mirror of
https://github.com/systemd/systemd
synced 2024-11-05 18:25:39 +00:00
f8b68539d0
When wrong element types are used, directives are sometimes placed in the wrong section. Also, strip part of text starting with "'", which is used in a few places and which is displayed improperly in the index.
356 lines
13 KiB
XML
356 lines
13 KiB
XML
<?xml version='1.0'?>
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
|
|
|
<refentry id="systemd-cgtop"
|
|
xmlns:xi="http://www.w3.org/2001/XInclude">
|
|
|
|
<refentryinfo>
|
|
<title>systemd-cgtop</title>
|
|
<productname>systemd</productname>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>systemd-cgtop</refentrytitle>
|
|
<manvolnum>1</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>systemd-cgtop</refname>
|
|
<refpurpose>Show top control groups by their resource usage</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<cmdsynopsis>
|
|
<command>systemd-cgtop</command>
|
|
<arg choice="opt" rep="repeat">OPTIONS</arg>
|
|
<arg choice="opt">GROUP</arg>
|
|
</cmdsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><command>systemd-cgtop</command> shows the top control
|
|
groups of the local Linux control group hierarchy, ordered by
|
|
their CPU, memory, or disk I/O load. The display is refreshed in
|
|
regular intervals (by default every 1s), similar in style to
|
|
<citerefentry project='man-pages'><refentrytitle>top</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
|
|
If a control group path is specified, shows only the services of
|
|
the specified control group.</para>
|
|
|
|
<para>If <command>systemd-cgtop</command> is not connected to a
|
|
tty, no column headers are printed and the default is to only run
|
|
one iteration. The <option>--iterations=</option> argument, if
|
|
given, is honored. This mode is suitable for scripting.</para>
|
|
|
|
<para>Resource usage is only accounted for control groups in the
|
|
relevant hierarchy, i.e. CPU usage is only accounted for control
|
|
groups in the <literal>cpuacct</literal> hierarchy, memory usage
|
|
only for those in <literal>memory</literal> and disk I/O usage for
|
|
those in <literal>blkio</literal>. If resource monitoring for
|
|
these resources is required, it is recommended to add the
|
|
<varname>CPUAccounting=1</varname>,
|
|
<varname>MemoryAccounting=1</varname> and
|
|
<varname>BlockIOAccounting=1</varname> settings in the unit files
|
|
in question. See
|
|
<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details.</para>
|
|
|
|
<para>The CPU load value can be between 0 and 100 times the number of
|
|
processors the system has. For example, if the system has 8 processors,
|
|
the CPU load value is going to be between 0% and 800%. The number of
|
|
processors can be found in <literal>/proc/cpuinfo</literal>.</para>
|
|
|
|
<para>To emphasize this: unless
|
|
<literal>CPUAccounting=1</literal>,
|
|
<literal>MemoryAccounting=1</literal> and
|
|
<literal>BlockIOAccounting=1</literal> are enabled for the
|
|
services in question, no resource accounting will be available for
|
|
system services and the data shown by
|
|
<command>systemd-cgtop</command> will be incomplete.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Options</title>
|
|
|
|
<para>The following options are understood:</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><option>-p</option></term>
|
|
<term><option>--order=path</option></term>
|
|
|
|
<listitem><para>Order by control group
|
|
path name.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-t</option></term>
|
|
<term><option>--order=tasks</option></term>
|
|
|
|
<listitem><para>Order by number of tasks/processes in the control group.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-c</option></term>
|
|
<term><option>--order=cpu</option></term>
|
|
|
|
<listitem><para>Order by CPU load.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-m</option></term>
|
|
<term><option>--order=memory</option></term>
|
|
|
|
<listitem><para>Order by memory usage.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-i</option></term>
|
|
<term><option>--order=io</option></term>
|
|
|
|
<listitem><para>Order by disk I/O load.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-b</option></term>
|
|
<term><option>--batch</option></term>
|
|
|
|
<listitem><para>Run in "batch" mode: do not accept input and
|
|
run until the iteration limit set with
|
|
<option>--iterations=</option> is exhausted or until killed.
|
|
This mode could be useful for sending output from
|
|
<command>systemd-cgtop</command> to other programs or to a
|
|
file.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-r</option></term>
|
|
<term><option>--raw</option></term>
|
|
|
|
<listitem><para>Format byte counts (as in memory usage and I/O metrics)
|
|
with raw numeric values rather than human-readable
|
|
numbers.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--cpu=percentage</option></term>
|
|
<term><option>--cpu=time</option></term>
|
|
|
|
<listitem><para>Controls whether the CPU usage is shown as
|
|
percentage or time. By default, the CPU usage is shown as
|
|
percentage. This setting may also be toggled at runtime by
|
|
pressing the <keycap>%</keycap> key.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-P</option></term>
|
|
|
|
<listitem><para>Count only userspace processes instead of all
|
|
tasks. By default, all tasks are counted: each kernel thread
|
|
and each userspace thread individually. With this setting,
|
|
kernel threads are excluded from the counting and each
|
|
userspace process only counts as one, regardless how many
|
|
threads it consists of. This setting may also be toggled at
|
|
runtime by pressing the <keycap>P</keycap> key. This option
|
|
may not be combined with
|
|
<option>-k</option>.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-k</option></term>
|
|
|
|
<listitem><para>Count only userspace processes and kernel
|
|
threads instead of all tasks. By default, all tasks are
|
|
counted: each kernel thread and each userspace thread
|
|
individually. With this setting, kernel threads are included in
|
|
the counting and each userspace process only counts as on one,
|
|
regardless how many threads it consists of. This setting may
|
|
also be toggled at runtime by pressing the <keycap>k</keycap>
|
|
key. This option may not be combined with
|
|
<option>-P</option>.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--recursive=</option></term>
|
|
|
|
<listitem><para>Controls whether the number of processes shown
|
|
for a control group shall include all processes that are
|
|
contained in any of the child control groups as well. Takes a
|
|
boolean argument, which defaults to <literal>yes</literal>. If
|
|
enabled, the processes in child control groups are included, if
|
|
disabled, only the processes in the control group itself are
|
|
counted. This setting may also be toggled at runtime by
|
|
pressing the <keycap>r</keycap> key. Note that this setting
|
|
only applies to process counting, i.e. when the
|
|
<option>-P</option> or <option>-k</option> options are
|
|
used. It has not effect if all tasks are counted, in which
|
|
case the counting is always recursive.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-n</option></term>
|
|
<term><option>--iterations=</option></term>
|
|
|
|
<listitem><para>Perform only this many iterations. A value of
|
|
0 indicates that the program should run
|
|
indefinitely.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-1</option></term>
|
|
|
|
<listitem><para>A shortcut for <option>--iterations=1</option>.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-d</option></term>
|
|
<term><option>--delay=</option></term>
|
|
|
|
<listitem><para>Specify refresh delay in seconds (or if one of
|
|
<literal>ms</literal>, <literal>us</literal>,
|
|
<literal>min</literal> is specified as unit in this time
|
|
unit). This setting may also be increased and decreased at
|
|
runtime by pressing the <keycap>+</keycap> and
|
|
<keycap>-</keycap> keys.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--depth=</option></term>
|
|
|
|
<listitem><para>Maximum control group tree traversal depth.
|
|
Specifies how deep <command>systemd-cgtop</command> shall
|
|
traverse the control group hierarchies. If 0 is specified,
|
|
only the root group is monitored. For 1, only the first level
|
|
of control groups is monitored, and so on. Defaults to
|
|
3.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>-M <replaceable>MACHINE</replaceable></option></term>
|
|
<term><option>--machine=<replaceable>MACHINE</replaceable></option></term>
|
|
|
|
<listitem><para>Limit control groups shown to the part
|
|
corresponding to the container
|
|
<replaceable>MACHINE</replaceable>.
|
|
This option may not be used when a control group path is specified.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<xi:include href="standard-options.xml" xpointer="help" />
|
|
<xi:include href="standard-options.xml" xpointer="version" />
|
|
</variablelist>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Keys</title>
|
|
|
|
<para><command>systemd-cgtop</command> is an interactive tool and
|
|
may be controlled via user input using the following keys:</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><keycap>h</keycap></term>
|
|
|
|
<listitem><para>Shows a short help text.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><keycap function="space"/></term>
|
|
|
|
<listitem><para>Immediately refresh output.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><keycap>q</keycap></term>
|
|
|
|
<listitem><para>Terminate the program.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><keycap>p</keycap></term>
|
|
<term><keycap>t</keycap></term>
|
|
<term><keycap>c</keycap></term>
|
|
<term><keycap>m</keycap></term>
|
|
<term><keycap>i</keycap></term>
|
|
|
|
<listitem><para>Sort the control groups by path, number of
|
|
tasks, CPU load, memory usage, or I/O load, respectively. This
|
|
setting may also be controlled using the
|
|
<option>--order=</option> command line
|
|
switch.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><keycap>%</keycap></term>
|
|
|
|
<listitem><para>Toggle between showing CPU time as time or
|
|
percentage. This setting may also be controlled using the
|
|
<option>--cpu=</option> command line switch.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><keycap>+</keycap></term>
|
|
<term><keycap>-</keycap></term>
|
|
|
|
<listitem><para>Increase or decrease refresh delay,
|
|
respectively. This setting may also be controlled using the
|
|
<option>--delay=</option> command line
|
|
switch.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><keycap>P</keycap></term>
|
|
|
|
<listitem><para>Toggle between counting all tasks, or only
|
|
userspace processes. This setting may also be controlled using
|
|
the <option>-P</option> command line switch (see
|
|
above).</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><keycap>k</keycap></term>
|
|
|
|
<listitem><para>Toggle between counting all tasks, or only
|
|
userspace processes and kernel threads. This setting may also
|
|
be controlled using the <option>-k</option> command line
|
|
switch (see above).</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><keycap>r</keycap></term>
|
|
|
|
<listitem><para>Toggle between recursively including or
|
|
excluding processes in child control groups in control group
|
|
process counts. This setting may also be controlled using the
|
|
<option>--recursive=</option> command line switch. This key is
|
|
not available if all tasks are counted, it is only available
|
|
if processes are counted, as enabled with the
|
|
<keycap>P</keycap> or <keycap>k</keycap>
|
|
keys.</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>,
|
|
<citerefentry><refentrytitle>systemd-cgls</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry project='man-pages'><refentrytitle>top</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|