systemd-bootchart.xml revision 1959c6ce940786d33f91e19c41441bf4c9f6a768
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This file is part of systemd.
Copyright 2012 Intel Corporation
Authors:
Auke Kok <auke-jan.h.kok@intel.com>
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
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<refentry id="systemd-bootchart">
<refentryinfo>
<title>systemd-bootchart</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>systemd-bootchart</refentrytitle>
<manvolnum>1</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-bootchart</refname>
<refpurpose>Boot performance analysis graphing tool</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>Systemd-bootchart is an boot time analysis tool. It represents
various aspects of the system as graph elements. These graph
elements allow the user to determine resource usage, efficiency
and performance issues.</para>
</refsect1>
<refsect1>
<title>Invocation</title>
<para>systemd-bootchart can be invoked in several different ways:</para>
<variablelist class='bootchart-invocation'>
<varlistentry>
<title>Kernel invocation</title>
<listitem><para>The kernel can invoke systemd-bootchart
instead of the init process. In itself, systemd-bootchart
this matter.</para></listitem>
</varlistentry>
<varlistentry>
<title>Started as a standalone program</title>
<listitem><para>One can execute systemd-bootchart as
normal application from the commandline. In this mode
it is highly recommended to pass the "-r" flag in order
to not graph the time elapsed since boot and before
systemd-bootchart was started, as it may result in
extremely large graphs.
</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Options</title>
<para>Please read systemd-bootchart --help or the bootchart.conf manual
page for information about the various options that influence how
systemd-bootchart operates.</para>
</refsect1>
<refsect1>
<title>Output</title>
<para>Systemd-bootchart generates SVG graphs. In order to render these
on a graphical display any SVG capable viewer can be used. It should be
noted that the SVG render engines in most browsers (including Chrome
and Firefox) are many times faster than dedicated graphical applications
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
</para>
</refsect1>
</refentry>