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<img alt="Erlang logo" src="../../../../doc/erlang-logo.png"><br><small><a href="users_guide.html">User's Guide</a><br><a href="index.html">Reference Manual</a><br><a href="release_notes.html">Release Notes</a><br><a href="../pdf/et-1.4.4.2.pdf">PDF</a><br><a href="../../../../doc/index.html">Top</a></small><p><strong>Event Tracer (ET)</strong><br><strong>User's Guide</strong><br><small>Version 1.4.4.2</small></p>
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<h1>1 Introduction</h1>
<p>The <span class="code">Event Tracer (ET)</span> uses the built-in trace mechanism in
Erlang and provides tools for collection and graphical viewing of
trace data.</p>
<p>The viewed trace data is normally collected from Erlang trace
ports or files.</p>
<h3><a name="id64170">1.1
Scope and Purpose</a></h3>
<p>This manual describes the <span class="code">Event Tracer (ET)</span> application,
as a component of the Erlang/Open Telecom Platform development
environment. It is assumed that the reader is familiar with the
Erlang Development Environment, which is described in a separate
User's Guide.</p>
<h3><a name="id61234">1.2
Prerequisites</a></h3>
<p>The following prerequisites is required for understanding the
material in the <span class="code">Event Tracer (ET)</span> User's Guide:</p>
<ul>
<li>
<p>familiarity with the Erlang system and Erlang programming
in general and the especially the art of Erlang tracing.</p>
</li>
</ul>
<p>The application requires Erlang/OTP release R13BB or later. If
you use the old <span class="code">GS</span> based GUI it does suffice with R7B.</p>
<h3><a name="id61059">1.3
About This Manual</a></h3>
<p>In addition to this introductory chapter, the <span class="code">Event
Tracers</span> User's Guide contains the following chapters:</p>
<ul>
<li>
<p>Chapter 2: "Tutorial" provides a walk-through of the
various parts of the application. The tutorial is based on
<span class="code">Jayson Vantuyl's</span> article
<span class="code">http://souja.net/2009/04/making-sense-of-erlangs-event-tracer.html</span>.</p>
</li>
<li>
<p>Chapter 3: "Description" describes the architecture and typical
usage of the application.</p>
</li>
<li>
<p>Chapter 4: "Advanced examples" gives some usage examples</p>
</li>
</ul>
<h3><a name="id60052">1.4
Where to Find More Information</a></h3>
<p>Refer to the following documentation for more information about
<span class="code">Event Tracer (ET)</span> and about the Erlang/OTP development system:</p>
<ul>
<li>
<p>the Reference Manual of the <span class="code">Event Tracer (ET)</span>.</p>
</li>
<li>
<p>documentation of basic tracing in <span class="code">erlang:trace/4</span> and
<span class="code">erlang:trace_pattern/3</span> and then the utilities derived
from these: <span class="code">dbg</span>, <span class="code">observer</span>, <span class="code">invisio</span> and
<span class="code">et</span>.</p>
</li>
<li>
<p>Programming Erlang: Software for a Concurrent World by Joe
Armstrong; ISBN: 978-1-93435-600-5</p>
</li>
</ul>
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