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514094f9 | 1 | <?xml version='1.0'?> |
3a54a157 | 2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" |
12b42c76 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
db9ecf05 | 4 | <!-- SPDX-License-Identifier: LGPL-2.1-or-later --> |
caa94887 | 5 | |
dfdebb1b | 6 | <refentry id="systemd-cgtop" |
798d3a52 ZJS |
7 | xmlns:xi="http://www.w3.org/2001/XInclude"> |
8 | ||
9 | <refentryinfo> | |
10 | <title>systemd-cgtop</title> | |
11 | <productname>systemd</productname> | |
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12 | </refentryinfo> |
13 | ||
14 | <refmeta> | |
15 | <refentrytitle>systemd-cgtop</refentrytitle> | |
16 | <manvolnum>1</manvolnum> | |
17 | </refmeta> | |
18 | ||
19 | <refnamediv> | |
20 | <refname>systemd-cgtop</refname> | |
21 | <refpurpose>Show top control groups by their resource usage</refpurpose> | |
22 | </refnamediv> | |
23 | ||
24 | <refsynopsisdiv> | |
25 | <cmdsynopsis> | |
26 | <command>systemd-cgtop</command> | |
27 | <arg choice="opt" rep="repeat">OPTIONS</arg> | |
308253c5 | 28 | <arg choice="opt">GROUP</arg> |
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29 | </cmdsynopsis> |
30 | </refsynopsisdiv> | |
31 | ||
32 | <refsect1> | |
33 | <title>Description</title> | |
34 | ||
35 | <para><command>systemd-cgtop</command> shows the top control | |
36 | groups of the local Linux control group hierarchy, ordered by | |
37 | their CPU, memory, or disk I/O load. The display is refreshed in | |
38 | regular intervals (by default every 1s), similar in style to | |
308253c5 AP |
39 | <citerefentry project='man-pages'><refentrytitle>top</refentrytitle><manvolnum>1</manvolnum></citerefentry>. |
40 | If a control group path is specified, shows only the services of | |
41 | the specified control group.</para> | |
780fe62e | 42 | |
45d7a8bb LP |
43 | <para>If <command>systemd-cgtop</command> is not connected to a |
44 | tty, no column headers are printed and the default is to only run | |
f8b68539 | 45 | one iteration. The <option>--iterations=</option> argument, if |
45d7a8bb | 46 | given, is honored. This mode is suitable for scripting.</para> |
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47 | |
48 | <para>Resource usage is only accounted for control groups in the | |
49 | relevant hierarchy, i.e. CPU usage is only accounted for control | |
50 | groups in the <literal>cpuacct</literal> hierarchy, memory usage | |
51 | only for those in <literal>memory</literal> and disk I/O usage for | |
52 | those in <literal>blkio</literal>. If resource monitoring for | |
53 | these resources is required, it is recommended to add the | |
54 | <varname>CPUAccounting=1</varname>, | |
55 | <varname>MemoryAccounting=1</varname> and | |
56 | <varname>BlockIOAccounting=1</varname> settings in the unit files | |
57 | in question. See | |
58 | <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
59 | for details.</para> | |
60 | ||
b0f5a510 UTL |
61 | <para>The CPU load value can be between 0 and 100 times the number of |
62 | processors the system has. For example, if the system has 8 processors, | |
63 | the CPU load value is going to be between 0% and 800%. The number of | |
64 | processors can be found in <literal>/proc/cpuinfo</literal>.</para> | |
65 | ||
798d3a52 ZJS |
66 | <para>To emphasize this: unless |
67 | <literal>CPUAccounting=1</literal>, | |
68 | <literal>MemoryAccounting=1</literal> and | |
69 | <literal>BlockIOAccounting=1</literal> are enabled for the | |
70 | services in question, no resource accounting will be available for | |
71 | system services and the data shown by | |
72 | <command>systemd-cgtop</command> will be incomplete.</para> | |
73 | </refsect1> | |
74 | ||
75 | <refsect1> | |
76 | <title>Options</title> | |
77 | ||
78 | <para>The following options are understood:</para> | |
79 | ||
80 | <variablelist> | |
81 | <varlistentry> | |
82 | <term><option>-p</option></term> | |
45d7a8bb | 83 | <term><option>--order=path</option></term> |
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84 | |
85 | <listitem><para>Order by control group | |
86 | path name.</para></listitem> | |
87 | </varlistentry> | |
88 | ||
89 | <varlistentry> | |
90 | <term><option>-t</option></term> | |
45d7a8bb | 91 | <term><option>--order=tasks</option></term> |
798d3a52 | 92 | |
03a7b521 | 93 | <listitem><para>Order by number of tasks/processes in the control group.</para></listitem> |
798d3a52 ZJS |
94 | </varlistentry> |
95 | ||
96 | <varlistentry> | |
97 | <term><option>-c</option></term> | |
45d7a8bb | 98 | <term><option>--order=cpu</option></term> |
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99 | |
100 | <listitem><para>Order by CPU load.</para></listitem> | |
101 | </varlistentry> | |
102 | ||
103 | <varlistentry> | |
104 | <term><option>-m</option></term> | |
45d7a8bb | 105 | <term><option>--order=memory</option></term> |
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106 | |
107 | <listitem><para>Order by memory usage.</para></listitem> | |
108 | </varlistentry> | |
109 | ||
110 | <varlistentry> | |
111 | <term><option>-i</option></term> | |
45d7a8bb | 112 | <term><option>--order=io</option></term> |
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113 | |
114 | <listitem><para>Order by disk I/O load.</para></listitem> | |
115 | </varlistentry> | |
116 | ||
117 | <varlistentry> | |
118 | <term><option>-b</option></term> | |
119 | <term><option>--batch</option></term> | |
120 | ||
121 | <listitem><para>Run in "batch" mode: do not accept input and | |
122 | run until the iteration limit set with | |
45d7a8bb | 123 | <option>--iterations=</option> is exhausted or until killed. |
798d3a52 ZJS |
124 | This mode could be useful for sending output from |
125 | <command>systemd-cgtop</command> to other programs or to a | |
126 | file.</para></listitem> | |
127 | </varlistentry> | |
128 | ||
a2c9f631 CD |
129 | <varlistentry> |
130 | <term><option>-r</option></term> | |
131 | <term><option>--raw</option></term> | |
132 | ||
42949516 | 133 | <listitem><para>Format byte counts (as in memory usage and I/O metrics) and CPU time |
a5201ed6 | 134 | with raw numeric values rather than human-readable |
a2c9f631 CD |
135 | numbers.</para></listitem> |
136 | </varlistentry> | |
137 | ||
45d7a8bb LP |
138 | <varlistentry> |
139 | <term><option>--cpu=percentage</option></term> | |
140 | <term><option>--cpu=time</option></term> | |
141 | ||
142 | <listitem><para>Controls whether the CPU usage is shown as | |
b938cb90 | 143 | percentage or time. By default, the CPU usage is shown as |
6d3eefd2 LP |
144 | percentage. This setting may also be toggled at runtime by |
145 | pressing the <keycap>%</keycap> key.</para></listitem> | |
45d7a8bb LP |
146 | </varlistentry> |
147 | ||
03a7b521 LP |
148 | <varlistentry> |
149 | <term><option>-P</option></term> | |
150 | ||
151 | <listitem><para>Count only userspace processes instead of all | |
b938cb90 JE |
152 | tasks. By default, all tasks are counted: each kernel thread |
153 | and each userspace thread individually. With this setting, | |
03a7b521 LP |
154 | kernel threads are excluded from the counting and each |
155 | userspace process only counts as one, regardless how many | |
156 | threads it consists of. This setting may also be toggled at | |
157 | runtime by pressing the <keycap>P</keycap> key. This option | |
158 | may not be combined with | |
159 | <option>-k</option>.</para></listitem> | |
160 | </varlistentry> | |
161 | ||
41ba8b6e LP |
162 | <varlistentry> |
163 | <term><option>-k</option></term> | |
164 | ||
03a7b521 | 165 | <listitem><para>Count only userspace processes and kernel |
b938cb90 | 166 | threads instead of all tasks. By default, all tasks are |
03a7b521 | 167 | counted: each kernel thread and each userspace thread |
b938cb90 | 168 | individually. With this setting, kernel threads are included in |
03a7b521 LP |
169 | the counting and each userspace process only counts as on one, |
170 | regardless how many threads it consists of. This setting may | |
171 | also be toggled at runtime by pressing the <keycap>k</keycap> | |
172 | key. This option may not be combined with | |
173 | <option>-P</option>.</para></listitem> | |
41ba8b6e LP |
174 | </varlistentry> |
175 | ||
3cb5beea LP |
176 | <varlistentry> |
177 | <term><option>--recursive=</option></term> | |
178 | ||
03a7b521 LP |
179 | <listitem><para>Controls whether the number of processes shown |
180 | for a control group shall include all processes that are | |
181 | contained in any of the child control groups as well. Takes a | |
a8eaaee7 | 182 | boolean argument, which defaults to <literal>yes</literal>. If |
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183 | enabled, the processes in child control groups are included, if |
184 | disabled, only the processes in the control group itself are | |
03a7b521 LP |
185 | counted. This setting may also be toggled at runtime by |
186 | pressing the <keycap>r</keycap> key. Note that this setting | |
187 | only applies to process counting, i.e. when the | |
188 | <option>-P</option> or <option>-k</option> options are | |
189 | used. It has not effect if all tasks are counted, in which | |
190 | case the counting is always recursive.</para></listitem> | |
3cb5beea LP |
191 | </varlistentry> |
192 | ||
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193 | <varlistentry> |
194 | <term><option>-n</option></term> | |
195 | <term><option>--iterations=</option></term> | |
196 | ||
6d3eefd2 LP |
197 | <listitem><para>Perform only this many iterations. A value of |
198 | 0 indicates that the program should run | |
199 | indefinitely.</para></listitem> | |
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200 | </varlistentry> |
201 | ||
4fc9ffab LP |
202 | <varlistentry> |
203 | <term><option>-1</option></term> | |
204 | ||
205 | <listitem><para>A shortcut for <option>--iterations=1</option>.</para></listitem> | |
206 | </varlistentry> | |
207 | ||
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208 | <varlistentry> |
209 | <term><option>-d</option></term> | |
210 | <term><option>--delay=</option></term> | |
211 | ||
212 | <listitem><para>Specify refresh delay in seconds (or if one of | |
6d3eefd2 | 213 | <literal>ms</literal>, <literal>us</literal>, |
798d3a52 | 214 | <literal>min</literal> is specified as unit in this time |
6d3eefd2 LP |
215 | unit). This setting may also be increased and decreased at |
216 | runtime by pressing the <keycap>+</keycap> and | |
217 | <keycap>-</keycap> keys.</para></listitem> | |
798d3a52 ZJS |
218 | </varlistentry> |
219 | ||
220 | <varlistentry> | |
221 | <term><option>--depth=</option></term> | |
222 | ||
223 | <listitem><para>Maximum control group tree traversal depth. | |
224 | Specifies how deep <command>systemd-cgtop</command> shall | |
225 | traverse the control group hierarchies. If 0 is specified, | |
226 | only the root group is monitored. For 1, only the first level | |
227 | of control groups is monitored, and so on. Defaults to | |
228 | 3.</para></listitem> | |
229 | </varlistentry> | |
230 | ||
96a6426f EV |
231 | <varlistentry> |
232 | <term><option>-M <replaceable>MACHINE</replaceable></option></term> | |
233 | <term><option>--machine=<replaceable>MACHINE</replaceable></option></term> | |
234 | ||
235 | <listitem><para>Limit control groups shown to the part | |
236 | corresponding to the container | |
308253c5 AP |
237 | <replaceable>MACHINE</replaceable>. |
238 | This option may not be used when a control group path is specified.</para></listitem> | |
96a6426f EV |
239 | </varlistentry> |
240 | ||
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241 | <xi:include href="standard-options.xml" xpointer="help" /> |
242 | <xi:include href="standard-options.xml" xpointer="version" /> | |
243 | </variablelist> | |
244 | ||
245 | </refsect1> | |
246 | ||
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247 | <refsect1> |
248 | <title>Keys</title> | |
249 | ||
250 | <para><command>systemd-cgtop</command> is an interactive tool and | |
251 | may be controlled via user input using the following keys:</para> | |
252 | ||
253 | <variablelist> | |
254 | <varlistentry> | |
6d3eefd2 | 255 | <term><keycap>h</keycap></term> |
798d3a52 ZJS |
256 | |
257 | <listitem><para>Shows a short help text.</para></listitem> | |
258 | </varlistentry> | |
259 | ||
260 | <varlistentry> | |
6d3eefd2 | 261 | <term><keycap function="space"/></term> |
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262 | |
263 | <listitem><para>Immediately refresh output.</para></listitem> | |
264 | </varlistentry> | |
265 | ||
266 | <varlistentry> | |
6d3eefd2 | 267 | <term><keycap>q</keycap></term> |
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268 | |
269 | <listitem><para>Terminate the program.</para></listitem> | |
270 | </varlistentry> | |
271 | ||
798d3a52 | 272 | <varlistentry> |
6d3eefd2 LP |
273 | <term><keycap>p</keycap></term> |
274 | <term><keycap>t</keycap></term> | |
275 | <term><keycap>c</keycap></term> | |
276 | <term><keycap>m</keycap></term> | |
277 | <term><keycap>i</keycap></term> | |
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278 | |
279 | <listitem><para>Sort the control groups by path, number of | |
b938cb90 | 280 | tasks, CPU load, memory usage, or I/O load, respectively. This |
6d3eefd2 LP |
281 | setting may also be controlled using the |
282 | <option>--order=</option> command line | |
283 | switch.</para></listitem> | |
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284 | </varlistentry> |
285 | ||
286 | <varlistentry> | |
6d3eefd2 | 287 | <term><keycap>%</keycap></term> |
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288 | |
289 | <listitem><para>Toggle between showing CPU time as time or | |
6d3eefd2 LP |
290 | percentage. This setting may also be controlled using the |
291 | <option>--cpu=</option> command line switch.</para></listitem> | |
798d3a52 ZJS |
292 | </varlistentry> |
293 | ||
294 | <varlistentry> | |
6d3eefd2 LP |
295 | <term><keycap>+</keycap></term> |
296 | <term><keycap>-</keycap></term> | |
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297 | |
298 | <listitem><para>Increase or decrease refresh delay, | |
6d3eefd2 LP |
299 | respectively. This setting may also be controlled using the |
300 | <option>--delay=</option> command line | |
301 | switch.</para></listitem> | |
798d3a52 ZJS |
302 | </varlistentry> |
303 | ||
03a7b521 LP |
304 | <varlistentry> |
305 | <term><keycap>P</keycap></term> | |
306 | ||
307 | <listitem><para>Toggle between counting all tasks, or only | |
308 | userspace processes. This setting may also be controlled using | |
309 | the <option>-P</option> command line switch (see | |
310 | above).</para></listitem> | |
311 | </varlistentry> | |
312 | ||
7fcfb7ee | 313 | <varlistentry> |
6d3eefd2 | 314 | <term><keycap>k</keycap></term> |
7fcfb7ee | 315 | |
03a7b521 LP |
316 | <listitem><para>Toggle between counting all tasks, or only |
317 | userspace processes and kernel threads. This setting may also | |
318 | be controlled using the <option>-k</option> command line | |
319 | switch (see above).</para></listitem> | |
7fcfb7ee LP |
320 | </varlistentry> |
321 | ||
322 | <varlistentry> | |
6d3eefd2 | 323 | <term><keycap>r</keycap></term> |
7fcfb7ee LP |
324 | |
325 | <listitem><para>Toggle between recursively including or | |
03a7b521 LP |
326 | excluding processes in child control groups in control group |
327 | process counts. This setting may also be controlled using the | |
328 | <option>--recursive=</option> command line switch. This key is | |
a8eaaee7 | 329 | not available if all tasks are counted, it is only available |
03a7b521 LP |
330 | if processes are counted, as enabled with the |
331 | <keycap>P</keycap> or <keycap>k</keycap> | |
332 | keys.</para></listitem> | |
7fcfb7ee LP |
333 | </varlistentry> |
334 | ||
798d3a52 ZJS |
335 | </variablelist> |
336 | </refsect1> | |
337 | ||
338 | <refsect1> | |
339 | <title>Exit status</title> | |
340 | ||
341 | <para>On success, 0 is returned, a non-zero failure code | |
342 | otherwise.</para> | |
343 | </refsect1> | |
344 | ||
345 | <refsect1> | |
346 | <title>See Also</title> | |
347 | <para> | |
348 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
349 | <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
350 | <citerefentry><refentrytitle>systemd-cgls</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
351 | <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
352 | <citerefentry project='man-pages'><refentrytitle>top</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
353 | </para> | |
354 | </refsect1> | |
caa94887 LP |
355 | |
356 | </refentry> |