Cache system with groups of lines and with coherency for...

Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories

Reexamination Certificate

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C707S793000, C711S118000

Reexamination Certificate

active

10649917

ABSTRACT:
In a computer system with caching, memory transactions can retrieve and store groups of lines. Coherency states are maintained for groups of lines, and for individual lines. A single coherency transaction, and a single address transaction, can then result in the transfer of multiple lines of data, reducing overall latency. Even though lines may be transferred as a group, the lines can subsequently be treated separately. This avoids many of the problems caused by long lines, such as increased cache-to-cache copy activity.

REFERENCES:
patent: 5615334 (1997-03-01), Wang et al.
patent: 6374332 (2002-04-01), Mackenthun et al.
patent: 6412046 (2002-06-01), Sharma et al.
patent: 6493809 (2002-12-01), Safranek et al.
patent: 6647453 (2003-11-01), Duncan et al.
patent: 6711662 (2004-03-01), Peir et al.
Microsoft Computer Dictionary, 5th Edition, 2002, Microsoft Press pp. 77-78.
Handy, Jim, The Cache Memory Book Second Edition, 1998, pp. 67-69 and 202.

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