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<title>7.6 Idle profiling</title>
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<a name="1204683"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">7.6 Idle profiling</font>
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<a name="1204684"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Idle profiling measures the time the CPU spends idle, that is, the time not executing code. This is performed by recording the times when the processor becomes idle and the times when it becomes active again. The times generated are measured in microseconds.</font>
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<a name="1204686"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The diagnostic controller on a hardware target can detect when the processor becomes idle and when it becomes active again. The simulator can provide similar signals.</font>
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<a name="1204687"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Idle profiling may be selected by entering a <font size=2 face=Courier><strong>profile</strong></font> command with the <font face="Verdana, Arial, Helvetica, sans-serif"><b>prof i</b></font> option. The time data can be extracted using the <font size=2 face=Courier><strong>profile</strong></font> command with the <font face="Verdana, Arial, Helvetica, sans-serif"><b>idle</b></font> option. The <font size=2 face=Courier><strong>profile</strong></font> command options <font face="Verdana, Arial, Helvetica, sans-serif"><b>isize</b></font> and <font face="Verdana, Arial, Helvetica, sans-serif"><b>iwrap</b></font> enable the size of the idle profiling buffer to be set and to specify whether, when the buffer is full, to overwrite existing data or discard new data.</font>
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<a name="1204688"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">For example, the following sequence of commands idle profiles the application in <font size=2 face=Courier><strong>hello.lku</strong></font> on the target called <font size=2 face=Courier><strong>st20</strong></font>:</font>
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<a name="1204689"> </a><font size=2 face=Courier><strong>> connect st20⌨️ 快捷键说明
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