Manual: systemd-cgtop

SYSTEMD-CGTOP(1)					systemd-cgtop					    SYSTEMD-CGTOP(1)

NAME
       systemd-cgtop - Show top control groups by their resource usage

SYNOPSIS

       systemd-cgtop [OPTIONS...] [GROUP]

DESCRIPTION
       systemd-cgtop 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 top(1). If
       a control group path is specified, shows only the services of the specified control group.

       If systemd-cgtop is not connected to a tty, no column headers are printed and the default is to only run one
       iteration. The --iterations= argument, if given, is honored. This mode is suitable for scripting.

       Resource usage is only accounted for control groups with the appropriate controllers turned on: "memory" controller
       for memory usage and "io" controller for disk I/O consumption. If resource monitoring for these resources is
       required, it is recommended to add the MemoryAccounting=1 and IOAccounting=1 settings in the unit files in question.
       See systemd.resource-control(5) for details.

       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
       "/proc/cpuinfo".

       To emphasize: unless "MemoryAccounting=1" and "IOAccounting=1" are enabled for the services in question, no resource
       accounting will be available for system services and the data shown by systemd-cgtop will be incomplete.

OPTIONS
       The following options are understood:

       -p, --order=path
	   Order by control group path name.

       -t, --order=tasks
	   Order by number of tasks/processes in the control group.

       -c, --order=cpu
	   Order by CPU load.

       -m, --order=memory
	   Order by memory usage.

       -i, --order=io
	   Order by disk I/O load.

       -b, --batch
	   Run in "batch" mode: do not accept input and run until the iteration limit set with --iterations= is exhausted or
	   until killed. This mode could be useful for sending output from systemd-cgtop to other programs or to a file.

	   Added in version 188.

       -r, --raw
	   Format byte counts (as in memory usage and I/O metrics) and CPU time with raw numeric values rather than
	   human-readable numbers.

	   Added in version 221.

       --cpu=percentage, --cpu=time
	   Controls whether the CPU usage is shown as percentage or time. By default, the CPU usage is shown as percentage.
	   This setting may also be toggled at runtime by pressing the % key.

	   Added in version 226.

       -P
	   Count only userspace processes instead of all tasks. By default, all tasks are counted: each kernel thread and
	   each userspace thread individually. With this setting, kernel threads are excluded from the count and each
	   userspace process only counts as one task, regardless of how many threads it consists of. This setting may also
	   be toggled at runtime by pressing the P key. This option may not be combined with -k.

	   Added in version 227.

       -k
	   Count only userspace processes and kernel threads instead of all tasks. By default, all tasks are counted: each
	   kernel thread and each userspace thread individually. With this setting, kernel threads are included in the count
	   and each userspace process only counts as one task, regardless of how many threads it consists of. This setting
	   may also be toggled at runtime by pressing the k key. This option may not be combined with -P.

	   Added in version 226.

       --recursive=
	   Controls whether the number of processes shown for a control group shall include all processes that are contained
	   in any of the child control groups as well. Takes a boolean argument, which defaults to "yes". If enabled, the
	   processes in child control groups are included, if disabled, only the processes in the control group itself are
	   counted. This setting may also be toggled at runtime by pressing the r key. Note that this setting only applies
	   to process counting, i.e. when the -P or -k options are used. It has no effect if all tasks are counted, in which
	   case the counting is always recursive.

	   Added in version 226.

       -n, --iterations=
	   Perform only this many iterations. A value of 0 indicates that the program should run indefinitely.

	   Added in version 188.

       -1
	   A shortcut for --iterations=1.

	   Added in version 238.

       -d, --delay=
	   Specify refresh delay in seconds (or if one of "ms", "us", "min" is specified as unit in this time unit). This
	   setting may also be increased and decreased at runtime by pressing the + and - keys.

       --depth=
	   Maximum control group tree traversal depth. Specifies how deep systemd-cgtop 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.

       -M MACHINE, --machine=MACHINE
	   Limit control groups shown to the part corresponding to the container MACHINE. This option may not be used when a
	   control group path is specified.

	   Added in version 227.

       -h, --help
	   Print a short help text and exit.

       --version
	   Print a short version string and exit.

KEYS
       systemd-cgtop is an interactive tool and may be controlled via user input using the following keys:

       h
	   Shows a short help text.

       Space
	   Immediately refresh output.

	   Added in version 226.

       q
	   Terminate the program.

       p, t, c, m, i
	   Sort the control groups by path, number of tasks, CPU load, memory usage, or I/O load, respectively. This setting
	   may also be controlled using the --order= command line switch.

       %
	   Toggle between showing CPU time as time or percentage. This setting may also be controlled using the --cpu=
	   command line switch.

	   Added in version 201.

       +, -
	   Increase or decrease refresh delay, respectively. This setting may also be controlled using the --delay= command
	   line switch.

       P
	   Toggle between counting all tasks, or only userspace processes. This setting may also be controlled using the -P
	   command line switch (see above).

	   Added in version 227.

       k
	   Toggle between counting all tasks, or only userspace processes and kernel threads. This setting may also be
	   controlled using the -k command line switch (see above).

	   Added in version 226.

       r
	   Toggle between recursively including or excluding processes in child control groups in control group process
	   counts. This setting may also be controlled using the --recursive= command line switch. This key is not available
	   if all tasks are counted, it is only available if processes are counted, as enabled with the P or k keys.

	   Added in version 226.

EXIT STATUS
       On success, 0 is returned, a non-zero failure code otherwise.

SEE ALSO
       systemd(1), systemctl(1), systemd-cgls(1), systemd.resource-control(5), top(1)

systemd 259.5												    SYSTEMD-CGTOP(1)