A system and method for effectively performing a clock adjustment procedure includes a multi-core processor that has a plurality of processor cores that each operate with reference to a target clock signal for performing various processing tasks. The processor cores include functional processor cores and one or more non-functional processor cores. A clock manager performs the clock adjustment procedure under control of a master processor core by selecting and applying a target clock frequency for the target clock signal. The target clock frequency is selected to allow the functional processor cores to compensate for the non-functional processor cores by collectively performing all of the required processing tasks.