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<body class="manpage">
<div id="header">
<h1>
TRACE-CMD(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>trace-cmd -
   interacts with Ftrace Linux kernel internal tracer
</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="paragraph"><p><strong>trace-cmd</strong> <em>COMMAND</em> [<em>OPTIONS</em>]</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p>The trace-cmd(1) command interacts with the Ftrace tracer that is built inside
the Linux kernel. It interfaces with the Ftrace specific files found in the
debugfs file system under the tracing directory. A <em>COMMAND</em> must be
specified to tell trace-cmd what to do.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_commands">COMMANDS</h2>
<div class="sectionbody">
<div class="literalblock">
<div class="content">
<pre><code>record  - record a live trace and write a trace.dat file to the
          local disk or to the network.</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>set     - set a ftrace configuration parameter.</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>report  - reads a trace.dat file and converts the binary data to a
          ASCII text readable format.</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>stream  - Start tracing and read the output directly</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>profile - Start profiling and read the output directly</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>hist    - show a histogram of the events.</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>stat    - show tracing (ftrace) status of the running system</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>options - list the plugin options that are available to *report*</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>start   - start the tracing without recording to a trace.dat file.</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>stop    - stop tracing (only disables recording, overhead of tracer
          is still in effect)</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>restart - restart tracing from a previous stop (only effects recording)</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>extract - extract the data from the kernel buffer and create a trace.dat
          file.</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>show    - display the contents of one of the Ftrace Linux kernel tracing files</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>reset   - disables all tracing and gives back the system performance.
          (clears all data from the kernel buffers)</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>clear   - clear the content of the Ftrace ring buffers.</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>split   - splits a trace.dat file into smaller files.</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>list    - list the available plugins or events that can be recorded.</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>listen  - open up a port to listen for remote tracing connections.</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>agent   - listen on a vsocket for trace clients</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>setup-guest - create FIFOs for tracing guest VMs</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>restore - restore the data files of a crashed run of trace-cmd record</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>snapshot- take snapshot of running trace</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>stack   - run and display the stack tracer</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>check-events - parse format strings for all trace events and return
               whether all formats are parseable</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>convert   - convert trace files</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>attach   - attach a host trace.dat file to a guest trace.dat file</code></pre>
</div></div>
<div class="literalblock">
<div class="content">
<pre><code>dump    - read out the meta data from a trace file</code></pre>
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
<strong>-h</strong>, --help
</dt>
<dd>
<p>
    Display the help text.
</p>
</dd>
</dl></div>
<div class="paragraph"><p>Other options see the man page for the corresponding command.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_see_also">SEE ALSO</h2>
<div class="sectionbody">
<div class="paragraph"><p>trace-cmd-record(1), trace-cmd-report(1), trace-cmd-hist(1), trace-cmd-start(1),
trace-cmd-stop(1), trace-cmd-extract(1), trace-cmd-reset(1),
trace-cmd-restore(1), trace-cmd-stack(1), trace-cmd-convert(1),
trace-cmd-split(1), trace-cmd-list(1), trace-cmd-listen(1),
trace-cmd.dat(5), trace-cmd-check-events(1), trace-cmd-stat(1),
trace-cmd-attach(1)</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_author">AUTHOR</h2>
<div class="sectionbody">
<div class="paragraph"><p>Written by Steven Rostedt, <<a href="mailto:rostedt@goodmis.org">rostedt@goodmis.org</a>></p></div>
</div>
</div>
<div class="sect1">
<h2 id="_resources">RESOURCES</h2>
<div class="sectionbody">
<div class="paragraph"><p><a href="https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git/">https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git/</a></p></div>
</div>
</div>
<div class="sect1">
<h2 id="_copying">COPYING</h2>
<div class="sectionbody">
<div class="paragraph"><p>Copyright (C) 2010 Red Hat, Inc. Free use of this software is granted under
the terms of the GNU Public License (GPL).</p></div>
</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
Last updated
 2023-06-07 20:21:00 UTC
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