Look-up filter structures, systems and methods for filtering...

Details Look-up filter structures, systems and methods for filtering... Look-up filter structures, systems and methods for filtering...

2006-06-02

2009-08-04

Shah, Sanjiv (Department: 2185)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

C711S131000, C711S220000

Reexamination Certificate

active

07571281

ABSTRACT:
In one embodiment, an apparatus includes an input port to receive a request to determine whether data units are stored in the cache, as well as an output port to generate look-ups for the pool of tags. The apparatus also includes a look-up filter coupled to the input and output ports, and operates to filter out superfluous look-ups for the data units, thereby forming filtered look-ups. Advantageously, the look-up filter can filter out superfluous look-ups to at least reduce the quantity of look-up operations associated with the request, thereby reducing stalling associated with multiple look-up operations. In a specific embodiment, the look-up filter can include a data unit grouping detector and a look-up suppressor.

REFERENCES:
patent: 5854637 (1998-12-01), Sturges
patent: 2004/0243764 (2004-12-01), Miller

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