METHOD AND DEVICE FOR MAINTAINING CACHE DATA CONSISTENCY ACCORDING TO DIRECTORY INFORMATION

摘要

Provided are a method and device for maintaining Cache data consistency according to directory information. The method comprises: receiving a data block state change request (101); determining a specified data block in a system region of a main memory according to the data block state change request (102); determining a target processor according to directory information stored in the main memory, wherein the target processor refers to a processor which has stored the specified data block in a processor Cache (103); and sending a state change indication to the target processor, wherein the data block state change request is used to request the target processor to change the state of the specified data block cached in a target processor Cache (104). By adopting the method, directory information is stored in a main memory, so that the usage of a directory storage space of an interconnection chip can be avoided, and the difficulty of designing and implementing a NUMA system can be decreased.