man/bootchart.conf.xml

   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">
   5
   6 <!--
   7   This file is part of systemd.
   8
   9   Copyright 2012 Intel Corporation
  10
  11   Authors:
  12     Auke Kok <auke-jan.h.kok@intel.com>
  13
  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.
  18
  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.
  23
  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/>.
  26 -->
  27
  28 <refentry id="bootchart.conf" conditional='ENABLE_BOOTCHART'
  29           xmlns:xi="http://www.w3.org/2001/XInclude">
  30         <refentryinfo>
  31                 <title>bootchart.conf</title>
  32                 <productname>systemd</productname>
  33
  34                 <authorgroup>
  35                         <author>
  36                                 <contrib>Developer</contrib>
  37                                 <firstname>Auke</firstname>
  38                                 <surname>Kok</surname>
  39                                 <email>auke-jan.h.kok@intel.com</email>
  40                         </author>
  41                 </authorgroup>
  42         </refentryinfo>
  43
  44         <refmeta>
  45                 <refentrytitle>bootchart.conf</refentrytitle>
  46                 <manvolnum>5</manvolnum>
  47         </refmeta>
  48
  49         <refnamediv>
  50                 <refname>bootchart.conf</refname>
  51                 <refname>bootchart.conf.d</refname>
  52                 <refpurpose>Boot performance analysis graphing tool configuration files</refpurpose>
  53         </refnamediv>
  54
  55         <refsynopsisdiv>
  56                 <para><filename>/etc/systemd/bootchart.conf</filename></para>
  57                 <para><filename>/etc/systemd/bootchart.conf.d/*.conf</filename></para>
  58                 <para><filename>/run/systemd/bootchart.conf.d/*.conf</filename></para>
  59                 <para><filename>/usr/lib/systemd/bootchart.conf.d/*.conf</filename></para>
  60         </refsynopsisdiv>
  61
  62         <refsect1>
  63                 <title>Description</title>
  64
  65                 <para>When starting, systemd-bootchart will read the
  66                 configuration file
  67                 <filename>/etc/systemd/bootchart.conf</filename>, followed by
  68                 the files in the <filename>bootchart.conf.d</filename>
  69                 directories.  These configuration files determine logging
  70                 parameters and graph output.</para>
  71         </refsect1>
  72
  73         <xi:include href="standard-conf.xml" xpointer="confd" />
  74         <xi:include href="standard-conf.xml" xpointer="conf" />
  75
  76         <refsect1>
  77                 <title>Options</title>
  78
  79                 <variablelist class='bootchart-directives'>
  80
  81                         <varlistentry>
  82                                 <term><varname>Samples=500</varname></term>
  83                                 <listitem><para>Configure the amount of samples to
  84                                 record in total before bootchart exits. Each sample will
  85                                 record at intervals defined by Frequency=.</para></listitem>
  86                         </varlistentry>
  87
  88                         <varlistentry>
  89                                 <term><varname>Frequency=25</varname></term>
  90                                 <listitem><para>Configure the sample log frequency.
  91                                 This can be a fractional number, but must be larger than
  92                                 0.0. Most systems can cope with values under 25-50 without
  93                                 impacting boot time severely.</para></listitem>
  94                         </varlistentry>
  95
  96                         <varlistentry>
  97                                 <term><varname>Relative=no</varname></term>
  98                                 <listitem><para>Configures whether the left axis of the
  99                                 output graph equals time=0.0 (<constant>CLOCK_MONOTONIC</constant> start). This
 100                                 is useful for using bootchart at post-boot time to profile
 101                                 an already booted system, otherwise the graph would become
 102                                 extremely large. If set to yes, the horizontal axis starts
 103                                 at the first recorded sample instead of time=0.0.
 104                                 </para></listitem>
 105                         </varlistentry>
 106
 107                         <varlistentry>
 108                                 <term><varname>Filter=no</varname></term>
 109                                 <listitem><para>Configures whether the resulting graph
 110                                 should omit tasks that did not contribute significantly
 111                                 to the boot. Processes that are too short-lived (only
 112                                 seen in one sample) or that do not consume any significant
 113                                 CPU time (less than 0.001sec) will not be displayed in
 114                                 the output graph.</para></listitem>
 115                         </varlistentry>
 116
 117                         <varlistentry>
 118                                 <term><varname>Output=[path]</varname></term>
 119                                 <listitem><para>Configures the output directory for writing
 120                                 the graphs. By default, bootchart writes the graphs to
 121                                 <filename>/run/log</filename>.</para></listitem>
 122                         </varlistentry>
 123
 124                         <varlistentry>
 125                                 <term><varname>Init=[path]</varname></term>
 126                                 <listitem><para>Configures bootchart to run a non-standard
 127                                 binary instead of <filename>/sbin/init</filename>. This
 128                                 option is only relevant if bootchart was invoked from the
 129                                 kernel command line with
 130                                 init=/usr/lib/systemd/systemd-bootchart.</para></listitem>
 131                         </varlistentry>
 132
 133                         <varlistentry>
 134                                 <term><varname>PlotMemoryUsage=no</varname></term>
 135                                 <listitem><para>If set to yes, enables logging and graphing
 136                                 of processes' PSS memory consumption.</para></listitem>
 137                         </varlistentry>
 138
 139                         <varlistentry>
 140                                 <term><varname>PlotEntropyGraph=no</varname></term>
 141                                 <listitem><para>If set to yes, enables logging and graphing
 142                                 of the kernel random entropy pool size.</para></listitem>
 143                         </varlistentry>
 144
 145                         <varlistentry>
 146                                 <term><varname>ScaleX=100</varname></term>
 147                                 <listitem><para>Horizontal scaling factor for all variable
 148                                 graph components.</para></listitem>
 149                         </varlistentry>
 150
 151                         <varlistentry>
 152                                 <term><varname>ScaleY=20</varname></term>
 153                                 <listitem><para>Vertical scaling factor for all variable
 154                                 graph components.</para></listitem>
 155                         </varlistentry>
 156
 157                         <varlistentry>
 158                                 <term><varname>ControlGroup=no</varname></term>
 159                                 <listitem><para>Display process control group.</para></listitem>
 160                         </varlistentry>
 161
 162                 </variablelist>
 163         </refsect1>
 164
 165         <refsect1>
 166                   <title>See Also</title>
 167                   <para>
 168                           <citerefentry><refentrytitle>systemd-bootchart</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 169                           <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
 170                   </para>
 171         </refsect1>
 172
 173 </refentry>