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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>bootchart.conf</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><style>
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<a href="../libudev/index.html">gudev </a><span style="float:right">systemd 215</span><hr><div class="refentry"><a name="bootchart.conf"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>bootchart.conf — Boot performance analysis graphing tool configuration file</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><p><code class="filename">/etc/systemd/bootchart.conf</code></p></div><div class="refsect1"><a name="idm214168376384"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p>When starting, systemd-bootchart will read the
configuration file <code class="filename">bootchart.conf</code>.
This configuration file determines logging parameters and
graph output.</p></div><div class="refsect1"><a name="idm214170469440"></a><h2 id="Options">Options<a class="headerlink" title="Permalink to this headline" href="#Options">¶</a></h2><div class="variablelist"><dl class="variablelist"><dt id="Samples=500"><span class="term"><code class="varname">Samples=500</code></span><a class="headerlink" title="Permalink to this term" href="#Samples=500">¶</a></dt><dd><p>Configure the amount of samples to
record in total before bootchart exits. Each sample will
record at intervals defined by Frequency=.</p></dd><dt id="Frequency=25"><span class="term"><code class="varname">Frequency=25</code></span><a class="headerlink" title="Permalink to this term" href="#Frequency=25">¶</a></dt><dd><p>Configure the sample log frequency.
This can be a fractional number, but must be larger than
0.0. Most systems can cope with values under 25-50 without
impacting boot time severely.</p></dd><dt id="Relative=no"><span class="term"><code class="varname">Relative=no</code></span><a class="headerlink" title="Permalink to this term" href="#Relative=no">¶</a></dt><dd><p>Configures whether the left axis of the
output graph equals time=0.0 (<code class="constant">CLOCK_MONOTONIC</code> start). This
is useful for using bootchart at post-boot time to profile
an already booted system, otherwise the graph would become
extremely large. If set to yes, the horizontal axis starts
at the first recorded sample instead of time=0.0.
</p></dd><dt id="Filter=no"><span class="term"><code class="varname">Filter=no</code></span><a class="headerlink" title="Permalink to this term" href="#Filter=no">¶</a></dt><dd><p>Configures whether the resulting graph
should omit tasks that did not contribute significantly
to the boot. Processes that are too short-lived (only
seen in one sample) or that do not consume any significant
CPU time (less than 0.001sec) will not be displayed in
the output graph.</p></dd><dt id="Output=[path]"><span class="term"><code class="varname">Output=[path]</code></span><a class="headerlink" title="Permalink to this term" href="#Output=%5Bpath%5D">¶</a></dt><dd><p>Configures the output directory for writing
the graphs. By default, bootchart writes the graphs to
<code class="filename">/run/log</code>.</p></dd><dt id="Init=[path]"><span class="term"><code class="varname">Init=[path]</code></span><a class="headerlink" title="Permalink to this term" href="#Init=%5Bpath%5D">¶</a></dt><dd><p>Configures bootchart to run a non-standard
binary instead of <code class="filename">/sbin/init</code>. This
option is only relevant if bootchart was invoked from the
kernel command line with
init=/usr/lib/systemd/systemd-bootchart.</p></dd><dt id="PlotMemoryUsage=no"><span class="term"><code class="varname">PlotMemoryUsage=no</code></span><a class="headerlink" title="Permalink to this term" href="#PlotMemoryUsage=no">¶</a></dt><dd><p>If set to yes, enables logging and graphing
of processes' PSS memory consumption.</p></dd><dt id="PlotEntropyGraph=no"><span class="term"><code class="varname">PlotEntropyGraph=no</code></span><a class="headerlink" title="Permalink to this term" href="#PlotEntropyGraph=no">¶</a></dt><dd><p>If set to yes, enables logging and graphing
of the kernel random entropy pool size.</p></dd><dt id="ScaleX=100"><span class="term"><code class="varname">ScaleX=100</code></span><a class="headerlink" title="Permalink to this term" href="#ScaleX=100">¶</a></dt><dd><p>Horizontal scaling factor for all variable
graph components.</p></dd><dt id="ScaleY=20"><span class="term"><code class="varname">ScaleY=20</code></span><a class="headerlink" title="Permalink to this term" href="#ScaleY=20">¶</a></dt><dd><p>Vertical scaling factor for all variable
graph components.</p></dd><dt id="ControlGroup=no"><span class="term"><code class="varname">ControlGroup=no</code></span><a class="headerlink" title="Permalink to this term" href="#ControlGroup=no">¶</a></dt><dd><p>Display process control group.</p></dd></dl></div></div><div class="refsect1"><a name="idm214170612832"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
<a href="systemd-bootchart.html"><span class="citerefentry"><span class="refentrytitle">systemd-bootchart</span>(1)</span></a>,
<a href="systemd.directives.html"><span class="citerefentry"><span class="refentrytitle">systemd.directives</span>(7)</span></a>
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