blob: 419554e2d1749d13017c5553b0c682abd36daf6f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
<?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="bootchart.conf" conditional='ENABLE_BOOTCHART'>
<refentryinfo>
<title>bootchart.conf</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>bootchart.conf</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>bootchart.conf</refname>
<refpurpose>Boot performance analysis graphing tool configuration file</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>/etc/systemd/bootchart.conf</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>When starting, systemd-bootchart will read the
configuration file <filename>bootchart.conf</filename>.
This configuration file determines logging parameters and
graph output.</para>
</refsect1>
<refsect1>
<title>Options</title>
<variablelist class='bootchart-directives'>
<varlistentry>
<term><varname>samples=500</varname></term>
<listitem><para>Configure the amount of samples to
record total before bootchart exits. Each sample will
record at intervals defined by freq=.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>freq=25</varname></term>
<listitem><para>Configure the sample log frequency.
This can be a fractional number, but must be larger than
0.0. Most systems can cope with values under 25-50 without
impacting boot time severely.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>rel=0</varname></term>
<listitem><para>Configures whether the left axis of the
output graph equals time=0.0 (CLOCK_MONOTONIC start). This
is useful for using bootchart at post-boot time to profile
an already booted system, otherwise the graph would become
extremely large. If set to a non-zero value, the horizontal
axis starts at the first recorded sample instead of time=0.0.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>filter=0</varname></term>
<listitem><para>Configures whether the resulting graph
should omit tasks that did not contribute significantly
to the boot. Processes that are too short-lived (only
seen in one sample) or that do not consume any significant
CPU time (less than 0.001sec) will not be displayed in
the output graph.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>output=[path]</varname></term>
<listitem><para>Configures the output folder for writing
the graphs. By default, bootchart writes the graphs to
<filename>/var/log</filename>.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>init=[path]</varname></term>
<listitem><para>Configures bootchart to run a non-standard
binary instead of <filename>/sbin/init</filename>. This
option is only relevant if bootchart was invoked from the
kernel command line with
init=/usr/lib/systemd/systemd-bootchart.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>pss=0</varname></term>
<listitem><para>If set to 1, enables logging and graphing
of processes PSS memory consumption.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>entropy=0</varname></term>
<listitem><para>If set to 1, enables logging and graphing
of the kernel random entropy pool size.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>scale_x=100</varname></term>
<listitem><para>Horizontal scaling factor for all variable
graph components.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>scale_y=20</varname></term>
<listitem><para>Vertical scaling factor for all variable
graph components.</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd-bootchart</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
|
