Directory-based coherency system for maintaining coherency in a

Details Directory-based coherency system for maintaining coherency in a Directory-based coherency system for maintaining coherency in a

1996-12-09

2000-06-20

Nguyen, Hiep T.

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

711120, 711121, 711143, 711145, 711148, 711149, 711153, 711156, G06F 1208

Patent

active

060789972

ABSTRACT:
Method and apparatus for using one bit per line of system memory to maintain coherency in a dual-ported memory system. The states of the bit are "Owned" and "Unowned." The state of the bit is used to filter the number of cycles required to maintain coherency. The bits are stored within the system memory.

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"A New Solution to Coherence Problems in Multicache Systems," Censier, Lucien M., et al., IEEE Transactions on Computers, vol. C-27, No. 12, Dec. 1978, pp. 1112-1118.

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