1. A computing system comprising: one or more multicore processors, wherein each multicore processor comprises a set of one or more processing units, wherein each processing unit is operable at a variable frequency; a main memory, wherein the main memory is operable at a variable frequency; and a feedback controller, wherein the feedback controller is configured to control the variable frequency of a processing unit of the set of one or more processing units, wherein the feedback controller is configured to operate a first predictive model of performance measurement for a first application by determining a first application specific performance measurement dependent on a sum of weighted linear frequencies of a first subset of the one or more processing units which the first application is supposed to run on, and a weighted linear frequency of the main memory, wherein the feedback controller is configured to control the variable frequency of each processing unit of the first subset and control the frequency of the main memory, wherein the feedback controller determines the frequency of each said processing unit of the first subset and the main memory from a minimized value of a weighted sum of power consumption of the first subset and a first performance degradation of the first application, wherein the first performance degradation of the first application is defined as a deviation of the first application specific performance measurement from the first predictive model of performance measurement.