sysperfana/perfinvestigator/com.nokia.carbide.cpp.pi.doc.user/html/concepts/graphics_memory_usage_capture.htm
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1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> |
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5 <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> |
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6 <title>Graphics Memory Usage Capture</title> |
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7 <link href="../../book.css" rel="stylesheet" type="text/css"> |
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10 <body> |
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11 <h2>Graphics Memory Usage Capture</h2> |
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12 <p> Use the Profiler application's <b>Memory usage capture</b> <a href="../reference/profiler/tracing_options.htm">option</a> to capture memory usage data on the target device. The data is stored in the profiler data file during a trace operation and can later be viewed in the Analyzer (Figure 1).</p> |
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13 <p align="center"><img src="images/con_memory_usage.png" width="626" height="582"></p> |
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14 <p class="figure">Figure 1. Memory Usage Capture information displayed in an analyser view. </p> |
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15 <p>The Symbian OS API allocates memory in chunks. A chunk is a region of RAM mapped into contiguous linear addresses. At creation, a process has one to three chunks: </p> |
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16 <ul> |
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17 <li>a stack/heap chunk contains the stack and heap used in the main thread of the process</li> |
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18 <li>a code chunk exists if the process is loaded into RAM</li> |
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19 <li>a data chunk exists if the process has static data</li> |
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20 </ul> |
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21 <p> A process can create more chunks, including global chunks accessible by other processes. When a chunk is created, is owned by the current process or the current thread.</p> |
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22 <h5>Related references</h5> |
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23 <ul> |
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24 <li><a href="../reference/analyzer/view_memory_usage.htm">Memory Usage View</a></li> |
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25 <li><a href="../reference/analyzer/menu_memory_graph.htm">Memory Graph Menu </a> </li> |
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26 </ul> |
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27 <h5>Related tasks</h5> |
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28 <ul> |
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29 <li><a href="../reference/profiler/tracing_options.htm">Setting Tracing Options</a></li> |
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30 </ul> |
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31 <div id="footer">Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. <br>License: <a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a></div> |
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32 </body> |
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33 </html> |