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<?xml version='1.0'?> <!--*-nxml-*-->
<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
<!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'>
<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>
<refpurpose>Boot performance analysis graphing tool configuration file</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>/etc/systemd/bootchart.conf</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>When starting, systemd-bootchart will read the
configuration file <filename>bootchart.conf</filename>.
This configuration file determines logging parameters and
graph output.</para>
</refsect1>
<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>/sbin/init</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>
</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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