Adaptive range snoop filtering methods and apparatuses

Details Adaptive range snoop filtering methods and apparatuses Adaptive range snoop filtering methods and apparatuses

2007-03-31

2010-06-01

Chery, Mardochee (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

C711S141000

Reexamination Certificate

active

07730266

ABSTRACT:
Snoop filtering methods and apparatuses for systems utilizing memory are contemplated. Method embodiments comprise receiving a request for contents of a memory line by a home agent, comparing an address of the memory line to a range in a set of adaptive ranges, and snooping an I/O agent for the contents upon a match of the address within the range. Apparatus embodiments comprise a range table, a table updater, a receiver module, and a range comparator. The range tables allow for the tracking of memory addresses as I/O agents assert ownership of the addresses. Employing a range-based snoop filtering approach may allow home agents to track a collection of addresses, in adaptable ranges, instead of tracking precise addresses which may require large quantities of memory to implement.

REFERENCES:
patent: 7089376 (2006-08-01), Dieffenderfer et al.
patent: 7308538 (2007-12-01), Shen
patent: 7437520 (2008-10-01), Shen et al.
patent: 2006/0095684 (2006-05-01), Shen

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