systemd/man/systemd-bootchart.xml

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  Copyright 2012 Intel Corporation

  Authors:
    Auke Kok <auke-jan.h.kok@intel.com>

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<refentry id="systemd-bootchart" conditional='ENABLE_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>

                        <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>