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Diffstat (limited to 'man/systemd-cgtop.xml')
| -rw-r--r-- | man/systemd-cgtop.xml | 473 |
1 files changed, 228 insertions, 245 deletions
diff --git a/man/systemd-cgtop.xml b/man/systemd-cgtop.xml index 8ee552a012..f1ff218c39 100644 --- a/man/systemd-cgtop.xml +++ b/man/systemd-cgtop.xml @@ -1,6 +1,6 @@ <?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"> + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> <!-- This file is part of systemd. @@ -22,249 +22,232 @@ --> <refentry id="systemd-cgtop" - xmlns:xi="http://www.w3.org/2001/XInclude"> - - <refentryinfo> - <title>systemd-cgtop</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-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> - </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 <command>systemd-cgtop</command> is not connected - to a tty, only one iteration is performed and no - columns headers are printed. 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>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> - - <listitem><para>Order by control group - path name.</para></listitem> - </varlistentry> - - <varlistentry> - <term><option>-t</option></term> - - <listitem><para>Order by number of - tasks in control - group (i.e. threads and processes).</para></listitem> - </varlistentry> - - <varlistentry> - <term><option>-c</option></term> - - <listitem><para>Order by CPU load.</para></listitem> - </varlistentry> - - <varlistentry> - <term><option>-m</option></term> - - <listitem><para>Order by memory usage.</para></listitem> - </varlistentry> - - <varlistentry> - <term><option>-i</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>-n</option></term> - <term><option>--iterations=</option></term> - - <listitem><para>Perform only this many - iterations.</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).</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> - - <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>h</term> - - <listitem><para>Shows a short help text.</para></listitem> - </varlistentry> - - <varlistentry> - <term>SPACE</term> - - <listitem><para>Immediately refresh output.</para></listitem> - </varlistentry> - - <varlistentry> - <term>q</term> - - <listitem><para>Terminate the program.</para></listitem> - </varlistentry> - - - <varlistentry> - <term>p</term> - <term>t</term> - <term>c</term> - <term>m</term> - <term>i</term> - - <listitem><para>Sort the control groups - by path, number of tasks, CPU load, - memory usage, or IO - load, respectively.</para></listitem> - </varlistentry> - - <varlistentry> - <term>%</term> - - <listitem><para>Toggle between showing CPU time as - time or percentage.</para></listitem> - </varlistentry> - - <varlistentry> - <term>+</term> - <term>-</term> - - <listitem><para>Increase - or decrease refresh - delay, respectively.</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> + xmlns:xi="http://www.w3.org/2001/XInclude"> + + <refentryinfo> + <title>systemd-cgtop</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-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> + </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 <command>systemd-cgtop</command> is not connected to a tty, + only one iteration is performed and no columns headers are + printed. 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>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> + + <listitem><para>Order by control group + path name.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>-t</option></term> + + <listitem><para>Order by number of tasks in control group + (i.e. threads and processes).</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>-c</option></term> + + <listitem><para>Order by CPU load.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>-m</option></term> + + <listitem><para>Order by memory usage.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>-i</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>-n</option></term> + <term><option>--iterations=</option></term> + + <listitem><para>Perform only this many iterations. + </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).</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> + + <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>h</term> + + <listitem><para>Shows a short help text.</para></listitem> + </varlistentry> + + <varlistentry> + <term>SPACE</term> + + <listitem><para>Immediately refresh output.</para></listitem> + </varlistentry> + + <varlistentry> + <term>q</term> + + <listitem><para>Terminate the program.</para></listitem> + </varlistentry> + + + <varlistentry> + <term>p</term> + <term>t</term> + <term>c</term> + <term>m</term> + <term>i</term> + + <listitem><para>Sort the control groups by path, number of + tasks, CPU load, memory usage, or IO load, respectively. + </para></listitem> + </varlistentry> + + <varlistentry> + <term>%</term> + + <listitem><para>Toggle between showing CPU time as time or + percentage.</para></listitem> + </varlistentry> + + <varlistentry> + <term>+</term> + <term>-</term> + + <listitem><para>Increase or decrease refresh delay, + respectively.</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> |