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</style><a href="index.html">Index </a>·
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<a href="systemd.directives.html">Directives </a>·
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<a href="../python-systemd/index.html">Python </a>·
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<a href="../libudev/index.html">libudev </a>·
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<a href="../libudev/index.html">gudev </a><span style="float:right">systemd 208</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="idm274686307536"></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
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control groups of the local Linux control group
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hierarchy, ordered by their CPU, memory, or disk I/O load. The
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display is refreshed in regular intervals (by default
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every 1s), similar in style to
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<a href="top.html"><span class="citerefentry"><span class="refentrytitle">top</span>(1)</span></a>.
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If <span class="command"><strong>systemd-cgtop</strong></span> is not connected
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to a tty, only one iteration is performed and no
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columns headers are printed. This mode is suitable for
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scripting.</p><p>Resource usage is only accounted for control
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groups in the relevant hierarchy, i.e. CPU usage is
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only accounted for control groups in the
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"<code class="literal">cpuacct</code>" hierarchy, memory usage
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only for those in "<code class="literal">memory</code>" and disk
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I/O usage for those in "<code class="literal">blkio</code>". If
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resource monitoring for these resources is required,
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it is recommended to add the
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<code class="varname">CPUAccounting=1</code>,
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<code class="varname">MemoryAccounting=1</code> and
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<code class="varname">BlockIOAccounting=1</code> settings in the
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unit files in question (See
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<a href="systemd.resource-control.html"><span class="citerefentry"><span class="refentrytitle">systemd.resource-control</span>(5)</span></a>
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for details).</p><p>To emphasize this: unless
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"<code class="literal">CPUAccounting=1</code>",
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"<code class="literal">MemoryAccounting=1</code>" and
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"<code class="literal">BlockIOAccounting=1</code>" are enabled for
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the services in question no resource accounting will
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be available for system services and the data shown by
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<span class="command"><strong>systemd-cgtop</strong></span> will be
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incomplete.</p></div><div class="refsect1"><a name="idm274686295344"></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="-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>Prints a short help
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text and exits.</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>Prints a version string and
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exits.</p></dd><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
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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
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tasks in control
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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:
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do not accept input and run until the
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iteration limit set with
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<code class="option">--iterations</code> is
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exhausted or until killed. This mode
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could be useful for sending output
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from <span class="command"><strong>systemd-cgtop</strong></span>
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to other programs or to a
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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
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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
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in seconds (or if one of
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"<code class="literal">ms</code>",
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"<code class="literal">us</code>",
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"<code class="literal">min</code>" is specified as
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unit in this time
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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
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tree traversal depth. Specifies how
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deep <span class="command"><strong>systemd-cgtop</strong></span>
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shall traverse the control group
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hierarchies. If 0 is specified, only
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the root group is monitored. For 1,
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only the first level of control groups
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is monitored, and so on. Defaults to
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3.</p></dd></dl></div></div><div class="refsect1"><a name="idm274690160080"></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
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interactive tool and may be controlled via user input
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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
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by path, number of tasks, CPU load,
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memory usage, or IO
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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
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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
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or decrease refresh
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delay, respectively.</p></dd></dl></div></div><div class="refsect1"><a name="idm274690147536"></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
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code otherwise.</p></div><div class="refsect1"><a name="idm274690146352"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
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<a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>,
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<a href="systemctl.html"><span class="citerefentry"><span class="refentrytitle">systemctl</span>(1)</span></a>,
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<a href="systemd-cgls.html"><span class="citerefentry"><span class="refentrytitle">systemd-cgls</span>(1)</span></a>,
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<a href="systemd.resource-control.html"><span class="citerefentry"><span class="refentrytitle">systemd.resource-control</span>(5)</span></a>,
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<a href="top.html"><span class="citerefentry"><span class="refentrytitle">top</span>(1)</span></a>
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</p></div></div></body></html>
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