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-<?xml version='1.0'?> <!--*-nxml-*-->
-<!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 Lennart Poettering
-
- 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="systemd-analyze">
-
- <refentryinfo>
- <title>systemd-analyze</title>
- <productname>systemd</productname>
-
- <authorgroup>
- <author>
- <contrib>Developer</contrib>
- <firstname>Lennart</firstname>
- <surname>Poettering</surname>
- <email>lennart@poettering.net</email>
- </author>
- </authorgroup>
- </refentryinfo>
-
- <refmeta>
- <refentrytitle>systemd-analyze</refentrytitle>
- <manvolnum>1</manvolnum>
- </refmeta>
-
- <refnamediv>
- <refname>systemd-analyze</refname>
- <refpurpose>Analyze system boot-up performance</refpurpose>
- </refnamediv>
-
- <refsynopsisdiv>
- <cmdsynopsis>
- <command>systemd-analyze <arg choice="opt" rep="repeat">OPTIONS</arg> time</command>
- </cmdsynopsis>
- <cmdsynopsis>
- <command>systemd-analyze <arg choice="opt" rep="repeat">OPTIONS</arg> blame </command>
- </cmdsynopsis>
- <cmdsynopsis>
- <command>systemd-analyze <arg choice="opt" rep="repeat">OPTIONS</arg> plot <arg choice="opt">&gt; file.svg</arg></command>
- </cmdsynopsis>
- </refsynopsisdiv>
-
- <refsect1>
- <title>Description</title>
-
- <para><command>systemd-analyze</command> may be used
- to determine system boot-up performance of the current
- boot.</para>
-
- <para><command>systemd-analyze time</command>
- prints the time spent in the kernel before
- userspace has been reached, the time spent in the
- initial RAM disk (initrd) before normal system
- userspace has been reached and the time normal system
- userspace took to initialize. Note that these
- measurements simply measure the time passed up to the
- point where all system services have been spawned, but
- not necessarily until they fully finished
- initialization or the disk is idle.</para>
-
- <para><command>systemd-analyze blame</command> prints
- a list of all running units, ordered by the time they
- took to initialize. This information may be used to
- optimize boot-up times. Note that the output might be
- misleading as the initialization of one service might
- be slow simply because it waits for the initialization
- of another service to complete.</para>
-
- <para><command>systemd-analyze plot</command> prints
- an SVG graphic detailing which system services have
- been started at what time, highlighting the time they
- spent on initialization.</para>
-
- <para>If no command is passed <command>systemd-analyze
- time</command> is implied.</para>
-
- </refsect1>
-
- <refsect1>
- <title>Options</title>
-
- <para>The following options are understood:</para>
-
- <variablelist>
- <varlistentry>
- <term><option>-h</option></term>
- <term><option>--help</option></term>
-
- <listitem><para>Prints a short help
- text and exits.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><option>--user</option></term>
-
- <listitem><para>Shows performance data
- of user sessions instead of the system
- manager.</para></listitem>
- </varlistentry>
- </variablelist>
-
- </refsect1>
-
- <refsect1>
- <title>Exit status</title>
-
- <para>On success 0 is returned, a non-zero failure
- code otherwise.</para>
- </refsect1>
-
- <refsect1>
- <title>See Also</title>
- <para>
- <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
- </para>
- </refsect1>
-
-</refentry>