chiark / gitweb /
tmpfiles: port to unquote_many_words()
[elogind.git] / man / bootchart.conf.xml
1 <?xml version='1.0'?> <!--*-nxml-*-->
2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
3   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
4
5 <!--
6   This file is part of systemd.
7
8   Copyright 2012 Intel Corporation
9
10   Authors:
11     Auke Kok <auke-jan.h.kok@intel.com>
12
13   systemd is free software; you can redistribute it and/or modify it
14   under the terms of the GNU Lesser General Public License as published by
15   the Free Software Foundation; either version 2.1 of the License, or
16   (at your option) any later version.
17
18   systemd is distributed in the hope that it will be useful, but
19   WITHOUT ANY WARRANTY; without even the implied warranty of
20   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21   Lesser General Public License for more details.
22
23   You should have received a copy of the GNU Lesser General Public License
24   along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 -->
26
27 <refentry id="bootchart.conf" conditional='ENABLE_BOOTCHART'
28     xmlns:xi="http://www.w3.org/2001/XInclude">
29   <refentryinfo>
30     <title>bootchart.conf</title>
31     <productname>systemd</productname>
32
33     <authorgroup>
34       <author>
35         <contrib>Developer</contrib>
36         <firstname>Auke</firstname>
37         <surname>Kok</surname>
38         <email>auke-jan.h.kok@intel.com</email>
39       </author>
40     </authorgroup>
41   </refentryinfo>
42
43   <refmeta>
44     <refentrytitle>bootchart.conf</refentrytitle>
45     <manvolnum>5</manvolnum>
46   </refmeta>
47
48   <refnamediv>
49     <refname>bootchart.conf</refname>
50     <refname>bootchart.conf.d</refname>
51     <refpurpose>Boot performance analysis graphing tool configuration files</refpurpose>
52   </refnamediv>
53
54   <refsynopsisdiv>
55     <para><filename>/etc/systemd/bootchart.conf</filename></para>
56     <para><filename>/etc/systemd/bootchart.conf.d/*.conf</filename></para>
57     <para><filename>/run/systemd/bootchart.conf.d/*.conf</filename></para>
58     <para><filename>/usr/lib/systemd/bootchart.conf.d/*.conf</filename></para>
59   </refsynopsisdiv>
60
61   <refsect1>
62     <title>Description</title>
63
64     <para>When starting, systemd-bootchart will read the configuration
65     file <filename>/etc/systemd/bootchart.conf</filename>, followed by
66     the files in the <filename>bootchart.conf.d</filename>
67     directories. These configuration files determine logging
68     parameters and graph output.</para>
69   </refsect1>
70
71   <xi:include href="standard-conf.xml" xpointer="main-conf" />
72
73   <refsect1>
74     <title>Options</title>
75
76     <variablelist class='bootchart-directives'>
77
78       <varlistentry>
79         <term><varname>Samples=500</varname></term>
80         <listitem><para>Configure the amount of samples to record in
81         total before bootchart exits. Each sample will record at
82         intervals defined by Frequency=.</para></listitem>
83       </varlistentry>
84
85       <varlistentry>
86         <term><varname>Frequency=25</varname></term>
87         <listitem><para>Configure the sample log frequency. This can
88         be a fractional number, but must be larger than 0.0. Most
89         systems can cope with values under 25-50 without impacting
90         boot time severely.</para></listitem>
91       </varlistentry>
92
93       <varlistentry>
94         <term><varname>Relative=no</varname></term>
95         <listitem><para>Configures whether the left axis of the output
96         graph equals time=0.0 (<constant>CLOCK_MONOTONIC</constant>
97         start). This is useful for using bootchart at post-boot time
98         to profile an already booted system, otherwise the graph would
99         become extremely large. If set to yes, the horizontal axis
100         starts at the first recorded sample instead of time=0.0.
101         </para></listitem>
102       </varlistentry>
103
104       <varlistentry>
105         <term><varname>Filter=no</varname></term>
106         <listitem><para>Configures whether the resulting graph should
107         omit tasks that did not contribute significantly to the boot.
108         Processes that are too short-lived (only seen in one sample)
109         or that do not consume any significant CPU time (less than
110         0.001sec) will not be displayed in the output
111         graph.</para></listitem>
112       </varlistentry>
113
114       <varlistentry>
115         <term><varname>Output=[path]</varname></term>
116         <listitem><para>Configures the output directory for writing
117         the graphs. By default, bootchart writes the graphs to
118         <filename>/run/log</filename>.</para></listitem>
119       </varlistentry>
120
121       <varlistentry>
122         <term><varname>Init=[path]</varname></term>
123         <listitem><para>Configures bootchart to run a non-standard
124         binary instead of
125         <filename>/usr/lib/systemd/systemd</filename>. This option is
126         only relevant if bootchart was invoked from the kernel command
127         line with
128         init=/usr/lib/systemd/systemd-bootchart.</para></listitem>
129       </varlistentry>
130
131       <varlistentry>
132         <term><varname>PlotMemoryUsage=no</varname></term>
133         <listitem><para>If set to yes, enables logging and graphing of
134         processes' PSS memory consumption.</para></listitem>
135       </varlistentry>
136
137       <varlistentry>
138         <term><varname>PlotEntropyGraph=no</varname></term>
139         <listitem><para>If set to yes, enables logging and graphing of
140         the kernel random entropy pool size.</para></listitem>
141       </varlistentry>
142
143       <varlistentry>
144         <term><varname>ScaleX=100</varname></term>
145         <listitem><para>Horizontal scaling factor for all variable
146         graph components.</para></listitem>
147       </varlistentry>
148
149       <varlistentry>
150         <term><varname>ScaleY=20</varname></term>
151         <listitem><para>Vertical scaling factor for all variable graph
152         components.</para></listitem>
153       </varlistentry>
154
155       <varlistentry>
156         <term><varname>ControlGroup=no</varname></term>
157         <listitem><para>Display process control group.
158         </para></listitem>
159       </varlistentry>
160
161     </variablelist>
162   </refsect1>
163
164   <refsect1>
165       <title>See Also</title>
166       <para>
167         <citerefentry><refentrytitle>systemd-bootchart</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
168         <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
169       </para>
170   </refsect1>
171
172 </refentry>