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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>systemd-cgtop</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><style>
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<a href="../libudev/index.html">gudev </a><span style="float:right">systemd 215</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="idm214195806768"></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="top.html"><span class="citerefentry"><span class="refentrytitle">top</span>(1)</span></a>.
If <span class="command"><strong>systemd-cgtop</strong></span> is not connected
to a tty, only one iteration is performed and no
columns headers are printed. 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>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="idm214199989184"></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="-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.</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="idm214200041872"></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="idm214200022192"></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="idm214200021008"></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="top.html"><span class="citerefentry"><span class="refentrytitle">top</span>(1)</span></a>
</p></div></div></body></html>
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