Cache with reduced tag information storage

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

Patent

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Details

711122, 711119, 711120, 711128, G06F 1200

Patent

active

061227099

ABSTRACT:
A cache memory system including a cache memory having a plurality of cache lines. An index portion of a tag array includes an n-bit pointer entry for every cache line. A shared tag portion of a tag array includes a number of entries, where each entry includes shared tag information that is shared among a plurality of the cache lines. Each n-bit pointer in the index portion of the tag array points into an entry in the shared tag portion.

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Hong Wang et al.; CAT--Caching Address Tags a Technique for Reducing Area Cost of On-Chip Caches; Jun. 22, 1995; pp 381-390.
Yonghwan Lee et al., "Shared tag For MMU and Cache Memory", Semiconductor International Conference, vol. 1, pp. 77-80m Oct. 1997.
Hong Wang et al. "CAT--Caching Address Tags--A Technique For Reducing Area Cost of On-Chip Caches", pp. 381-390, Jun. 1995.
Article "Minimizing Area Cost of On-Chip Cache Memories by Caching Address Tags" by H. Wang et al., IEEE Transactions on Computers, vol. 46, No. 11, Nov. 1997, pp. 1187-1201.
Article "Decoupled Sectored Caches: Conciliating Low Tag Implementation Cost and Low Miss Ratio" by A. Seznec, 8345, Computer Architecture News 22, Apr., No. 2, pp. 384-393.

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