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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>function::get_cycles</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1"><link rel="start" href="index.html" title="SystemTap Tapset Reference Manual"><link rel="up" href="ch03.html" title="Chapter 3. Timestamp Functions"><link rel="prev" href="re97.html" title="function::delete_stopwatch"><link rel="next" href="re99.html" title="function::gettimeofday_ms"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>function::get_cycles</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re97.html">Prev</a> </td><th width="60%" align="center">Chapter 3. Timestamp Functions</th><td width="20%" align="right"> <a accesskey="n" href="re99.html">Next</a></td></tr></table><hr></div><div class="refentry" lang="en"><a name="API-get-cycles"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>function::get_cycles —
Processor cycle count
</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="programlisting">
get_cycles:long()
</pre></div><div class="refsect1" lang="en"><a name="idp5727376"></a><h2>Arguments</h2><p>
None
</p></div><div class="refsect1" lang="en"><a name="idp5728592"></a><h2>Description</h2><p>
This function returns the processor cycle counter value
if available, else it returns zero. The cycle counter is free running
and unsynchronized on each processor. Thus, the order of events cannot
determined by comparing the results of the get_cycles function on
different processors.
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