| 摘要 |
<P>PROBLEM TO BE SOLVED: To dynamically change prefetch sizes of a prefetch buffer. <P>SOLUTION: A mode change register 250 instructs mode change of a prefetch size of a prefetch buffer 210 through a processor. A mode change instruction detection part 225 detects the instruction to change a mode of the prefetch size of the prefetch buffer 210. A transfer state monitor part 242 monitors a state of whether data transfer processing of a data transfer processing part 241 is being executed. A mode change part 227 smoothly changes the prefetch size of the prefetch buffer 210 on condition that the data transfer processing is not being executed when the mode change instruction is detected. On the other hand, if the data transfer processing is being executed when the mode change instruction is detected, the mode change part 227 changes the prefetch size after the data transfer processing is completed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
