160 lines
7.4 KiB
XML
160 lines
7.4 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2012 Intel Corporation
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Authors:
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Auke Kok <auke-jan.h.kok@intel.com>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="bootchart.conf">
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<refentryinfo>
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<title>bootchart.conf</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Auke</firstname>
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<surname>Kok</surname>
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<email>auke-jan.h.kok@intel.com</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>bootchart.conf</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>bootchart.conf</refname>
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<refpurpose>Boot performance analysis graphing tool configuration file</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>/etc/systemd/bootchart.conf</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>When starting, systemd-bootchart will read the
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configuration file <filename>bootchart.conf</filename>.
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This configuration file determines logging parameters and
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graph output.</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<variablelist class='bootchart-directives'>
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<varlistentry>
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<term><varname>samples=500</varname></term>
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<listitem><para>Configure the amount of samples to
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record total before bootchart exits. Each sample will
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record at intervals defined by freq=.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>freq=25</varname></term>
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<listitem><para>Configure the sample log frequency.
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This can be a fractional number, but must be larger than
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0.0. Most systems can cope with values under 25-50 without
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impacting boot time severely.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>rel=0</varname></term>
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<listitem><para>Configures whether the left axis of the
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output graph equals time=0.0 (CLOCK_MONOTONIC start). This
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is useful for using bootchart at post-boot time to profile
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an already booted system, otherwise the graph would become
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extremely large. If set to a non-zero value, the horizontal
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axis starts at the first recorded sample instead of time=0.0.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>filter=0</varname></term>
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<listitem><para>Configures whether the resulting graph
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should omit tasks that did not contribute significantly
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to the boot. Processes that are too short-lived (only
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seen in one sample) or that do not consume any significant
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CPU time (less than 0.001sec) will not be displayed in
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the output graph.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>output=[path]</varname></term>
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<listitem><para>Configures the output folder for writing
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the graphs. By default, bootchart writes the graphs to
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<filename>/var/log</filename>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>init=[path]</varname></term>
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<listitem><para>Configures bootchart to run a non-standard
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binary instead of <filename>/sbin/init</filename>. This
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option is only relevant if bootchart was invoked from the
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kernel command line with
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init=/usr/lib/systemd/systemd-bootchart.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>pss=0</varname></term>
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<listitem><para>If set to 1, enables logging and graphing
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of processes PSS memory consumption.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>entropy=0</varname></term>
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<listitem><para>If set to 1, enables logging and graphing
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of the kernel random entropy pool size.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>scale_x=100</varname></term>
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<listitem><para>Horizontal scaling factor for all variable
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graph components.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>scale_y=20</varname></term>
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<listitem><para>Vertical scaling factor for all variable
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graph components.</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd-bootchart</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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