Multi-core system, scheduling method, and computer product

A multi-core system enabling a plurality of cores to simultaneously execute a task, the multi-core system comprising:

• a memory storing:
• task information including for each task, deadline information indicating a deadline for completion of the task and execution period information indicating an execution period of the task and corresponding to cache utilization rates for each core, and
• power information including for each core, source voltage information indicating a source voltage with which the core can operate and power deriving information for deriving power consumption based on the source voltage;
• and
• a core configured to:
• estimate a process period of the task, based on the execution period information and usable-cache size information, and
• set a task assignment pattern so that within a range where the estimated process period of the task satisfies a real-time restriction indicated by the deadline information, a cache size used by the task is minimized and power consumption that is based on the source voltage information and the power deriving information is minimized.