Abstract: A program optimization method according to the present invention includes a processing range decision step for deciding a part of a machine language program as a processing range to which a program optimization is applied based on a description included in a high-level language program, and an allocation decision step for deciding an allocation position of an instruction code in the processing range. The description specifies a correlative relation between a plurality of processing blocks of the high-level language program. In the processing range decision step, a program part equivalent to the processing blocks confirmed as having a correlative relation therebetween by a description of the machine language program is determined as the processing range. In the allocation decision step, the allocation position of the instruction code in the processing range is determined for each of the processing blocks based on the correlative relation specified by the description.

Abstract: To lighten the load on a processor in DMA transfer, a DMA transfer apparatus 13 for executing DMA transfer between local memory 16 that each processor has and global memory 15 shared by the processors, wherein a DMA transfer termination notification is issued to the destination determined by referencing a table 14 for managing destinations to which a notification of DMA transfer termination is to be sent.