Resource set attribute
The resource set attribute (called rset) can be specified for any class. Its value is the name of a resource set defined by the system administrator.
The rset attribute represents a subset of the CPU resource available on the system (processor set). The default is "system," which gives access to all the CPU resources available on the system. The only restriction is that if an rset is specified for a subclass, the set of CPUs in the the set must be a subset of the CPUs available to the superclass. (For detailed information, see the mkrset command.
Note: Carefully consider assigning resource sets to any class that is not
in tier 0. Because lower tiers only have access to the resources that are
unused by the higher tiers, restricting a non-tier-0 class to a subset of
the CPUs on the system could result in starvation if there is no CPU time
available on those CPUs.