| 摘要 |
A computer system (10) includes a node controller (12) operable to process invalidation requests. The node controller (12) includes a network interface unit (20), a memory directory interface unit (22), a processor interface unit (24), an input/output interface unit (26), a local buffer unit (28), and a crossbar unit (30). A local processor (16) generates an invalidation request that is processed by the processor interface unit (24) for placement into the local buffer unit (28). The invalidation request indicates that particular data within a local memory (18) associated with the node controller (12) has been altered by the local processor (16). The local buffer unit (28) generates a plurality of invalidation messages in response to the invalidation request, the invalidation messages being destined for remote processors (16) associated with remote node controllers (12) in the computer system (10) that share the particular data. The crossbar unit (30) arbitrates the transfer of the invalidation messages with data, control messages, and other traffic to and from all units associated with the node controller (12) so that the node controller (12) is not clogged with the transfer of invalidation messages.
|
