Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Reexamination Certificate
2006-04-18
2006-04-18
Choi, Woo H. (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
C711S146000, C711S147000
Reexamination Certificate
active
07032079
ABSTRACT:
A system and method for managing memory data within a data processing system is disclosed. A main memory is provided to store data signals. When the main memory receives a request to read data signals, the main memory determines whether an updated copy of the requested data signals may be stored within some other storage device within the system. If so, the main memory issues a snoop request to this other storage device to cause any updated copy of the requested data to be returned to the main memory. In addition, the main memory reads the requested data signals from its data store. This data will be used to satisfy the read request if an updated copy of the data signals is not returned to the main memory in response to the snoop request. Otherwise, the updated copy is provided to fulfill the request.
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Bauman Mitchell A.
Carlin Jerome G.
Gilbertson R. Lee
Choi Woo H.
Johnson Charles A.
McMahon Beth L.
Starr Mark T.
Unisys Corporation
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