| author | Toni Pulkkinen <ext-toni.p.pulkkinen@nokia.com> |
| Wed, 21 Apr 2010 15:14:16 +0300 | |
| changeset 5 | 844b047e260d |
| child 12 | ae255c9aa552 |
| permissions | -rw-r--r-- |
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844b047e260d
Performance Investigator Carbide extension 2.3.0
Toni Pulkkinen <ext-toni.p.pulkkinen@nokia.com>
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" |
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Performance Investigator Carbide extension 2.3.0
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"http://www.w3.org/TR/html4/loose.dtd"> |
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Performance Investigator Carbide extension 2.3.0
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<html> |
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Performance Investigator Carbide extension 2.3.0
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<head> |
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844b047e260d
Performance Investigator Carbide extension 2.3.0
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<meta http-equiv="content-type" content="text/html; charset=UTF-8"> |
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Performance Investigator Carbide extension 2.3.0
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<title>Performance Counters View</title> |
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Performance Investigator Carbide extension 2.3.0
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<link href="../../../book.css" rel="stylesheet" type="text/css"> |
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Performance Investigator Carbide extension 2.3.0
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</head> |
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Performance Investigator Carbide extension 2.3.0
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<body> |
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Performance Investigator Carbide extension 2.3.0
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<h2>Performance Counters View</h2> |
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Performance Investigator Carbide extension 2.3.0
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<p>Use the <strong>Performance Counters</strong> view to display information on |
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844b047e260d
Performance Investigator Carbide extension 2.3.0
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performance counter traces. By default, the Performance Counters view opens up |
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Performance Investigator Carbide extension 2.3.0
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as minimised on the PIAnalyzer main view. To view the graphs, click the restore |
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844b047e260d
Performance Investigator Carbide extension 2.3.0
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button <img src="images\minimize_restore_graph.png" width="16" height="16"> or |
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844b047e260d
Performance Investigator Carbide extension 2.3.0
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the maximize button <img src="images\maximize_graph.png" width="16" |
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height="16"> on the Title bar.</p> |
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<p>The Performance Counters displayed in the view include two user selected |
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844b047e260d
Performance Investigator Carbide extension 2.3.0
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traces (A and B in Figure 1) and CPU cycles (C in Figure 1). A MIPS (Million |
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844b047e260d
Performance Investigator Carbide extension 2.3.0
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Instructions Per Second) counter is also available if <b>Instructions |
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Performance Investigator Carbide extension 2.3.0
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executed</b> has been selected as one of the traces.</p> |
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<p>You can select which traces are displayed in the graphs view by clicking the |
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Performance Investigator Carbide extension 2.3.0
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check box next to the trace name in the legend table below the graphs. When |
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Performance Investigator Carbide extension 2.3.0
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several traces are selected, a separate graph line is displayed for each trace, |
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Performance Investigator Carbide extension 2.3.0
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as shown in Figure 1. </p> |
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<p>In the top left-hand corner of each graph line, the following information |
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844b047e260d
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displayed:</p> |
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<ul> |
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<li>type of the trace,</li> |
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<li>the sampling interval (1 sample per millisecond in Figure 1),</li> |
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Performance Investigator Carbide extension 2.3.0
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<li>the minimum and maximum values over the whole duration of the trace. |
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(Note that the legend table lists the minimum and maximum values only for |
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the selected timeframe.) </li> |
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</ul> |
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<p>Note that the scaling of the graphs changes according to the maximum values |
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for each graph. You can see the vertical axis values for each graph on the left |
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side of the graph.</p> |
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<p>A legend table is displayed below the graphs.</p> |
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<p align="center"><img |
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src="images/performance_counters_view_all_graphs.png"></p> |
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<p class="figure">Figure 1. Performance Counters view with all trace graphs |
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displayed</p> |
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<p></p> |
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<p>Description of the table columns: </p> |
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<ul> |
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<li>The <b>Char</b> column contains an identifier for each trace.</li> |
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<li>The <b>Name</b> column contains the type of performance counter that was |
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traced.</li> |
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<li>The <b>Average (1/ms)</b> column contains the average occurrence of the |
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event that was traced, within the selected timeframe (for example, the |
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average number of cache misses per millisecond, as shown in Figure 1).</li> |
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<li>The <b>Sum</b> column contains the total number of event occurrences |
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within the selected timeframe. (not included for MIPS)</li> |
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<li>The <b>Min (1/ms)</b> column contains the minimum occurrence of the event |
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that was traced, within the selected timeframe (for example, minimum number |
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of data stalls per millisecond, as show in Figure 1).</li> |
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<li>The <b>Max (1/ms)</b> column contains the maximum occurrence of the event |
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that was traced, within the selected timeframe (for example, maximum number |
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of data stalls per millisecond, as show in Figure 1).</li> |
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<li>The <b>Per A</b> / <b>Per B</b> / <b>Per C</b> columns show the ratio of |
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the values of the different traces (For example, Per A shows the number of |
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events in the sum column of each trace divided by the sum of trace A). (not |
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included for MIPS)</li> |
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</ul> |
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<p>Check the boxes at the right side of the table to select the traces for the |
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graphs view.</p> |
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<p>Columns may be reordered, resized, and sorted by clicking or dragging column |
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headers.</p> |
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<p>You can right-click on the table to open a context menu, where you can |
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select to copy either selected lines or the entire table to clipboard; or to |
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save the table to CSV format. </p> |
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<br> |
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<p><strong>MIPS counter and graph</strong></p> |
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<p>The Million Instructions Per Second (MIPS) graph gives you a general idea of |
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CPU speed in a measured use case. The basic use case for the MIPS analysis |
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would be to check any low areas in the graph since they may reveal unoptimized |
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features, for example, in terms of memory access (reads and writes). The higher |
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the MIPS values, the better and the faster the CPU is in executing |
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instructions.</p> |
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<p>A MIPS (Million Instructions Per Millisecond) graph is displayed in the |
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Performance Counters view, when <b>Instructions executed</b> has been selected |
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as one of the counters. If <b>Instructions executed</b> has been selected, the |
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dialog below is displayed during PIAnalyser file import:</p> |
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<p align="center"><img src="images/MIPS_speed_dialog.png"></p> |
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<p class="figure">Figure 1. MIPS Graph Generation</p> |
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<p>The processor speed information is needed for calculating the data for the |
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MIPS graph. The rest of the data for the calculation is included in the |
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<b>Instructions executed</b> and <b>CPU cycles</b> counters.</p> |
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<p>The MIPS counter information is displayed in the graphs view and the legend |
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table together with the other performance counters. Note, however, that for |
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MIPS only <b>Average (1/ms)</b>, <b>Min (1/ms)</b>, and <b>Max (1/ms)</b> |
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information is displayed in the legend table.</p> |
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<p><br> |
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</p> |
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<p><strong>Related references </strong></p> |
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<ul> |
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<li><a href="../../reference/analyzer/traceable_events.htm">Traceable Event |
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Types</a></li> |
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<li><a href="../../reference/profiler/Prof_counter_settings.htm">PIProfiler |
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Performance Counter Settings</a></li> |
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<li><a href="main_view.htm">Analyzer View</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> |