<p>In order to effect performance assurance in a real time system by the task breakdown caused by the competition among a plurality of processors to access a shared resource, each of a plurality of processors provided in a multiprocessor system (100) comprises a task scheduler (201) which determines the task execution order of the tasks included in a task set that are to be executed by the plurality of processors and the processor for executing each task within a task cycle given as one cycle of a repeatedly executed task set; and the multiprocessor system (100) comprises a scheduler management device (300) which has an instruction unit (310) for instructing a change in the task execution order for at least one of the plurality of the task schedulers (201); wherein when receiving an instruction from the instruction unit (310), each of the plurality of the task schedulers (201) changes the task execution order among the plurality of processors.</p>
