sysperfana/perfinvestigator/com.nokia.carbide.cpp.pi.doc.user/html/concepts/graphics_memory_usage_capture.htm
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<h2>Graphics Memory Usage Capture</h2>
<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>
<p align="center"><img src="images/con_memory_usage.png" width="626" height="582"></p>
<p class="figure">Figure 1. Memory Usage Capture information displayed in an analyser view. </p>
<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>
<ul>
<li>a stack/heap chunk contains the stack and heap used in the main thread of the process</li>
<li>a code chunk exists if the process is loaded into RAM</li>
<li>a data chunk exists if the process has static data</li>
</ul>
<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>
<h5>Related references</h5>
<ul>
<li><a href="../reference/analyzer/view_memory_usage.htm">Memory Usage View</a></li>
<li><a href="../reference/analyzer/menu_memory_graph.htm">Memory Graph Menu </a> </li>
</ul>
<h5>Related tasks</h5>
<ul>
<li><a href="../reference/profiler/tracing_options.htm">Setting Tracing Options</a></li>
</ul>
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