A memory management system includes a plurality of processors, a shared memory that can be accessed from the plurality of processors, cache memories provided between each processor of the plurality of processors and the shared memory and invalidation or write back of a specified region can be commanded from a program running on a processor. Programs running on each processor invalidate an input data region of a cache memory with an invalidation command immediately before execution of a program as a processing batch, and write back an output data region of a cache memory to the shared memory with a write back command immediately after execution of a program as a processing batch.