Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Reexamination Certificate
2006-08-08
2006-08-08
Kim, Matthew (Department: 2186)
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
C711S145000, C711S147000, C711S120000
Reexamination Certificate
active
07089372
ABSTRACT:
Information regarding memory access by other nodes within a coherency controller of a node is locally stored. The coherency controller receives a transaction relating a line of local memory of the node. In response to locally determining that the line of the local memory is not being cached by another node and/or has not been modified by another node, the coherency controller processes the transaction without accessing tag directory information regarding the line. A table within the controller may store entries corresponding to local memory sections. Each entry includes a count value tracking a number of lines of the section being cached by other nodes, and a count value tracking a number of lines of the section that have been modified by other nodes. The table may also include flags corresponding to the sections, each flag indicating the validity of the section's contents.
REFERENCES:
patent: 5829052 (1998-10-01), Pawlowski et al.
patent: 6088769 (2000-07-01), Luick et al.
patent: 6275900 (2001-08-01), Liberty
patent: 6651157 (2003-11-01), Galles et al.
patent: 6950913 (2005-09-01), Glasco
patent: 2001/0034816 (2001-10-01), Michael et al.
patent: 2002/0095554 (2002-07-01), McCrory et al.
patent: 2003/0009634 (2003-01-01), Arimilli et al.
DeSota Donald R.
Durr William
Joersz Robert
Miller Davis A.
International Business Machines - Corporation
Kim Matthew
Krofcheck Michael
Raissinia Abdy
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