| 摘要 |
A number of caching agents are interconnected by a ring. A number of trackers of a home agent are pre-allocated to each of the number of caching agents. A tracker provides a permit for a caching agent to issue a request to the home agent. In case a caching agent needs to issue more requests to the home agent, the caching agent may borrow a tracker from another caching agent by sending a message via the ring to other caching agents. A caching agent receiving the borrowing message may either respond the borrowing message by lending a tracker pre-allocated to the corresponding caching agent, or deny the borrowing request by forwarding the borrowing message to another caching agent. |
