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Cache Coherency based on multilevel Directories

IP.com Disclosure Number: IPCOM000010839D
Original Publication Date: 2003-Jan-24
Included in the Prior Art Database: 2003-Jan-24

Publishing Venue

IBM

Abstract

This patent proposal describes a method for maintaining the cache coherence in a shared-memory multiprocessor. A directory based cache coherence protocol was selected. Several versions of a two level directory are described. The second level directory increases the hit-rate for the same size directory, or allow smaller directories to achieve the same hit rate