1 <?xml version='1.0'?> <!--*-nxml-*-->
2 <?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
3 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
4 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
7 This file is part of systemd.
9 Copyright 2012 Intel Corporation
12 Auke Kok <auke-jan.h.kok@intel.com>
14 systemd is free software; you can redistribute it and/or modify it
15 under the terms of the GNU Lesser General Public License as published by
16 the Free Software Foundation; either version 2.1 of the License, or
17 (at your option) any later version.
19 systemd is distributed in the hope that it will be useful, but
20 WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 Lesser General Public License for more details.
24 You should have received a copy of the GNU Lesser General Public License
25 along with systemd; If not, see <http://www.gnu.org/licenses/>.
28 <refentry id="systemd-bootchart">
30 <title>systemd-bootchart</title>
31 <productname>systemd</productname>
35 <contrib>Developer</contrib>
36 <firstname>Auke</firstname>
37 <surname>Kok</surname>
38 <email>auke-jan.h.kok@intel.com</email>
44 <refentrytitle>systemd-bootchart</refentrytitle>
45 <manvolnum>1</manvolnum>
49 <refname>systemd-bootchart</refname>
50 <refpurpose>Boot performance analysis graphing tool</refpurpose>
54 <title>Description</title>
56 <para>Systemd-bootchart is an boot time analysis tool. It represents
57 various aspects of the system as graph elements. These graph
58 elements allow the user to determine resource usage, efficiency
59 and performance issues.</para>
64 <title>Invocation</title>
66 <para>systemd-bootchart can be invoked in several different ways:</para>
68 <variablelist class='bootchart-invocation'>
71 <title>Kernel invocation</title>
72 <listitem><para>The kernel can invoke systemd-bootchart
73 instead of the init process. In itself, systemd-bootchart
74 will invoke <filename>/sbin/init</filename> if invoked in
75 this matter.</para></listitem>
79 <title>Started as a standalone program</title>
80 <listitem><para>One can execute systemd-bootchart as
81 normal application from the commandline. In this mode
82 it is highly recommended to pass the "-r" flag in order
83 to not graph the time elapsed since boot and before
84 systemd-bootchart was started, as it may result in
85 extremely large graphs.
92 <title>Options</title>
94 <para>Please read systemd-bootchart --help or the bootchart.conf manual
95 page for information about the various options that influence how
96 systemd-bootchart operates.</para>
100 <title>Output</title>
102 <para>Systemd-bootchart generates SVG graphs. In order to render these
103 on a graphical display any SVG capable viewer can be used. It should be
104 noted that the SVG render engines in most browsers (including Chrome
105 and Firefox) are many times faster than dedicated graphical applications
106 like Gimp and Inkscape. Just point your browser at "file:///var/log"!
111 <title>See Also</title>
113 <citerefentry><refentrytitle>bootchart.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>