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<span style="float:right">systemd 221</span><hr><div class="refentry"><a name="systemd-cgtop"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>systemd-cgtop — Show top control groups by their resource usage</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">systemd-cgtop</code> [OPTIONS...]</p></div></div><div class="refsect1"><a name="idm47663115852304"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p><span class="command"><strong>systemd-cgtop</strong></span> 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
<a href="http://man7.org/linux/man-pages/man1/top.1.html"><span class="citerefentry"><span class="refentrytitle">top</span>(1)</span></a>.</p><p>If <span class="command"><strong>systemd-cgtop</strong></span> is not connected to a tty, no
column headers are printed and the default is to only run one iteration.
The <code class="varname">--iterations</code> argument, if given, is still honored.
This mode is suitable for scripting.</p><p>Resource usage is only accounted for control groups in the
relevant hierarchy, i.e. CPU usage is only accounted for control
groups in the "<code class="literal">cpuacct</code>" hierarchy, memory usage
only for those in "<code class="literal">memory</code>" and disk I/O usage for
those in "<code class="literal">blkio</code>". If resource monitoring for
these resources is required, it is recommended to add the
<code class="varname">CPUAccounting=1</code>,
<code class="varname">MemoryAccounting=1</code> and
<code class="varname">BlockIOAccounting=1</code> settings in the unit files
in question. See
<a href="systemd.resource-control.html"><span class="citerefentry"><span class="refentrytitle">systemd.resource-control</span>(5)</span></a>
for details.</p><p>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 "<code class="literal">/proc/cpuinfo</code>".</p><p>To emphasize this: unless
"<code class="literal">CPUAccounting=1</code>",
"<code class="literal">MemoryAccounting=1</code>" and
"<code class="literal">BlockIOAccounting=1</code>" are enabled for the
services in question, no resource accounting will be available for
system services and the data shown by
<span class="command"><strong>systemd-cgtop</strong></span> will be incomplete.</p></div><div class="refsect1"><a name="idm47663110885584"></a><h2 id="Options">Options<a class="headerlink" title="Permalink to this headline" href="#Options">¶</a></h2><p>The following options are understood:</p><div class="variablelist"><dl class="variablelist"><dt id="-p"><span class="term"><code class="option">-p</code></span><a class="headerlink" title="Permalink to this term" href="#-p">¶</a></dt><dd><p>Order by control group
path name.</p></dd><dt id="-t"><span class="term"><code class="option">-t</code></span><a class="headerlink" title="Permalink to this term" href="#-t">¶</a></dt><dd><p>Order by number of tasks in control group
(i.e. threads and processes).</p></dd><dt id="-c"><span class="term"><code class="option">-c</code></span><a class="headerlink" title="Permalink to this term" href="#-c">¶</a></dt><dd><p>Order by CPU load.</p></dd><dt id="-m"><span class="term"><code class="option">-m</code></span><a class="headerlink" title="Permalink to this term" href="#-m">¶</a></dt><dd><p>Order by memory usage.</p></dd><dt id="-i"><span class="term"><code class="option">-i</code></span><a class="headerlink" title="Permalink to this term" href="#-i">¶</a></dt><dd><p>Order by disk I/O load.</p></dd><dt id="-b"><span class="term"><code class="option">-b</code>, </span><span class="term"><code class="option">--batch</code></span><a class="headerlink" title="Permalink to this term" href="#-b">¶</a></dt><dd><p>Run in "batch" mode: do not accept input and
run until the iteration limit set with
<code class="option">--iterations</code> is exhausted or until killed.
This mode could be useful for sending output from
<span class="command"><strong>systemd-cgtop</strong></span> to other programs or to a
file.</p></dd><dt id="-r"><span class="term"><code class="option">-r</code>, </span><span class="term"><code class="option">--raw</code></span><a class="headerlink" title="Permalink to this term" href="#-r">¶</a></dt><dd><p>Format byte counts (as in memory usage and IO metrics)
with raw numeric values rather than human-readable
numbers.</p></dd><dt id="-n"><span class="term"><code class="option">-n</code>, </span><span class="term"><code class="option">--iterations=</code></span><a class="headerlink" title="Permalink to this term" href="#-n">¶</a></dt><dd><p>Perform only this many iterations. A value of 0
indicates that the program should run indefinitely.</p></dd><dt id="-d"><span class="term"><code class="option">-d</code>, </span><span class="term"><code class="option">--delay=</code></span><a class="headerlink" title="Permalink to this term" href="#-d">¶</a></dt><dd><p>Specify refresh delay in seconds (or if one of
"<code class="literal">ms</code>",
"<code class="literal">us</code>",
"<code class="literal">min</code>" is specified as unit in this time
unit).</p></dd><dt id="--depth="><span class="term"><code class="option">--depth=</code></span><a class="headerlink" title="Permalink to this term" href="#--depth=">¶</a></dt><dd><p>Maximum control group tree traversal depth.
Specifies how deep <span class="command"><strong>systemd-cgtop</strong></span> 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.</p></dd><dt id="-h"><span class="term"><code class="option">-h</code>, </span><span class="term"><code class="option">--help</code></span><a class="headerlink" title="Permalink to this term" href="#-h">¶</a></dt><dd><p><a name="help-text"></a>Print a short help text and exit.
</p></dd><dt id="--version"><span class="term"><code class="option">--version</code></span><a class="headerlink" title="Permalink to this term" href="#--version">¶</a></dt><dd><p><a name="version-text"></a>Print a short version string and exit.</p></dd></dl></div></div><div class="refsect1"><a name="idm47663110862208"></a><h2 id="Keys">Keys<a class="headerlink" title="Permalink to this headline" href="#Keys">¶</a></h2><p><span class="command"><strong>systemd-cgtop</strong></span> is an interactive tool and
may be controlled via user input using the following keys:</p><div class="variablelist"><dl class="variablelist"><dt id="h"><span class="term">h</span><a class="headerlink" title="Permalink to this term" href="#h">¶</a></dt><dd><p>Shows a short help text.</p></dd><dt id="SPACE"><span class="term">SPACE</span><a class="headerlink" title="Permalink to this term" href="#SPACE">¶</a></dt><dd><p>Immediately refresh output.</p></dd><dt id="q"><span class="term">q</span><a class="headerlink" title="Permalink to this term" href="#q">¶</a></dt><dd><p>Terminate the program.</p></dd><dt id="p"><span class="term">p, </span><span class="term">t, </span><span class="term">c, </span><span class="term">m, </span><span class="term">i</span><a class="headerlink" title="Permalink to this term" href="#p">¶</a></dt><dd><p>Sort the control groups by path, number of
tasks, CPU load, memory usage, or IO load, respectively.
</p></dd><dt id="%"><span class="term">%</span><a class="headerlink" title="Permalink to this term" href="#%">¶</a></dt><dd><p>Toggle between showing CPU time as time or
percentage.</p></dd><dt id="+"><span class="term">+, </span><span class="term">-</span><a class="headerlink" title="Permalink to this term" href="#+">¶</a></dt><dd><p>Increase or decrease refresh delay,
respectively.</p></dd></dl></div></div><div class="refsect1"><a name="idm47663110850336"></a><h2 id="Exit status">Exit status<a class="headerlink" title="Permalink to this headline" href="#Exit%20status">¶</a></h2><p>On success, 0 is returned, a non-zero failure code
otherwise.</p></div><div class="refsect1"><a name="idm47663110849184"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
<a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>,
<a href="systemctl.html"><span class="citerefentry"><span class="refentrytitle">systemctl</span>(1)</span></a>,
<a href="systemd-cgls.html"><span class="citerefentry"><span class="refentrytitle">systemd-cgls</span>(1)</span></a>,
<a href="systemd.resource-control.html"><span class="citerefentry"><span class="refentrytitle">systemd.resource-control</span>(5)</span></a>,
<a href="http://man7.org/linux/man-pages/man1/top.1.html"><span class="citerefentry"><span class="refentrytitle">top</span>(1)</span></a>
</p></div></div></body></html>
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