| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the load of a snoop bus connecting a plurality of cache units and a memory management unit(directory side) at a main storage side. <P>SOLUTION: When latest data are not stored in a main storage 28, but stored in a plurality of cache units 18, one of the plurality of cache units owns a write ownership for copying the latest data back to the main storage 28. In this status, when the replacement of the latest data is generated by a processor 16 by the cache unit having the write ownership, the write ownership is transferred to the cache unit having the latest data, and the copy back of the latest data to the main storage 28 is suppressed from being performed until the cache unit owning the latest data becomes one. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
