Adaptive snoop-and-forward mechanisms for multiprocessor...

Details Adaptive snoop-and-forward mechanisms for multiprocessor... Adaptive snoop-and-forward mechanisms for multiprocessor...

2008-07-21

2010-12-21

Song, Jasmine (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

C711S119000, C711S141000

Reexamination Certificate

active

07856535

ABSTRACT:
In a network-based cache-coherent multiprocessor system, when a node receives a cache request, the node can perform an intra-node cache snoop operation and forward the cache request to a subsequent node in the network. A snoop-and-forward prediction mechanism can be used to predict whether lazy forwarding or eager forwarding is used in processing the incoming cache request. With lazy forwarding, the node cannot forward the cache request to the subsequent node until the corresponding intra-node cache snoop operation is completed. With eager forwarding, the node can forward the cache request to the subsequent node immediately, before the corresponding intra-node cache snoop operation is completed. Furthermore, the snoop-and-forward prediction mechanism can be enhanced seamlessly with an appropriate snoop filter to avoid unnecessary intra-node cache snoop operations.

REFERENCES:
patent: 7174430 (2007-02-01), O'Krafka et al.
patent: 2003/0065843 (2003-04-01), Jones et al.
patent: 2005/0240735 (2005-10-01), Shen et al.

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