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README.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>CPU Thermal Frequency Daemon</title>
<!-- 2014-06-24 Tue 23:13 -->
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<meta name="author" content="Dan Muresan">
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<body>
<div id="content">
<h1 class="title">CPU Thermal Frequency Daemon</h1>
<p>
<i>Frequency daemon focused on preventing thermal shutdown</i>
</p>
<dl class="org-dl">
<dt> Home page </dt><dd><a href="http://danmbox.github.com/cputhermalfreqd">http://danmbox.github.com/cputhermalfreqd</a>
</dd>
<dt> Downloads </dt><dd><a href="https://github.com/danmbox/cputhermalfreqd">github</a>, <a href="https://github.com/danmbox/cputhermalfreqd/releases">releases</a>
</dd>
<dt> Author </dt><dd><a href="http://alumnus.caltech.edu/~muresan/">Dan A. Muresan</a> (danmbox at gmail dot com)
</dd>
</dl>
<div id="outline-container-sec-1" class="outline-2">
<h2 id="sec-1"><span class="section-number-2">1</span> DESCRIPTION</h2>
<div class="outline-text-2" id="text-1">
<p>
<a href="http://danmbox.github.com/cputhermalfreqd">cputhermalfreqd</a> is a
daemon that controls the CPU speed using the cpufreq drivers. Unlike
other similar daemons, it is focused on slowing down your CPU once
the system gets too hot, thus preventing inopportune thermal
shutdowns (and thermal shutdowns are <i>never</i> opportune).
</p>
<p>
<code>cputhermalfreqd</code> initially figures out what sensors are available
by <code>strace</code>-ing the <code>sensors</code> command. It then monitors them
periodically, and changes CPU speed via the <code>cpufreq-set</code> command
according to temperature thresholds defined by the user.
</p>
</div>
</div>
<div id="outline-container-sec-2" class="outline-2">
<h2 id="sec-2"><span class="section-number-2">2</span> DEPENDENCIES</h2>
<div class="outline-text-2" id="text-2">
<ul class="org-ul">
<li>Python 2.7
</li>
<li><a href="http://lm-sensors.org/">lm-sensors</a>
</li>
<li><a href="http://www.kernel.org/pub/linux/utils/kernel/cpufreq/">cpufrequtils</a>
</li>
<li>strace
</li>
</ul>
</div>
</div>
<div id="outline-container-sec-3" class="outline-2">
<h2 id="sec-3"><span class="section-number-2">3</span> INSTALLING</h2>
<div class="outline-text-2" id="text-3">
<p>
Run <code>cputhermalfreqd</code> directly as below.
</p>
</div>
</div>
<div id="outline-container-sec-4" class="outline-2">
<h2 id="sec-4"><span class="section-number-2">4</span> RUNNING</h2>
<div class="outline-text-2" id="text-4">
<p>
<code>cputhermalfreqd</code> expects a decreasing list of temperature
thresholds expressed as degrees Celsius below the critical
temperature. For example <code>cputhermalfreq 23 18 12</code> means
</p>
<ul class="org-ul">
<li>run at the fastest CPU speed so long as all sensors are at least 23°C
below their critical temperature
</li>
<li>then switch to the 2nd fastest speed so long as all sensors have
at least 18°C to go
</li>
<li>then to the 3rd speed step (until at least one sensors is within
12°C of its critical temperature)
</li>
<li>finally switch to the 4th speed step
</li>
</ul>
<p>
If the temperature decreases, <code>cputhermalfreqd</code> increases CPU speed
correspondingly.
</p>
</div>
</div>
<div id="outline-container-sec-5" class="outline-2">
<h2 id="sec-5"><span class="section-number-2">5</span> COPYRIGHT</h2>
<div class="outline-text-2" id="text-5">
<p>
Copyright 2013-2014 Dan A. Muresan
</p>
<p>
See LICENSE.txt for licensing information.
</p>
</div>
</div>
</div>
</body>
</html>