Multiprocessor system

A multiprocessor system includes a processor unit including a core A including a first processing mechanism for improving processing performance of data processing and a PM unit for collecting usage information of hardware resources being used or used in data processing and a core B having a second processing mechanism adopting the same processing system as the first processing mechanism and being inferior in processing performance to the first processing mechanism; and a scheduler for supplying a task not previously executed to the core A and a task to be re-executed to one of processor cores (A and B) to process the task, selected out of the processor unit by referencing the usage information of the hardware resources of the task previously collected in the PM unit at the execution time of application software including a plurality of tasks containing the same task.