90 lines
2.8 KiB
Plaintext
90 lines
2.8 KiB
Plaintext
page.title=GPU Monitor
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parent.title=Android Monitor
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parent.link=android-monitor.html
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meta.tags="android, performance, profiling, tools, monitor"
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page.tags="android", "performance", "profiling", "tools", "monitor"
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page.metaDescription=Use the GPU Monitor for a visual representation of how much time it takes to render the frames of a UI window. Use this information to optimize the code that displays graphics and conserve memory.
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page.image=tools/help/thumbnails/am-gpumon.png
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page.article=true
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@jd:body
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<div id="qv-wrapper">
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<div id="qv">
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<h2>In this document</h2>
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<ol>
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<li><a href="#running">Displaying a Running App in the GPU Monitor</a></li>
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</ol>
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</div>
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</div>
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<p>
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The GPU Monitor gives you a quick visual representation of how much time it takes to render the
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frames of a UI window. It profiles the amount of time it takes for the render thread to prepare,
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process, and execute the draw commands. The GPU Monitor can help you to:
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</p>
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<ul>
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<li>Quickly see how a UI window performs.
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</li>
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<li>Identify whether any part of the rendering pipeline stands out in using processing time.
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</li>
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<li>Look for spikes in frame rendering time associated with user or program actions.
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</li>
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</ul>
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<p>
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For example, if displaying a static photo continues to take Graphics Processor Unit
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(GPU) resources long after it has finished
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drawing on the screen, that’s a likely candidate for optimization.
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</p>
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<h2 id="running">
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Displaying a Running App in the GPU Monitor
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</h2>
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<p>
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To display an app running on a particular device or emulator in the GPU Monitor:
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</p>
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<ol>
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<li>Meet the <a href=
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"{@docRoot}tools/help/am-basics.html#byb">prerequisites and dependencies</a>.
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</li>
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<li>Open an app project.
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</li>
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<li><a href=
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"{@docRoot}tools/building/building-studio.html#RunningApp">Run the app</a> on a hardware device or
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emulator.
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</li>
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<li>
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<a href="{@docRoot}tools/help/am-basics.html#displaying">Display Android Monitor</a>.
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</li>
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<li>Click the <strong>Monitors</strong> tab and <a href=
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"{@docRoot}tools/help/am-basics.html#rearranging">display the GPU Monitor</a>.
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</li>
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<li>Enable the GPU Monitor by clicking Pause <img src="{@docRoot}images/tools/am-ipause.png"
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style="vertical-align:sub;margin:0;height:17px" alt="Pause icon" /> to deselect it.
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</li>
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<p>
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Any GPU usage begins to appear in the GPU Monitor:
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</p>
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<img src="{@docRoot}images/tools/am-gpumon2.png" style="vertical-align:sub;margin:0" />
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<p>
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The y-axis is the amount of time it takes the GPU to execute, process, prepare, and draw frames,
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in milliseconds. The x-axis records the time elapsed; it starts with seconds, and then minutes
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and seconds, and so on.
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</p>
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<li>To stop the GPU Monitor, click Pause <img src="{@docRoot}images/tools/am-ipause.png" style="vertical-align:sub;margin:0;height:17px" alt="Pause icon" /> again to select
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it.
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</li>
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</ol>
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