📄 trace.htm
字号:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /><title> UDT Reference</title><link rel="stylesheet" href="udtdoc.css" type="text/css" /></head><body><div class="ref_head"> UDT Reference: Functions</div><h4 class="func_name"><strong>perfmon</strong></h4><p>The <b>perfmon</b> method retrieves the internal protocol parameters and performance trace.</p><div class="code">int perfmon(<br /> UDTSOCKET <font color="#FFFFFF">u</font>,<br /> TRACEINFO* <font color="#FFFFFF">perf</font>,<br /> bool <font color="#FFFFFF">clear</font> = true<br />);</div><h5>Parameters</h5><dl> <dt><i>u</i></dt> <dd>[in] Descriptor identifying a UDT entity.</dd> <dt><i>trace</i></dt> <dd>[out] Pointer to the <a href="structure.htm">TRACEINFO</a> structure to store the performance information.</dd> <dt><i>clear</i></dt> <dd>[in] Flag that indicates if the local traces should be cleared and counts should be restarted.</dd></dl><h5>Return Value</h5><p>If success, 0 is returned and trace information is written into <i>trace</i>; otherwise, UDT::ERROR is returned and specific error information can be retrieved by <a href="error.htm">getlasterror</a>.</p><table width="100%" border="1" cellpadding="2" cellspacing="0" bordercolor="#CCCCCC"> <tr> <td width="17%" class="table_headline"><strong>Error Name</strong></td> <td width="17%" class="table_headline"><strong>Error Code</strong></td> <td width="83%" class="table_headline"><strong>Comment</strong></td> </tr> <tr> <td>ECONNLOST</td> <td>2001</td> <td>connection is broken.</td> </tr> <tr> <td>EINVSOCK</td> <td>5004</td> <td><i>u</i> is an invalid socket.</td> </tr> <tr> <td>EUNBOUNDSOCK</td> <td>5005</td> <td><i>u</i> is not connected.</td> </tr></table><h5>Description</h5><p>The <strong>perfmon</strong> method reads the performance data since the last time <strong>perfmon</strong> is executed, or since the connection is started. The result in written into a <a href="structure.htm">TRACEINFO</a> structure.</p><p>There are three kinds of performance information that can be read by applications: the total counts since the connection is started, the periodical counts since last time the counts are cleared, and instant parameter values.<p></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -