1. A method of operating a data processing system that includes an interconnect and a plurality of processor units coupled to the interconnect, the method comprising: determining that a request to change a current command rate of a fabric arbiter of the interconnect was not received within a first sample window; determining whether a incremental rate increase is to be utilized; in response to determining the incremental rate increase is to be utilized, configuring a first new command rate to a command rate level incrementally greater than the current command rate; in response to determining the incremental rate increase is not to be utilized, configuring the first new command rate to a predetermined command rate greater than the current command rate; and issuing, to the fabric arbiter of the interconnect, a first change rate command that includes the first new command rate.