<?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"> <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> </para> </refsect1> </refentry>