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19 | <!--+ |
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20 | |header |
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22 | <div class="header"> |
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23 | <!--+ |
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24 | |start group logo |
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26 | <div class="grouplogo"> |
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27 | <a href="http://www.hoard.org"><img class="logoImage" alt="Hoard" src="images/hoard-logo.jpg" title="The Hoard Multiprocessor Memory Allocator"></a> |
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77 | <div onclick="SwitchMenu('menu_selected_1.1', 'skin/')" id="menu_selected_1.1Title" class="menutitle" style="background-image: url('skin/images/chapter_open.gif');">Table of Contents</div> |
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79 | <div class="menuitem"> |
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80 | <a title="Welcome to Hoard" href="index.html">Home</a> |
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81 | </div> |
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82 | <div class="menuitem"> |
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83 | <a title="Download Hoard" href="download.html">Download</a> |
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84 | </div> |
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85 | <div class="menupage"> |
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86 | <div class="menupagetitle">Screenshots</div> |
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87 | </div> |
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88 | <div class="menuitem"> |
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89 | <a title="How to Use Hoard" href="using.html">Using Hoard</a> |
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90 | </div> |
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91 | <div class="menuitem"> |
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92 | <a title="How to Build Hoard" href="building.html">Building Hoard</a> |
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93 | </div> |
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94 | <div class="menuitem"> |
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95 | <a title="FAQs" href="faqs.html">FAQs</a> |
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96 | </div> |
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97 | <div class="menuitem"> |
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98 | <a title="License Info" href="licensing.html">Licensing Info</a> |
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104 | <!--+ |
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111 | <!--+ |
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112 | |start content |
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114 | <div id="content"> |
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115 | <div id="skinconf-txtlink"></div> |
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116 | <h1>Screenshots</h1> |
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117 | |
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118 | |
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119 | <p> |
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120 | Because Hoard is a transparent plug-in replacement, ordinary |
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121 | screenshots don't make much sense, since the applications look and |
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122 | work the same! However, it's easy to visualize Hoard's impact on |
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123 | application performance. Here are a few example speedup |
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124 | graphs. Ideally, the speedup as the number of processors increases |
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125 | is a straight diagonal line going from the lower left of each graph |
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126 | to the upper right. These benchmarks compare Hoard to Ptmalloc (the |
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127 | Linux allocator), mtmalloc version 8, and the Solaris default |
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128 | allocator, and are run on a 14-processor Sun. |
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129 | </p> |
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130 | |
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131 | |
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132 | <table class="ForrestTable" cellspacing="1" cellpadding="4"> |
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133 | |
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134 | <tr> |
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135 | |
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136 | <td colspan="1" rowspan="1"> |
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137 | <!-- <center> --> |
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138 | <img alt="Threadtest graph" src="images/plot-threadtest-speedup.gif"> |
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139 | <!-- </center> --> |
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140 | </td> |
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141 | |
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142 | </tr> |
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143 | |
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144 | <tr> |
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145 | |
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146 | <td colspan="1" rowspan="1"> |
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147 | <!-- <center> --> |
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148 | |
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149 | <p> |
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150 | This benchmark has multiple threads, each allocating and freeing |
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151 | objects. It stresses raw scalability of allocation in individual |
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152 | threads. In this case, Hoard achieves a linear speedup. Ptmalloc |
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153 | scales to four processors but then runs out of steam. |
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154 | </p> |
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155 | <!-- </center> --> |
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156 | |
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157 | </td> |
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158 | |
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159 | </tr> |
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160 | |
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161 | <tr> |
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162 | |
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163 | <td colspan="1" rowspan="1"> |
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164 | <!-- <center> --> |
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165 | <img alt="Larson graph" src="images/plot-larson-speedup.gif"> |
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166 | <!-- </center> --> |
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167 | </td> |
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168 | |
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169 | </tr> |
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170 | |
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171 | <tr> |
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172 | |
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173 | <td colspan="1" rowspan="1"> |
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174 | <!-- <center> --> |
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175 | |
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176 | <p> |
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177 | In this benchmark, multiple threads allocate objects and pass some |
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178 | objects to other threads that free them. This stresses the ability |
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179 | of the memory manager to handle object sharing. Only Hoard scales |
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180 | for this case. |
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181 | </p> |
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182 | <!-- </center> --> |
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183 | |
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184 | </td> |
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185 | |
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186 | </tr> |
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187 | |
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188 | <tr> |
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189 | |
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190 | <td colspan="1" rowspan="1"> |
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191 | <!-- <center> --> |
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192 | <img alt="Cache-scratch graph" src="images/plot-cache-scratch-speedup.gif"> |
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193 | <!-- </center> --> |
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194 | </td> |
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195 | |
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196 | </tr> |
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197 | |
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198 | <tr> |
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199 | |
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200 | <td colspan="1" rowspan="1"> |
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201 | <!-- <center> --> |
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202 | |
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203 | <p> |
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204 | A test of whether a memory manager avoids causing false sharing of |
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205 | cache lines (an insidious effect that destroys scalability). The |
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206 | linear speedup shows that Hoard avoids false sharing completely. |
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207 | </p> |
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208 | <!-- </center> --> |
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209 | |
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210 | </td> |
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211 | |
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212 | </tr> |
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213 | |
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214 | </table> |
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215 | |
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216 | |
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217 | </div> |
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218 | <!--+ |
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219 | |end content |
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223 | <div id="footer"> |
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225 | |start bottomstrip |
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227 | <div class="lastmodified"> |
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228 | <script type="text/javascript"><!-- |
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229 | document.write("Last Published: " + document.lastModified); |
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230 | // --></script> |
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231 | </div> |
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232 | <div class="copyright"> |
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233 | Copyright © 2005 Emery Berger.</div> |
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234 | <div id="feedback"> |
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235 | Send feedback about the website to: |
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236 | <a id="feedbackto" href="mailto:emery@cs.umass.edu?subject=Feedback,screenshot.html">emery@cs.umass.edu</a> |
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