A data processing method, a computer readable medium, and a data processing device capable of improving processing efficiency are provided. A storage destination of sub-read blocks is changed to a high-speed small-capacity memory on a high layer by adding a shape attribute in an attribute group for data blocks, adding a memory access monitoring unit for obtaining the shape attribute of a data block to the configuration of a data processing device, obtaining the shape attribute of the non-rectangular read block by executing a program on a trial basis, and propagating this shape attribute in a direction opposite to a data flow or a process flow within the program.