Various systems and methods for using a directory based coherency protocol in a system that employs a split ownership and access right cache coherence mechanism are disclosed. A computer system may include a directory, several active devices configured to access data, an address network configured to...http://www.google.com.hk/patents/US6973545?utm_source=gb-gplus-share專利 US6973545 - System with a directory based coherency protocol and split ownership and access right coherence mechanism
