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45d7a8bb | 1 | <?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*--> |
caa94887 | 2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" |
12b42c76 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
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4 | |
5 | <!-- | |
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6 | SPDX-License-Identifier: LGPL-2.1+ |
7 | ||
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8 | This file is part of systemd. |
9 | ||
10 | Copyright 2012 Lennart Poettering | |
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11 | --> |
12 | ||
dfdebb1b | 13 | <refentry id="systemd-cgtop" |
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14 | xmlns:xi="http://www.w3.org/2001/XInclude"> |
15 | ||
16 | <refentryinfo> | |
17 | <title>systemd-cgtop</title> | |
18 | <productname>systemd</productname> | |
19 | ||
20 | <authorgroup> | |
21 | <author> | |
22 | <contrib>Developer</contrib> | |
23 | <firstname>Lennart</firstname> | |
24 | <surname>Poettering</surname> | |
25 | <email>lennart@poettering.net</email> | |
26 | </author> | |
27 | </authorgroup> | |
28 | </refentryinfo> | |
29 | ||
30 | <refmeta> | |
31 | <refentrytitle>systemd-cgtop</refentrytitle> | |
32 | <manvolnum>1</manvolnum> | |
33 | </refmeta> | |
34 | ||
35 | <refnamediv> | |
36 | <refname>systemd-cgtop</refname> | |
37 | <refpurpose>Show top control groups by their resource usage</refpurpose> | |
38 | </refnamediv> | |
39 | ||
40 | <refsynopsisdiv> | |
41 | <cmdsynopsis> | |
42 | <command>systemd-cgtop</command> | |
43 | <arg choice="opt" rep="repeat">OPTIONS</arg> | |
308253c5 | 44 | <arg choice="opt">GROUP</arg> |
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45 | </cmdsynopsis> |
46 | </refsynopsisdiv> | |
47 | ||
48 | <refsect1> | |
49 | <title>Description</title> | |
50 | ||
51 | <para><command>systemd-cgtop</command> shows the top control | |
52 | groups of the local Linux control group hierarchy, ordered by | |
53 | their CPU, memory, or disk I/O load. The display is refreshed in | |
54 | regular intervals (by default every 1s), similar in style to | |
308253c5 AP |
55 | <citerefentry project='man-pages'><refentrytitle>top</refentrytitle><manvolnum>1</manvolnum></citerefentry>. |
56 | If a control group path is specified, shows only the services of | |
57 | the specified control group.</para> | |
780fe62e | 58 | |
45d7a8bb LP |
59 | <para>If <command>systemd-cgtop</command> is not connected to a |
60 | tty, no column headers are printed and the default is to only run | |
61 | one iteration. The <varname>--iterations=</varname> argument, if | |
62 | given, is honored. This mode is suitable for scripting.</para> | |
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63 | |
64 | <para>Resource usage is only accounted for control groups in the | |
65 | relevant hierarchy, i.e. CPU usage is only accounted for control | |
66 | groups in the <literal>cpuacct</literal> hierarchy, memory usage | |
67 | only for those in <literal>memory</literal> and disk I/O usage for | |
68 | those in <literal>blkio</literal>. If resource monitoring for | |
69 | these resources is required, it is recommended to add the | |
70 | <varname>CPUAccounting=1</varname>, | |
71 | <varname>MemoryAccounting=1</varname> and | |
72 | <varname>BlockIOAccounting=1</varname> settings in the unit files | |
73 | in question. See | |
74 | <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
75 | for details.</para> | |
76 | ||
b0f5a510 UTL |
77 | <para>The CPU load value can be between 0 and 100 times the number of |
78 | processors the system has. For example, if the system has 8 processors, | |
79 | the CPU load value is going to be between 0% and 800%. The number of | |
80 | processors can be found in <literal>/proc/cpuinfo</literal>.</para> | |
81 | ||
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82 | <para>To emphasize this: unless |
83 | <literal>CPUAccounting=1</literal>, | |
84 | <literal>MemoryAccounting=1</literal> and | |
85 | <literal>BlockIOAccounting=1</literal> are enabled for the | |
86 | services in question, no resource accounting will be available for | |
87 | system services and the data shown by | |
88 | <command>systemd-cgtop</command> will be incomplete.</para> | |
89 | </refsect1> | |
90 | ||
91 | <refsect1> | |
92 | <title>Options</title> | |
93 | ||
94 | <para>The following options are understood:</para> | |
95 | ||
96 | <variablelist> | |
97 | <varlistentry> | |
98 | <term><option>-p</option></term> | |
45d7a8bb | 99 | <term><option>--order=path</option></term> |
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100 | |
101 | <listitem><para>Order by control group | |
102 | path name.</para></listitem> | |
103 | </varlistentry> | |
104 | ||
105 | <varlistentry> | |
106 | <term><option>-t</option></term> | |
45d7a8bb | 107 | <term><option>--order=tasks</option></term> |
798d3a52 | 108 | |
03a7b521 | 109 | <listitem><para>Order by number of tasks/processes in the control group.</para></listitem> |
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110 | </varlistentry> |
111 | ||
112 | <varlistentry> | |
113 | <term><option>-c</option></term> | |
45d7a8bb | 114 | <term><option>--order=cpu</option></term> |
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115 | |
116 | <listitem><para>Order by CPU load.</para></listitem> | |
117 | </varlistentry> | |
118 | ||
119 | <varlistentry> | |
120 | <term><option>-m</option></term> | |
45d7a8bb | 121 | <term><option>--order=memory</option></term> |
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122 | |
123 | <listitem><para>Order by memory usage.</para></listitem> | |
124 | </varlistentry> | |
125 | ||
126 | <varlistentry> | |
127 | <term><option>-i</option></term> | |
45d7a8bb | 128 | <term><option>--order=io</option></term> |
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129 | |
130 | <listitem><para>Order by disk I/O load.</para></listitem> | |
131 | </varlistentry> | |
132 | ||
133 | <varlistentry> | |
134 | <term><option>-b</option></term> | |
135 | <term><option>--batch</option></term> | |
136 | ||
137 | <listitem><para>Run in "batch" mode: do not accept input and | |
138 | run until the iteration limit set with | |
45d7a8bb | 139 | <option>--iterations=</option> is exhausted or until killed. |
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140 | This mode could be useful for sending output from |
141 | <command>systemd-cgtop</command> to other programs or to a | |
142 | file.</para></listitem> | |
143 | </varlistentry> | |
144 | ||
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145 | <varlistentry> |
146 | <term><option>-r</option></term> | |
147 | <term><option>--raw</option></term> | |
148 | ||
a5201ed6 LP |
149 | <listitem><para>Format byte counts (as in memory usage and I/O metrics) |
150 | with raw numeric values rather than human-readable | |
a2c9f631 CD |
151 | numbers.</para></listitem> |
152 | </varlistentry> | |
153 | ||
45d7a8bb LP |
154 | <varlistentry> |
155 | <term><option>--cpu=percentage</option></term> | |
156 | <term><option>--cpu=time</option></term> | |
157 | ||
158 | <listitem><para>Controls whether the CPU usage is shown as | |
b938cb90 | 159 | percentage or time. By default, the CPU usage is shown as |
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160 | percentage. This setting may also be toggled at runtime by |
161 | pressing the <keycap>%</keycap> key.</para></listitem> | |
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162 | </varlistentry> |
163 | ||
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164 | <varlistentry> |
165 | <term><option>-P</option></term> | |
166 | ||
167 | <listitem><para>Count only userspace processes instead of all | |
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168 | tasks. By default, all tasks are counted: each kernel thread |
169 | and each userspace thread individually. With this setting, | |
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170 | kernel threads are excluded from the counting and each |
171 | userspace process only counts as one, regardless how many | |
172 | threads it consists of. This setting may also be toggled at | |
173 | runtime by pressing the <keycap>P</keycap> key. This option | |
174 | may not be combined with | |
175 | <option>-k</option>.</para></listitem> | |
176 | </varlistentry> | |
177 | ||
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178 | <varlistentry> |
179 | <term><option>-k</option></term> | |
180 | ||
03a7b521 | 181 | <listitem><para>Count only userspace processes and kernel |
b938cb90 | 182 | threads instead of all tasks. By default, all tasks are |
03a7b521 | 183 | counted: each kernel thread and each userspace thread |
b938cb90 | 184 | individually. With this setting, kernel threads are included in |
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185 | the counting and each userspace process only counts as on one, |
186 | regardless how many threads it consists of. This setting may | |
187 | also be toggled at runtime by pressing the <keycap>k</keycap> | |
188 | key. This option may not be combined with | |
189 | <option>-P</option>.</para></listitem> | |
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190 | </varlistentry> |
191 | ||
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192 | <varlistentry> |
193 | <term><option>--recursive=</option></term> | |
194 | ||
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195 | <listitem><para>Controls whether the number of processes shown |
196 | for a control group shall include all processes that are | |
197 | contained in any of the child control groups as well. Takes a | |
a8eaaee7 | 198 | boolean argument, which defaults to <literal>yes</literal>. If |
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199 | enabled, the processes in child control groups are included, if |
200 | disabled, only the processes in the control group itself are | |
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201 | counted. This setting may also be toggled at runtime by |
202 | pressing the <keycap>r</keycap> key. Note that this setting | |
203 | only applies to process counting, i.e. when the | |
204 | <option>-P</option> or <option>-k</option> options are | |
205 | used. It has not effect if all tasks are counted, in which | |
206 | case the counting is always recursive.</para></listitem> | |
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207 | </varlistentry> |
208 | ||
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209 | <varlistentry> |
210 | <term><option>-n</option></term> | |
211 | <term><option>--iterations=</option></term> | |
212 | ||
6d3eefd2 LP |
213 | <listitem><para>Perform only this many iterations. A value of |
214 | 0 indicates that the program should run | |
215 | indefinitely.</para></listitem> | |
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216 | </varlistentry> |
217 | ||
4fc9ffab LP |
218 | <varlistentry> |
219 | <term><option>-1</option></term> | |
220 | ||
221 | <listitem><para>A shortcut for <option>--iterations=1</option>.</para></listitem> | |
222 | </varlistentry> | |
223 | ||
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224 | <varlistentry> |
225 | <term><option>-d</option></term> | |
226 | <term><option>--delay=</option></term> | |
227 | ||
228 | <listitem><para>Specify refresh delay in seconds (or if one of | |
6d3eefd2 | 229 | <literal>ms</literal>, <literal>us</literal>, |
798d3a52 | 230 | <literal>min</literal> is specified as unit in this time |
6d3eefd2 LP |
231 | unit). This setting may also be increased and decreased at |
232 | runtime by pressing the <keycap>+</keycap> and | |
233 | <keycap>-</keycap> keys.</para></listitem> | |
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234 | </varlistentry> |
235 | ||
236 | <varlistentry> | |
237 | <term><option>--depth=</option></term> | |
238 | ||
239 | <listitem><para>Maximum control group tree traversal depth. | |
240 | Specifies how deep <command>systemd-cgtop</command> shall | |
241 | traverse the control group hierarchies. If 0 is specified, | |
242 | only the root group is monitored. For 1, only the first level | |
243 | of control groups is monitored, and so on. Defaults to | |
244 | 3.</para></listitem> | |
245 | </varlistentry> | |
246 | ||
96a6426f EV |
247 | <varlistentry> |
248 | <term><option>-M <replaceable>MACHINE</replaceable></option></term> | |
249 | <term><option>--machine=<replaceable>MACHINE</replaceable></option></term> | |
250 | ||
251 | <listitem><para>Limit control groups shown to the part | |
252 | corresponding to the container | |
308253c5 AP |
253 | <replaceable>MACHINE</replaceable>. |
254 | This option may not be used when a control group path is specified.</para></listitem> | |
96a6426f EV |
255 | </varlistentry> |
256 | ||
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257 | <xi:include href="standard-options.xml" xpointer="help" /> |
258 | <xi:include href="standard-options.xml" xpointer="version" /> | |
259 | </variablelist> | |
260 | ||
261 | </refsect1> | |
262 | ||
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263 | <refsect1> |
264 | <title>Keys</title> | |
265 | ||
266 | <para><command>systemd-cgtop</command> is an interactive tool and | |
267 | may be controlled via user input using the following keys:</para> | |
268 | ||
269 | <variablelist> | |
270 | <varlistentry> | |
6d3eefd2 | 271 | <term><keycap>h</keycap></term> |
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272 | |
273 | <listitem><para>Shows a short help text.</para></listitem> | |
274 | </varlistentry> | |
275 | ||
276 | <varlistentry> | |
6d3eefd2 | 277 | <term><keycap function="space"/></term> |
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278 | |
279 | <listitem><para>Immediately refresh output.</para></listitem> | |
280 | </varlistentry> | |
281 | ||
282 | <varlistentry> | |
6d3eefd2 | 283 | <term><keycap>q</keycap></term> |
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284 | |
285 | <listitem><para>Terminate the program.</para></listitem> | |
286 | </varlistentry> | |
287 | ||
798d3a52 | 288 | <varlistentry> |
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289 | <term><keycap>p</keycap></term> |
290 | <term><keycap>t</keycap></term> | |
291 | <term><keycap>c</keycap></term> | |
292 | <term><keycap>m</keycap></term> | |
293 | <term><keycap>i</keycap></term> | |
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294 | |
295 | <listitem><para>Sort the control groups by path, number of | |
b938cb90 | 296 | tasks, CPU load, memory usage, or I/O load, respectively. This |
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297 | setting may also be controlled using the |
298 | <option>--order=</option> command line | |
299 | switch.</para></listitem> | |
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300 | </varlistentry> |
301 | ||
302 | <varlistentry> | |
6d3eefd2 | 303 | <term><keycap>%</keycap></term> |
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304 | |
305 | <listitem><para>Toggle between showing CPU time as time or | |
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306 | percentage. This setting may also be controlled using the |
307 | <option>--cpu=</option> command line switch.</para></listitem> | |
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308 | </varlistentry> |
309 | ||
310 | <varlistentry> | |
6d3eefd2 LP |
311 | <term><keycap>+</keycap></term> |
312 | <term><keycap>-</keycap></term> | |
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313 | |
314 | <listitem><para>Increase or decrease refresh delay, | |
6d3eefd2 LP |
315 | respectively. This setting may also be controlled using the |
316 | <option>--delay=</option> command line | |
317 | switch.</para></listitem> | |
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318 | </varlistentry> |
319 | ||
03a7b521 LP |
320 | <varlistentry> |
321 | <term><keycap>P</keycap></term> | |
322 | ||
323 | <listitem><para>Toggle between counting all tasks, or only | |
324 | userspace processes. This setting may also be controlled using | |
325 | the <option>-P</option> command line switch (see | |
326 | above).</para></listitem> | |
327 | </varlistentry> | |
328 | ||
7fcfb7ee | 329 | <varlistentry> |
6d3eefd2 | 330 | <term><keycap>k</keycap></term> |
7fcfb7ee | 331 | |
03a7b521 LP |
332 | <listitem><para>Toggle between counting all tasks, or only |
333 | userspace processes and kernel threads. This setting may also | |
334 | be controlled using the <option>-k</option> command line | |
335 | switch (see above).</para></listitem> | |
7fcfb7ee LP |
336 | </varlistentry> |
337 | ||
338 | <varlistentry> | |
6d3eefd2 | 339 | <term><keycap>r</keycap></term> |
7fcfb7ee LP |
340 | |
341 | <listitem><para>Toggle between recursively including or | |
03a7b521 LP |
342 | excluding processes in child control groups in control group |
343 | process counts. This setting may also be controlled using the | |
344 | <option>--recursive=</option> command line switch. This key is | |
a8eaaee7 | 345 | not available if all tasks are counted, it is only available |
03a7b521 LP |
346 | if processes are counted, as enabled with the |
347 | <keycap>P</keycap> or <keycap>k</keycap> | |
348 | keys.</para></listitem> | |
7fcfb7ee LP |
349 | </varlistentry> |
350 | ||
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351 | </variablelist> |
352 | </refsect1> | |
353 | ||
354 | <refsect1> | |
355 | <title>Exit status</title> | |
356 | ||
357 | <para>On success, 0 is returned, a non-zero failure code | |
358 | otherwise.</para> | |
359 | </refsect1> | |
360 | ||
361 | <refsect1> | |
362 | <title>See Also</title> | |
363 | <para> | |
364 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
365 | <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
366 | <citerefentry><refentrytitle>systemd-cgls</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
367 | <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
368 | <citerefentry project='man-pages'><refentrytitle>top</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
369 | </para> | |
370 | </refsect1> | |
caa94887 LP |
371 | |
372 | </refentry> |