| author | Toni Pulkkinen <ext-toni.p.pulkkinen@nokia.com> |
| Wed, 23 Jun 2010 15:05:09 +0300 | |
| changeset 12 | ae255c9aa552 |
| parent 5 | 844b047e260d |
| permissions | -rw-r--r-- |
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Performance Investigator Carbide extension 2.4.0
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> |
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<html> |
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Performance Investigator Carbide extension 2.4.0
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<head> |
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Performance Investigator Carbide extension 2.4.0
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<meta http-equiv="content-type" content="text/html; charset=iso-8859-1"> |
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<title>Using the Profiler</title> |
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Performance Investigator Carbide extension 2.4.0
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<link href="../../../book.css" rel="stylesheet" type="text/css"> |
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Performance Investigator Carbide extension 2.4.0
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<style type="text/css"> |
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.style1 {font-family: "Courier New", Courier, mono}
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--> |
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Performance Investigator Carbide extension 2.4.0
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</style> |
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Performance Investigator Carbide extension 2.4.0
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</head> |
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Performance Investigator Carbide extension 2.4.0
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<body> |
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Performance Investigator Carbide extension 2.4.0
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<h2>Using the Profiler</h2> |
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<h4>Overview</h4> |
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<p>After successfully <a |
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href="../../tasks/profiler/prof_installation.htm">installing</a> the Profiler |
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.SISX file on your target device, you will be able to access the user |
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Performance Investigator Carbide extension 2.4.0
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interface. Run the <b>CarbidePI</b> application located in the |
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Performance Investigator Carbide extension 2.4.0
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“Installed” applications (Figure 1).</p> |
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<p align="center"><img src="../profiler/images/SamplingProfilerMainWindow.png" ></p> |
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<p align="center" class="figure">Figure 1 - Profiler Main Window (S60) </p> |
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<p>In Options, configure the necessary run-time options. Specify which traces |
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Performance Investigator Carbide extension 2.4.0
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you want enabled, where to place the generated .dat profiler data file, the |
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Performance Investigator Carbide extension 2.4.0
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profiler file prefix, and the trace priority sampling interval.</p> |
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<p>In the Profiler, the Address/Thread trace is <strong>always</strong> active |
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when profiling is performed. Other traces are synchronized with the |
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Performance Investigator Carbide extension 2.4.0
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Address/Thread trace.</p> |
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<p>In addition to Address/Thread trace, you can enable additional trace options |
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such as dynamic binary support, memory and power usage, and function calls.</p> |
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<div class="step"> |
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<h4>Profiling an Application</h4> |
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<ol> |
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<li>Open the Profiler options screen |
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<p>Select the Tracing options menu from the Profiler menu (Figure 2) </p> |
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<p align="center"><img src="images/TracingOptions.png"></p> |
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</li> |
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<p class="figure">Figure 2 - Tracing Options</p> |
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<li>Enable or disable trace options</li> |
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<p>Specify On or Off for the available trace items - Dynamic binary support, |
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Function call capture, and Thread priority capture. (Figure 3).</p> |
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<blockquote> |
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<p align="left" class="note"><b>NOTE</b> If the executables you wish to |
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analyze are not in a ROM image (.symbol file) of your target device, then |
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you will need to turn on Dynamic binary support.</p> |
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<p align="center"><img src="../profiler/images/TracingOptionsList.png" ></p> |
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<p align="center"><img src="../profiler/images/TracingOptionsList2.png" ></p> |
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<p align="center" class="figure">Figure 3 - List of Trace Items</p> |
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<li>Specify Output</li> |
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<p>Specify the output for the sampled data (Figure 4). The output method can |
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be either the <span class="style1">File system</span> or <span |
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class="style1">Debug port</span>. If you select File system, you can save the |
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data file to a memory card or the target device C:\ drive. With the debug |
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port output method, you will need hardware (such as the Nokia Musti box) |
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connected to the XTI/STI debug port to capture the profiler data. There is |
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less profiler overhead if the debug port is used.</p> |
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<p align="center"> |
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<img src="../profiler/images/OutputOptionsWindow_FileSystem.png" |
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></p> |
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<p align="center" class="figure">Figure 4 - Output Options</p> |
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<p>You can specify the file prefix for data files. The name of the profiler |
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data file is formed from the prefix plus stream.dat. If you perform multiple |
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traces and use the file output option, include a hash mark (#) in your file |
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prefix. Subsequent traces will then be saved with different file names. The |
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hash mark is automatically replaced with a number. For example, if you define |
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the file prefix as <span class="style1">PI_#_</span>, multiple trace files |
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will be named <span class="style1">PI_1_STREAM.dat, PI_2_STREAM.dat, … |
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PI_100_STREAM.dat</span>. Only one hash mark is needed to provide sequential |
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numbering. If no hash mark is present, the same file will be overwritten with |
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the same name.</p> |
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<p class="note"><strong>NOTE</strong> Currently, files names should be 19 |
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characters or less.</p> |
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<li>Specify Advanced Options</li> |
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<p>In Advanced options, specify the thread priority sample interval (Figure |
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5). The operating system is called automatically every millisecond to |
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determine what thread is currently executing. This interval setting indicates |
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how often an additional query to the operating system is made to determine |
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the priority of the currently executing thread. The interval is specified in |
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milliseconds. The default is 3000 milliseconds (3 seconds). You can get a |
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thread priority as often as you like but be aware that frequent sampling of |
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the OS may skew the performance measurement while making the call. There is a |
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significant overhead to obtaining the priorities of all threads.</p> |
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<p>You can choose an address/thread sampling interval between 1ms and 10000ms |
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(10 seconds). For intervals greater than 1 ms, memory, power, priority and |
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button events are sampled periodically; not every millisecond. Memory and |
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button events are individual events. For memory and priority the current |
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memory size and priority are recorded before entering the time interval, then |
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changes during the interval are recorded and the final memory size and |
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priority when it exits the interval is recorded.</p> |
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<p align="center"> |
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<img src="../profiler/images/AdvancedOptionsEditBox.png" |
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></p> |
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<p align="center" class="figure">Figure 5 - Priority sample interval</p> |
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<li>Profile your application</li> |
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<p>After establishing your desired options, select <strong>Options > |
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Profiler > Start</strong> from the main window (Figure 6) to begin |
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sampling.The state will change from "Initializing" to "Sampling" and then |
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"Finished". When the state has changed to “Profiling” or |
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"Sampling", the trace activity has begun. Note that none of the |
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configurations can be changed when the tracing is active.</p> |
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<p class="note"><b>IMPORTANT!</b> After the trace activity has started, leave |
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the Profiler running in the background. Now you can proceed with the use case |
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you wish to analyze. For example, run your application on the device.</p> |
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<p align="center"> |
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<img src="images/profiler_start_profiler.png" |
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></p> |
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<p align="center" class="figure">Figure 6 - Starting a trace session </p> |
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<p>Stop the trace activity by switching back to the profiler and selecting |
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<strong>Options > Profiler > Stop</strong>. Do not use the profiler |
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while the trace data is being written to the data file. When the profiler is |
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stopped, the profiler state shown in the main window will change from |
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“profiling” to “stopping profiler”, and finally back |
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to “ready”. The profiler data file is automatically written to |
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the output previously selected. The actual amount of produced data depends on |
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the length of time tracing was active and which trace options were selected. |
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The Address/Thread trace alone produces approximately 1-4 Kbytes / second. |
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Transfer the data file to your workstation to be analyzed with the |
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analyzer.</p> |
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</ol> |
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</div> |
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<p><strong>Related references </strong></p> |
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<ul> |
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<li><a href="../../tasks/profiler/prof_installation.htm">Installing the |
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Profiler on the Target Device</a></li> |
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<li><a href="../../tasks/analyser/an_load_trace_files.htm">Importing Profiler |
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Data File for Analysis </a></li> |
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</ul> |
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<div id="footer"> |
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Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies). All rights |
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reserved. <br> |
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License: <a |
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href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a></div> |
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</body> |
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</html> |