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<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
This file is part of systemd.
Copyright 2012 Intel Corporation
Authors:
Auke Kok <auke-jan.h.kok@intel.com>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="bootchart.conf" conditional='ENABLE_BOOTCHART'
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>bootchart.conf</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Auke</firstname>
<surname>Kok</surname>
<email>auke-jan.h.kok@intel.com</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>bootchart.conf</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>bootchart.conf</refname>
<refname>bootchart.conf.d</refname>
<refpurpose>Boot performance analysis graphing tool configuration files</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>/etc/systemd/bootchart.conf</filename></para>
<para><filename>/etc/systemd/bootchart.conf.d/*.conf</filename></para>
<para><filename>/run/systemd/bootchart.conf.d/*.conf</filename></para>
<para><filename>/usr/lib/systemd/bootchart.conf.d/*.conf</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>When starting, systemd-bootchart will read the configuration
file <filename>/etc/systemd/bootchart.conf</filename>, followed by
the files in the <filename>bootchart.conf.d</filename>
directories. These configuration files determine logging
parameters and graph output.</para>
</refsect1>
<xi:include href="standard-conf.xml" xpointer="main-conf" />
<refsect1>
<title>Options</title>
<variablelist class='bootchart-directives'>
<varlistentry>
<term><varname>Samples=500</varname></term>
<listitem><para>Configure the amount of samples to record in
total before bootchart exits. Each sample will record at
intervals defined by Frequency=.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>Frequency=25</varname></term>
<listitem><para>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.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>Relative=no</varname></term>
<listitem><para>Configures whether the left axis of the output
graph equals time=0.0 (<constant>CLOCK_MONOTONIC</constant>
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.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>Filter=no</varname></term>
<listitem><para>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.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>Output=[path]</varname></term>
<listitem><para>Configures the output directory for writing
the graphs. By default, bootchart writes the graphs to
<filename>/run/log</filename>.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>Init=[path]</varname></term>
<listitem><para>Configures bootchart to run a non-standard
binary instead of
<filename>/usr/lib/systemd/systemd</filename>. This option is
only relevant if bootchart was invoked from the kernel command
line with
init=/usr/lib/systemd/systemd-bootchart.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>PlotMemoryUsage=no</varname></term>
<listitem><para>If set to yes, enables logging and graphing of
processes' PSS memory consumption.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>PlotEntropyGraph=no</varname></term>
<listitem><para>If set to yes, enables logging and graphing of
the kernel random entropy pool size.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>ScaleX=100</varname></term>
<listitem><para>Horizontal scaling factor for all variable
graph components.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>ScaleY=20</varname></term>
<listitem><para>Vertical scaling factor for all variable graph
components.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>ControlGroup=no</varname></term>
<listitem><para>Display process control group.
</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd-bootchart</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
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