<?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="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 will invoke <filename>/sbin/init</filename> if invoked in 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 like Gimp and Inkscape. Just point your browser at "file:///var/log"! </para> </refsect1> <refsect1> <title>See Also</title> <para> <citerefentry><refentrytitle>bootchart.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> </para> </refsect1> </refentry>