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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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40 <body>
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41
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42 <div class="layout">
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43 <div id="header"></div>
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44 <div id="footer">
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45 <div align="right">
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46 <img src="s6/images/logo.svg" width="200px">
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47 </div>
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48 </div>
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49 </div>
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50
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51 <div class="presentation">
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52
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53 <div class='slide cover'>
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54 <table width="90%" height="90%" border="0" align="center">
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55 <tr>
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56 <td>
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57 <div align="center">
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58 <h1><font color="#808db5">Studying Operating System Using Docker Platform</font></h1>
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59 </div>
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60 </td>
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61 </tr>
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62 <tr>
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63 <td>
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64 <div align="left">
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65 Shivani Dubey
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66 Intern, University of the Ryukyus
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67 <hr style="color:#ffcc00;background-color:#ffcc00;text-align:left;border:none;width:100%;height:0.2em;">
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68 </div>
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69 </td>
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70 </tr>
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71 </table>
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72 </div>
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73
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74
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75 <div class='slide'>
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76
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77 <!-- _S9SLIDE_ -->
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78 <h1 id="why-operating-system">Why Operating System?</h1>
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79
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80 <ul>
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81 <li>
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82 <p>Backbone of computer system</p>
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83 </li>
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84 <li>
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85 <p>Manages the computer’s memory and processes, as well as all of its software and hardware.</p>
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86 </li>
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87 </ul>
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88
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89
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90
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91 </div>
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92
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93 <div class='slide'>
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94 <!-- _S9SLIDE_ -->
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95 <h1 id="introduction">Introduction</h1>
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96
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97 <ul>
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98 <li>
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99 <p>Docker</p>
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100 </li>
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101 <li>
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102 <p>xv6</p>
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103 </li>
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104 </ul>
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105
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106 <p>What is Docker?</p>
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107
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108 <ul>
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109 <li>The modern platform for high velocity innovation</li>
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110 <li>Docker has products that use operating system level virtualization to develop and deliver software in packages called containers</li>
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111 <li>Docker can run on any computer, on any infrastructure and in any cloud</li>
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112 </ul>
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113
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114 <p>What is xv6?</p>
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115
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116 <ul>
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117 <li>
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118 <p>A Unix-like operating system developed in MIT.</p>
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119 </li>
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120 <li>
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121 <p>xv6 is modern reimplementation of Sixth Edition Unix in ANSI C.</p>
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122 </li>
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123 </ul>
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124
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125
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126
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127 </div>
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128
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129 <div class='slide'>
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130 <!-- _S9SLIDE_ -->
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131 <h1 id="what-helped-us">What helped us</h1>
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132
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133 <ul>
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134 <li>
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135 <p>emacs editor (amidst the editor war between vi and emacs!)</p>
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136 </li>
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137 <li>
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138 <p>homebrew (it simplifies installation of software in macOS)</p>
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139 </li>
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140 <li>
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141 <p>Mercurial repository of the lab where we saved everything using ssh</p>
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142 </li>
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143 </ul>
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144
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145
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146
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147 </div>
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148
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149 <div class='slide'>
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150 <!-- _S9SLIDE_ -->
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151 <h2 id="why-docker">Why Docker?</h2>
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152
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153 <p>Features of Docker:</p>
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154
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155 <ul>
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156 <li>
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157 <p>Easy and Faster Configuration</p>
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158 </li>
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159 <li>
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160 <p>Increases productivity</p>
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161 </li>
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162 <li>
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163 <p>Application Isolation</p>
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164 </li>
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165 <li>
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166 <p>Services</p>
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167 </li>
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168 <li>
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169 <p>Security Management</p>
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170 </li>
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171 </ul>
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172
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173
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174
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175 </div>
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176
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177 <div class='slide'>
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178 <!-- _S9SLIDE_ -->
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179 <h2 id="why-xv6">Why xv6?</h2>
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180
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181 <ul>
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182 <li>
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183 <p>It gives a good insight into Command Line Interface of Unix OS</p>
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184 </li>
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185 <li>
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186 <p>xv6 is modern reimplementation of Sixth Edition Unix in ANSI C</p>
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187 </li>
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188 </ul>
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189
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190
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191
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192 </div>
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193
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194 <div class='slide'>
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195 <!-- _S9SLIDE_ -->
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196 <h1 id="scheduling-processes-by-their-priorities">Scheduling processes by their priorities</h1>
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197
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198 <ul>
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199 <li>
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200 <p>Added getpriority() and setpriority() and get_highest_priority() functions in proc.c file of xv6</p>
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201 </li>
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202 <li>
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203 <p>Added a test function testpriority() in usertests.c file of xv6 to implement our algorithm</p>
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204 </li>
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205 </ul>
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206
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207
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208
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209 </div>
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210
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211 <div class='slide'>
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212 <!-- _S9SLIDE_ -->
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213 <h2 id="the-function">The function</h2>
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214
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215 <pre><code class="language-c">int get_highest_priority_proc(void)
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216 {
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217 int highest_priority;
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218 int pid = 0;
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219 int hpid = -1;
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220 int rpid = 0;
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221
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222 highest_priority=100;
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223 struct proc *p;
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224 for(p = ptable.proc; p < &ptable.proc[NPROC]; p++, pid++){
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225 if(p->state != RUNNABLE) {
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226 continue;
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227 }
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228 rpid = pid;
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229 if (highest_priority > p->priority) {
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230 highest_priority=p->priority;
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231 hpid = pid;
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232 }
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233 }
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234 return hpid > 0?hpid:rpid;
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235 }
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236 </code></pre>
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237
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238
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239
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240 </div>
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241
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242 <div class='slide'>
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243 <!-- _S9SLIDE_ -->
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244 <h2 id="docker-limitation">Docker Limitation</h2>
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245
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246 <p>Mutliple images present in repository due to form command.</p>
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247
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248 <p>If repository breaks, Docker poses problem</p>
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249
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250 <p>What can be done?</p>
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251
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252 <p>We can keep track of images of Docker</p>
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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 <h1 id="conclusion">Conclusion</h1>
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261
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262 <ul>
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263 <li>
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264 <p>Docker environment poses some problems, some of which are difficult to comprehend</p>
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265 </li>
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266 <li>
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267 <p>Storage is difficult too</p>
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268 </li>
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269 <li>
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270 <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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271 </li>
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272 </ul>
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273
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274 </div>
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275
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276
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277 </div><!-- presentation -->
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278 </body>
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279 </html>
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