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6 <!DOCTYPE html>
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7 <html>
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8 <head>
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9 <meta http-equiv="content-type" content="text/html;charset=utf-8">
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10 <title>Studying Operating System Using Docker Platform</title>
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11
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12 <meta name="generator" content="Slide Show (S9) v4.1.0 on Ruby 2.3.7 (2018-03-28) [universal.x86_64-darwin16]">
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13 <meta name="author" content="Shivani Dubey" >
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14
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42 prettyPrint();
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43 } );
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45 </script>
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48 <!--[if IE]>
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49 <script src="s6/js/jquery.microsoft.js"></script>
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50 <![endif]-->
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51
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52
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53
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54 </head>
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55 <body>
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56
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57 <div class="layout">
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58 <div id="header"></div>
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59 <div id="footer">
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60 <div align="right">
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61 <img src="s6/images/logo.svg" width="200px">
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62 </div>
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63 </div>
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64 </div>
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65
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66 <div class="presentation">
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67
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68 <div class='slide cover'>
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69 <table width="90%" height="90%" border="0" align="center">
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70 <tr>
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71 <td>
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72 <div align="center">
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73 <h1><font color="#808db5">Studying Operating System Using Docker Platform</font></h1>
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74 </div>
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75 </td>
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76 </tr>
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77 <tr>
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78 <td>
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79 <div align="left">
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80 Shivani Dubey
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81 Intern, University of the Ryukyus
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82 <hr style="color:#ffcc00;background-color:#ffcc00;text-align:left;border:none;width:100%;height:0.2em;">
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83 </div>
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84 </td>
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85 </tr>
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86 </table>
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87 </div>
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88
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89
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90
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91 <div class='slide'>
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92
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93 <!-- _S9SLIDE_ -->
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94 <h1 id="why-operating-system">Why Operating System?</h1>
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95
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96 <ul>
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97 <li>
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98 <p>Backbone of computer system</p>
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99 </li>
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100 <li>
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101 <p>Manages the computer’s memory and processes, as well as all of its software and hardware.</p>
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102 </li>
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103 </ul>
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104
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105
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106
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107 </div>
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108
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109 <div class='slide'>
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110 <!-- _S9SLIDE_ -->
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111 <h1 id="introduction">Introduction</h1>
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112
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113 <ul>
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114 <li>
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115 <p>Docker</p>
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116 </li>
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117 <li>
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118 <p>xv6</p>
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119 </li>
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120 </ul>
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121
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122 <p>What is Docker?</p>
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123
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124 <ul>
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125 <li>The modern platform for high velocity innovation</li>
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126 <li>Docker has products that use operating system level virtualization to develop and deliver software in packages called containers</li>
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127 <li>Docker can run on any computer, on any infrastructure and in any cloud</li>
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128 </ul>
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129
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130 <p>What is xv6?</p>
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131
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132 <ul>
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133 <li>
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134 <p>A Unix-like operating system developed in MIT.</p>
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135 </li>
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136 <li>
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137 <p>xv6 is modern reimplementation of Sixth Edition Unix in ANSI C.</p>
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138 </li>
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139 </ul>
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140
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141
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142
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143 </div>
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144
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145 <div class='slide'>
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146 <!-- _S9SLIDE_ -->
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147 <h1 id="what-helped-us">What helped us</h1>
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148
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149 <ul>
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150 <li>
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151 <p>emacs editor (amidst the editor war between vi and emacs!)</p>
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152 </li>
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153 <li>
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154 <p>homebrew (it simplifies installation of software in macOS)</p>
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155 </li>
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156 <li>
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157 <p>Mercurial repository of the lab where we saved everything using ssh</p>
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158 </li>
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159 </ul>
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160
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161
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162
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163 </div>
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164
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165 <div class='slide'>
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166 <!-- _S9SLIDE_ -->
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167 <h2 id="why-docker">Why Docker?</h2>
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168
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169 <p>Features of Docker:</p>
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170
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171 <ul>
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172 <li>
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173 <p>Easy and Faster Configuration</p>
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174 </li>
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175 <li>
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176 <p>Increases productivity</p>
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177 </li>
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178 <li>
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179 <p>Application Isolation</p>
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180 </li>
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181 <li>
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182 <p>Services</p>
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183 </li>
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184 <li>
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185 <p>Security Management</p>
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186 </li>
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187 </ul>
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188
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189
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190
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191 </div>
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192
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193 <div class='slide'>
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194 <!-- _S9SLIDE_ -->
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195 <h2 id="why-xv6">Why xv6?</h2>
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196
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197 <ul>
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198 <li>
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199 <p>It gives a good insight into Command Line Interface of Unix OS</p>
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200 </li>
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201 <li>
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202 <p>xv6 is modern reimplementation of Sixth Edition Unix in ANSI C</p>
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203 </li>
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204 </ul>
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205
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206
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207
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208 </div>
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209
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210 <div class='slide'>
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211 <!-- _S9SLIDE_ -->
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212 <h1 id="scheduling-processes-by-their-priorities">Scheduling processes by their priorities</h1>
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213
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214 <ul>
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215 <li>
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216 <p>Added getpriority() and setpriority() and get_highest_priority() functions in proc.c file of xv6</p>
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217 </li>
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218 <li>
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219 <p>Added a test function testpriority() in usertests.c file of xv6 to implement our algorithm</p>
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220 </li>
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221 </ul>
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222
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223
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224
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225 </div>
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226
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227 <div class='slide'>
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228 <!-- _S9SLIDE_ -->
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229 <h2 id="the-function">The function</h2>
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230
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231 <pre><code class="language-c">int get_highest_priority_proc(void)
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232 {
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233 int highest_priority;
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234 int pid = 0;
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235 int hpid = -1;
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236 int rpid = 0;
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237
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238 highest_priority=100;
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239 struct proc *p;
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240 for(p = ptable.proc; p < &ptable.proc[NPROC]; p++, pid++){
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241 if(p->state != RUNNABLE) {
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242 continue;
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243 }
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244 rpid = pid;
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245 if (highest_priority > p->priority) {
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246 highest_priority=p->priority;
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247 hpid = pid;
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248 }
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249 }
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250 return hpid > 0?hpid:rpid;
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251 }
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252 </code></pre>
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253
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254
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255
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256 </div>
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257
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258 <div class='slide'>
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259 <!-- _S9SLIDE_ -->
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260 <h2 id="docker-limitation">Docker Limitation</h2>
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261
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262 <p>Mutliple images present in repository due to form command.</p>
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263
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264 <p>If repository breaks, Docker poses problem</p>
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265
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266 <p>What can be done?</p>
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267
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268 <p>We can keep track of images of Docker</p>
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269
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270
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271
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272 </div>
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273
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274 <div class='slide'>
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275 <!-- _S9SLIDE_ -->
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276 <h1 id="conclusion">Conclusion</h1>
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277
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278 <ul>
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279 <li>
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280 <p>Docker environment poses some problems, some of which are difficult to comprehend</p>
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281 </li>
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282 <li>
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283 <p>Storage is difficult too</p>
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284 </li>
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285 <li>
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286 <p>Yet, it gives a good insight of the underlying important concepts of operating system beacuse it is well documented, fast and uses less resources</p>
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287 </li>
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288 </ul>
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289
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290 </div>
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291
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292
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293 </div><!-- presentation -->
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294 </body>
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295 </html>
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