template-default'>
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21 <!--
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22 Your slides (<article>s) go here. Delete or comment out the
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23 slides below.
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24 -->
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25 <article >
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26 <h1>Cerium による並列処理向け I/O の設計と実装</h1>
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27 <h3 class="title">Masataka Kohagura 12th, February</h3>
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28 <div align="right">担当教官 : 河野 真治</div>
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29 </article>
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30
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31 <article class='smaller'>
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32 <h3>研究背景と目的</h3>
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33 <p>
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34 近年のCPUのほとんどはマルチコアであり、それらの性能を引き出すためには並列プログラミングが必須となっている。
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35 そこで当研究室では、並列プログラミング用フレームワーク、Cerium Task Manager の開発を行い、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。
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36 </p>
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37 <p>
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38 先行研究では Task の並列化によって、プログラム全体の処理速度は向上している。しかし、ファイル読み込み等の I/O と Task が並列に動作するようにはされていない。
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39 </p>
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40 <p>
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41 現状では、ファイルを memory に mapping を行ってから Task が走るようになっているので、I/O と Task が並列に動作しない。
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42 </p>
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43 <p>
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44 本研究では I/O と Task が並列に動作するような設計、実装によってプログラム全体の
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45 並列度、及び処理速度を上げていく。
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46 </p>
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47 </article>
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50 <article>
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51 <h3>mmapでの実装の問題点</h3>
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52 <ul>
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53 <li>
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54 mmap で file を読み込むと、file は memory 上にて即座には展開されない。
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55 </li>
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56 <li>
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57 file が memory に展開されるタイミングは、その file に対して何らかの計算を行うときである。<br><br>
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58 →つまり、Task が走るときに初めて memory に file を格納するので、I/O と Task が分離できない。
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59 </li>
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60 </ul>
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61 </article>
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63 <!--
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64 <article>
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65 <h3>Cerium Task Manager の流れ</h3>
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66 <table border="0" cellpadding="0" cellspacing="0">
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67 <tbody>
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68 <tr>
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69 <td><img src='images/cerium.png' style="height:350px"></td>
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70 <td>
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71 <ol>
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72 <font size=5>
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73 <li>Taskを生成後、Task Managerにて Task の管理、依存関係のチェック</li>
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74 <li>TaskList に生成された Task を set </li>
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75 <li>Task を各 Scheduler に転送</li>
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76 <li>並列実行</li>
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77 </font>
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78 </ol>
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79 </td>
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80 </tr>
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81 </tbody>
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82 </table>
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83 </article>
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84 -->
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85
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86 <article>
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87 <h3>並列処理向け I/O の 設計と実装</h3>
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88 <br>
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89 <ul>
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90 <li>I/O を含む Task の説明</li>
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91 <li>mmap の説明</li>
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92 <li>Blocked Read の設計と実装</li>
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93 <<<<<<< local
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94 <li>IO専用 therad の追加</li>
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95 =======
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96 >>>>>>> other
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97 <li>ベンチマーク</li>
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98 </ul>
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99 </article>
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100
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101 <article>
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102 <h3>I/O を含む Task の説明</h3>
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103 <br>
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104 <img src='images/includeIOTask.png' style="height:250px">
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105 <ol>
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106 <li>file mapping 後、file をある一定の大きさに分割する</li>
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107 <li>分割した file に対して、それぞれ計算を行う</li>
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108 <li>計算した結果を集計する</li>
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109 </ol>
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110 </article>
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111
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112 <<<<<<< local
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113 =======
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114
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115 >>>>>>> other
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116 <article>
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117 <h3>mmap の説明</h3>
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118 <table border="0" cellpadding="0" cellspacing="0">
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119 <tbody>
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120 <tr>
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121 <td><img src='images/mmap.png' style="height:350px"></td>
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122 <td>
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123 <ul>
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124 <font size = 5>
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125 <li>
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126 code がシンプル (memory を自分自身で malloc せず、read を書いて読み込まなくていいため)
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127 </li>
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128 <li>
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129 memory より大きなファイルは開けない
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130 </li>
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131 <li>
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132 read の先読みがOS依存
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133 </li>
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134 <li>
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135 mmap した領域に対して何らかの処理が行われた時に memory に読み込まれる
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136 </li>
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137 </font>
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138 </ul>
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139 </td>
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140 </tr>
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141 </tbody>
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142 </table>
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143
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144 <ul>
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145 </ul>
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146 </article>
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147
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148 <article>
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149 <h3>Blocked Read の設計</h3>
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150 <br>
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151 <img src='images/divide_read.png' style="height:250px">
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152 <br>
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153
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154 <ul>
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155 <li>
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156 明示的な read
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157 </li>
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158 <li>
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159 先読みを自分で書ける(制御できる)
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160 </li>
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161 <li>
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162 memory より大きなファイルを扱える
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163 </li>
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164 </ul>
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165 </article>
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166
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167 <!--
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168 <article>
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169 <h3>divide read の実装(1)</h3>
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170 <br>
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171 <h3 class="yellow">Read Task の ブロック化</h3>
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172 <pre>
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173 program_run(TaskManager *manager, char *filename)
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174 {
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175 FileReadPtr fr = (FileReadPtr)manager->allocate(sizeof(FileRead));
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176 fr->self = fr;
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177 fr->fd = fd;
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178 ・・・
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179 read = manager->create_task(RUN_READ_BLOCKS,
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180 (memaddr)&fr->self, sizeof(memaddr),read_text,fr->filesize);
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181
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182 read->spawn();
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183 }
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184 </pre>
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185 </article>
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186
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187 <article>
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188 <h3>divide read の実装(2)</h3>
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189 <br>
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190 <ul>
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191 <li>
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192 divide read Task の実行の際に、ブロック単位で Task の生成、実行を行う。
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193 </li>
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194 <li>
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195 1つずつ生成すると Task の数だけ memory address が取られるために肥大化してしまう。
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196 </li>
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197 <li>
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198 しかしブロック単位で生成すると、同じ変数を使用しているので memory の節約になる。
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199 </li>
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200
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201 </li>
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202 </ul>
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203 </article>
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204 -->
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205
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206 <<<<<<< local
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207 <article class='smaller'>
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208 <h3>Blocked Read の実装</h3>
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209 <br>
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210 <img src='images/blockread.png' style="height:250px">
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211 <br>
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212
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213 <ul>
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214 <li>
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215 Task を 1 つずつ生成するのではなく、ブロック単位で生成する。<br>
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216 この図では、1 Block 当たり n 個の Task を生成する。<br>
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217 (1つずつ生成すると、生成された Task で memory を圧迫するため)
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218 </li>
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219 <li>
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220 Task 1つ当たりの読み込む領域を L とする。<br>
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221 Blocked Read Task 1つ当たり、memory に格納する大きさは L × n となる。
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222 </li>
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223 <li>
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224 Blocked Read Task が読み込み終わるまで、Task Block に wait を掛ける。<br>
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225 (Read Task が格納する前に走ると、まだ格納していない領域を読みこんでしまう。)
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226 </li>
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227 </ul>
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228 </article>
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229
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230 <article class = 'smaller'>
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231 <h3>I/O 専用の therad を追加 (1/2)</h3>
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232 <br>
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233 <img src='images/SPEANYblockread.png' style="height:400px">
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234 <ol>
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235 <li>file mapping 後、file をある一定の大きさに分割する</li>
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236 <li>分割した file に対して、それぞれ計算を行う</li>
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237 <li>計算した結果を集計する</li>
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238 </ol>
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239 </article>
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240
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241 <article>
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242 <h3>I/O 専用の therad を追加 (2/2)</h3>
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243 <br>
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244 <img src='images/IO0blockread.png' style="height:250px">
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245 <ol>
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246 <li>file mapping 後、file をある一定の大きさに分割する</li>
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247 <li>分割した file に対して、それぞれ計算を行う</li>
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248 <li>計算した結果を集計する</li>
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249 </ol>
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250 </article>
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251
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252 <article>
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253 <h3>ベンチマーク(1/3)</h3>
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254 <br>
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255 <h3 class="yellow">実験環境</h3>
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256 <ul>
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257 <li> Mac OS X 10.9.1</li>
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258 <li> 2*2.66 GHz 6-Core Intel Xeon</li>
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259 <li> Memory 16GB 1333MHz DDR3</li>
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260 <li> HHD 1TB</li>
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261 <li> file size : 約 10 GB</li>
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262 <li>
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263 "doing" という文字列が file 内にいくつあるか計算<br>
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264 ("doing" は 25,961,792 個存在する)
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265 </li>
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266 </ul>
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267 </article>
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268
26
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269 <article class = 'smaller'>
27
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270 <h3>ベンチマーク(2/3)</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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271 <ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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272 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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273 file が memory に残っていない状態での測定
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
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274 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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275 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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276 one task size 128KByte
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
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277 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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278 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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279 Task Blocks 48
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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280 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
281 </ul>
26
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282 <br>
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283 <h3 class="yellow">結果</h3>
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284 <table border="0" cellpadding="0" cellspacing="0">
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285 <tbody>
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286 <tr>
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287 <td>read mode</td>
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288 <td>cpu num</td>
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289 <td>min time(s)</td>
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290 <td>MAX time(s)</td>
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291 <td>ave time(s)</td>
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parents: 25
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292 </tr>
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293 <tr>
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294 <td>mmap</td>
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295 <td>4</td>
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296 <td>135.2</td>
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297 <td>148.9</td>
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298 <td>142.3</td>
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299 </tr>
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300 <tr>
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301 <td>BRead</td>
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302 <td>4</td>
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303 <td>94.5</td>
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304 <td>109.2</td>
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305 <td>98.8</td>
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306 </tr>
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307
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308 <tr>
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309 <td>mmap</td>
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310 <td>12</td>
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311 <td>147.0</td>
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312 <td>181.8</td>
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313 <td>154.6</td>
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314 </tr>
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315 <tr>
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316 <td>BRead</td>
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317 <td>12</td>
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318 <td>91.6</td>
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319 <td>117.5</td>
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320 <td>99.2</td>
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321 </tr>
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322 </tbody>
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323 </table>
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324
27
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325 </article>
26
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326
28
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327
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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328 <article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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329 <h3>まとめ</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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330 <br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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331 <ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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332 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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333 mmap より、Blocked Readのほうが % ほど速くなった
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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334 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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335 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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336 I/O と Task の分離が成功した
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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337 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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338 </ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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339
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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340 </article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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341
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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342 <article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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343 <h3>大学院に進学してしたいこと</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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344 <br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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345 <ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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346 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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347 さらなる 並列処理向け I/O の動作を改善
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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348 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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349 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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350 I/O を利用した、マルチコアソフトウェアシンセサイザーを設計
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351 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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352 </ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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353
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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354 </article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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355
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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356
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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357 <article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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358 <h3>大学院に進学してしたいこと</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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359 <br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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360 <ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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361 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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362 さらなる 並列処理向け I/O の動作を改善
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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363 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
364 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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365 I/O を利用した、マルチコアソフトウェアシンセサイザーを設計
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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366 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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367 </ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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368
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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369 </article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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370
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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371 <article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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372 <h3>マルチコアソフトウェアシンセサイザーの設計</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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373 <br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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374 <ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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375 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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376 作曲をする際にはマシンパワーが必要となることが多い。
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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377 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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378 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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379 ソフトウェアシンセサイザー(以下、シンセサイザー)を使用する際にマシンパワーが必要となる。
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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380 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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381 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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382 シンセサイザーは1つだけで立ち上げる物ではなく、複数立ち上げる物なので、1つ1つの負荷を抑えることがキーポイントとなる。
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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383 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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384 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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385 シンセサイザーは様々なフィルターをかけることで音を作っていくのだが、フィルターを重ねても動作軽量なプログラムを作る。
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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386 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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387 </ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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388 </article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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389
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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390 <article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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391 <h3>付録 : Cerium Task の生成の例(1)</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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392 <p>(例題) multiply : 2つの数を掛け算するプログラム</p>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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393 <h3 class="yellow">main.cc の記述</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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394 <pre>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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395 float* A, B, C;
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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396 // Task の宣言
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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397 HTaskPtr multiply = manager->create_task(MULTIPLY_TASK);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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398 // Task を実行する デバイスの設定
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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399 multiply->set_cpu(SPE_ANY);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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400 // Task に入力データのアドレスを追加
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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401 multiply->set_inData(0, (memaddr)A, sizeof(float)*length);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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402 multiply->set_inData(1, (memaddr)B, sizeof(float)*length);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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403 // Task に出力データのアドレスを追加
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
404 multiply->set_outData(0, (memaddr)C, sizeof(float)*length);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
405 // Task へ値を1つだけ渡す
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
406 multiply->set_param(0,length);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
407 // Task を TaskList に set する
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
408 multiply->spawn(); </pre>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
409 </article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
410
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
411 <article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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412 <h3>付録 : Cerium Task の生成(2)</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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413 <br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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414 <h3 class="yellow">Task の記述</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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415 <pre>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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416 static int
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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417 multiply(SchedTask *s,void *rbuf, void *wbuf)
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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418 {
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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419 float *A,*B,*C
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
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diff changeset
420 // 登録した inData を取得
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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421 A = (float*)s->get_input(rbuf,0);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
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422 B = (float*)s->get_input(rbuf,1);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
423 // 登録した outData を取得
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
424 C = (float*)s->get_output(wbuf,0);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
425 // 登録した param を取得
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
426 long length=(long)s->get_param(0);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
427 for (int i=0;i &lt; length;i++) {
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
428 C[i] = A[i] * B[i];
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
429 }
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
430 return 0;
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
431 } </pre>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
432 </article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
433
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
434 <article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
435 <h3>付録 : mmap での I/O の実装</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
436 <br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
437 <h3 class="yellow">mmap の記述</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
438 <pre>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
439 mmap(SchedTask *s, void *in, void *out)
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
440 {
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
441 // FileReadPtr : File情報などを格納している構造体
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
442 FileReadPtr fr = (FileReadPtr)in;
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
443 int map = MAP_PRIVATE;
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
444
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
445 fr->read_text =
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
446 (char*)mmap(NULL,fr->filesize,PROT_READ,map,fr->fd,(off_t)0);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
447 }
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
448 </pre>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
449 <ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
450 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
451 PROT_READ : 読み込み可
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
452 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
453 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
454 MAP_PRIVATE : 読み込んだ領域に対して書き込みが起こると複製し、複製した領域に対して書き込みを行う
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
455 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
456 </ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
457 </article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
458
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
459 =======
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
460 >>>>>>> other
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
461 <article class='smaller'>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
462 <<<<<<< local
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
463 <h3>付録 : Block Read の実装(1/2)</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
464 =======
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
465 <h3>Blocked Read の実装</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
466 >>>>>>> other
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
467 <br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
468 <<<<<<< local
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
469 <h3 class="yellow">Block Read の実装</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
470 <pre>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
471 HTaskPtr t_read = manager->create_task(READ_TASK);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
472 t_read->set_cpu(read_spe_cpu);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
473 // 読み出すファイルの格納場所を設定
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
474 t_read->set_outData(0,
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
475 w->file_mmap + w->task_spawned * w->division_size,
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
476 w->task_blocks * w->division_size);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
477 // ファイルディスクリプタの受け渡し
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
478 t_read->set_param(0,w->fd);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
479 // ファイル読み込みの始点
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
480 t_read->set_param(1,w->task_spawned*w->division_size);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
481 =======
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
482 <img src='images/blockread.png' style="height:250px">
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
483 <br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
484 >>>>>>> other
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
485
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
486 <<<<<<< local
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
487 // run_tasks(manager,w, w->task_blocks, t_read, t_next, w->division_size + w->extra_len);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
488 // ここで、ファイルに対して何らかの計算を掛けるような Task を設定する
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
489 run_tasks(manager,w, w->task_blocks,・・・ );
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
490
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
491 // ファイル読み込みの終点
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
492 t_read->set_param(2,w->task_spawned*w->division_size + w->extra_len);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
493
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
494 t_read->spawn();
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
495
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
496 </pre>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
497 =======
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
498 <ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
499 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
500 Task を 1 つずつ生成するのではなく、ブロック単位で生成する。<br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
501 この図では、1 Block 当たり n 個の Task を生成する。<br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
502 (1つずつ生成すると、生成された Task で memory を圧迫するため)
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
503 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
504 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
505 Task 1つ当たりの読み込む領域を L とする。<br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
506 Blocked Read Task 1つ当たり、memory に格納する大きさは L × n となる。
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
507 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
508 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
509 Blocked Read Task が読み込み終わるまで、Task Block に wait を掛ける。<br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
510 (Read Task が格納する前に走ると、まだ格納していない領域を読みこんでしまう。)
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
511 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
512 </ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
513 >>>>>>> other
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
514 </article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
515
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
516 <article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
517 <<<<<<< local
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
518 <h3>付録 : Block Read の実装(2/2)</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
519 =======
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
520 <h3>ベンチマーク(1/3)</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
521 >>>>>>> other
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
522 <br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
523 <<<<<<< local
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
524 <h3 class="yellow"> Block Read の記述</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
525 <pre>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
526 static int
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
527 read_task(SchedTask *s, void *rbuf, void *wbuf)
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
528 {
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
529 long fd = (long)s->get_param(0);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
530 long start_read_position = (long)s->get_param(1);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
531 long end_read_position = (long)s->get_param(2);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
532 char *read_text = (char*)s->get_output(wbuf,0);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
533 long read_size = end_read_position - start_read_position;
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
534
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
535 pread(fd, read_text, read_size , start_read_position);
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
536 return 0;
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
537 }
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
538 </pre>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
539 =======
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
540 <h3 class="yellow">実験環境</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
541 <ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
542 <li> Mac OS X 10.9.1</li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
543 <li> 2*2.66 GHz 6-Core Intel Xeon</li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
544 <li> Memory 16GB 1333MHz DDR3</li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
545 <li> HHD 1TB</li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
546 <li> file size : 約 10 GB</li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
547 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
548 "doing" という文字列が file 内にいくつあるか計算<br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
549 ("doing" は 25,961,792 個存在する)
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
550 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
551 </ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
552 >>>>>>> other
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
553 </article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
554
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
555 <<<<<<< local
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
556 =======
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
557 <article class = 'smaller'>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
558 <h3>ベンチマーク(2/3)</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
559 <ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
560 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
561 file が memory に残っていない状態での測定
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
562 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
563 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
564 one task size 128KByte
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
565 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
566 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
567 Task Blocks 48
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
568 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
569 </ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
570 <br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
571 <h3 class="yellow">結果</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
572 <table border="0" cellpadding="0" cellspacing="0">
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
573 <tbody>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
574 <tr>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
575 <td>read mode</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
576 <td>cpu num</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
577 <td>min time(s)</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
578 <td>MAX time(s)</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
579 <td>ave time(s)</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
580 </tr>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
581 <tr>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
582 <td>mmap</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
583 <td>4</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
584 <td>135.2</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
585 <td>148.9</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
586 <td>142.3</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
587 </tr>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
588 <tr>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
589 <td>BRead</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
590 <td>4</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
591 <td>94.5</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
592 <td>109.2</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
593 <td>98.8</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
594 </tr>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
595
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
596 <tr>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
597 <td>mmap</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
598 <td>12</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
599 <td>147.0</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
600 <td>181.8</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
601 <td>154.6</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
602 </tr>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
603 <tr>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
604 <td>BRead</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
605 <td>12</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
606 <td>91.6</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
607 <td>117.5</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
608 <td>99.2</td>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
609 </tr>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
610 </tbody>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
611 </table>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
612
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
613 </article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
614
27
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
615 <article class = 'smaller'>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
616 <h3>ベンチマーク(3/3)</h3>
26
54591c145fec add experiment result
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 25
diff changeset
617 <h3 class="yellow">考察</h3>
27
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
618 <ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
619 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
620 mmap より、Blocked Readのほうが % ほど速くなった
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
621 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
622 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
623 I/O と Task が分離できた。
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
624 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
625 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
626 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
627 </ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
628
19
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
629 </article>
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
630
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
631 <article>
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
632 <h3>大学院に進学してしたいこと</h3>
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
633 <br>
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
634 <ul>
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
635 <li>
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
636 さらなる 並列処理向け I/O の動作を改善
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
637 </li>
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
638 <li>
21
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 20
diff changeset
639 I/O を利用した、マルチコアソフトウェアシンセサイザーを設計
19
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
640 </li>
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
641 </ul>
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
642
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
643 </article>
36958c5e0b90 add slide pages 8-17
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
644
27
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
645 <article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
646 <h3>マルチコアソフトウェアシンセサイザーの設計</h3>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
647 <br>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
648 <ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
649 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
650 作曲をする際にはマシンパワーが必要となることが多い。
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
651 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
652 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
653 ソフトウェアシンセサイザー(以下、シンセサイザー)を使用する際にマシンパワーが必要となる。
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
654 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
655 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
656 シンセサイザーは1つだけで立ち上げる物ではなく、複数立ち上げる物なので、1つ1つの負荷を抑えることがキーポイントとなる。
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
657 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
658 <li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
659 シンセサイザーは様々なフィルターをかけることで音を作っていくのだが、フィルターを重ねても動作軽量なプログラムを作る。
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
660 </li>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
661 </ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
662 </article>
28
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 27
diff changeset
663 >>>>>>> other
19
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 18
diff changeset
664
13
ff5c2b4ca18a add slide
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents:
diff changeset
665 </body>
ff5c2b4ca18a add slide
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents:
diff changeset
666 </html>
27
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
667 </ul>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
668
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
669 </article>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
670
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
671 </body>
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 26
diff changeset
672 </html>