1. A method of dispatching fixed priority threads in a multiple processor system having a plurality of processors, the multiple processor system having a plurality of local run queues, each of the plurality of processors being associated with at least one of the plurality of local run queues, the method comprising: identifying a first local run queue from the plurality of local run queues, the first local run queue having a fixed priority thread at the top of the first local run queue; identifying an executing thread on one of the plurality of processors, the executing thread having a lower priority than the fixed priority thread; and displacing the executing thread with the fixed priority thread.