Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Reexamination Certificate
2006-03-21
2006-03-21
Verbrugge, Kevin (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
C711S147000, C711S148000
Reexamination Certificate
active
07017011
ABSTRACT:
A coherence controller is included in a module which includes a plurality of multiprocessor units, each of which contains a main memory and processors equipped with respective cache memories. The module may be one of a plurality of similarly constructed modules connected by a router or other type of switching device. The coherence controller in each module includes a cache filter directory having a first filter directory for guaranteeing coherence between the local main memory and the cache memory in each of the processors of the module, and an external port connected to at least one of the other modules. The cache filter directory also includes a complementary filter directory, which tracks locations of lines or blocks of the local main memory copied from the module into other modules, and for guaranteeing coherence between the local main memory and the cache in each of the processors of the module and the other modules.
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Bernard Christian
Koumou Pamphile
Lesmanne Sylvie
Bull S.A.
Kondracki Edward J.
Miles & Stockbridge P.C.
Verbrugge Kevin
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