mirror of
https://github.com/AuxXxilium/eudev.git
synced 2024-12-28 06:35:34 +07:00
139 lines
5.5 KiB
XML
139 lines
5.5 KiB
XML
<?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">> 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>
|