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3.8. Obtaining Information about Control Groups


The libcgroup-tools package contains several utilities for obtaining information about controllers, control groups, and their parameters.

Listing Controllers

To find the controllers that are available in your kernel and information on how they are mounted together to hierarchies, execute:
~]$ cat /proc/cgroups
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Alternatively, to find the mount points of particular subsystems, execute the following command:
~]$ lssubsys -m controllers
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Here controllers stands for a list of the subsystems in which you are interested. Note that the lssubsys -m command returns only the top-level mount point per each hierarchy.

Finding Control Groups

To list the cgroups on a system, execute as root:
~]# lscgroup
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To restrict the output to a specific hierarchy, specify a controller and a path in the format controller:path. For example:
~]$ lscgroup cpuset:adminusers
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The above command lists only subgroups of the adminusers cgroup in the hierarchy to which the cpuset controller is attached.

Displaying Parameters of Control Groups

To display the parameters of specific cgroups, run:
~]$ cgget -r parameter list_of_cgroups
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where parameter is a pseudo-file that contains values for a controller, and list_of_cgroups is a list of cgroups separated with spaces.
If you do not know the names of the actual parameters, use a command similar to:
~]$ cgget -g cpuset /
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