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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
~]$ cat /proc/cgroups
Alternatively, to find the mount points of particular subsystems, execute the following command:
lssubsys -m controllers
~]$ lssubsys -m controllers
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
~]# lscgroup
To restrict the output to a specific hierarchy, specify a controller and a path in the format
controller:path. For example:
lscgroup cpuset:adminusers
~]$ lscgroup cpuset:adminusers
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
~]$ cgget -r parameter list_of_cgroups
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 /
~]$ cgget -g cpuset /
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