Virtual memory cache for use in multi-processing systems

Details Virtual memory cache for use in multi-processing systems Virtual memory cache for use in multi-processing systems

1986-11-12

1989-06-27

Chan, Eddie P.

Boots, shoes, and leggings

364243, 3642434, 36424341, 36424344, G06F 1200, G06F 1206, G06F 1300

Patent

active

048435422

ABSTRACT:
A system for maintaining data consistency among distributed processors, each having its associated cache memory. A processor addresses data in its cache by specifying the virtual address. The cache will search its cells for the data associatively. Each cell has a virtual address, a real address, flags and a plurality of associated data words. If there is no hit on the virtual address supplied by the processor, a map processor supplies the equivalent real address which the cache uses to access the data from another cache if one has it, or else from real memory. When a processor writes into a data word in the cache, the cache will update all other caches that share the data before allowing the write to the local cache.

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