Directory cache method for node control chip in cache coherent non-uniform memory access (CC-NUMA) system

Abstract

The invention provides a directory cache method for a node control chip in a cache coherent non-uniform memory access (CC-NUMA) system. A directory cache module is designed for achieving and optimizing the access control of a memory. In researches and designs of computer architectures, locality of application program access is often considered, wherein the phenomenon that recently visited data are revisited before long is called temporal locality; and based on the characteristic, the cache is introduced in the CC-NUMA system based on a directory for caching directory entries, and a least recently used (LRU) replacement algorithm is utilized, so that visiting pressure of the directory is well reduced, and a bottleneck effect of the visiting of the memory is relieved.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a method for node control chip directory Cache in a CC-NUMA (Cache Coherent Non-Uniform Memory Access) system. Background technique [0002] As the application of high-performance computing becomes more and more extensive and in-depth, the architecture and implementation of high-performance computers are facing higher and higher requirements, and the CC-NUMA structure is one of the important architectures. The construction of a large-scale CC-NUMA system is constrained by many factors, among which the Cache coherence protocol is the key factor restricting the scalability of the system. In order to solve this problem, in addition to designing an effective protocol, researching the scalable directory structure and efficient directory storage access mechanism in the system can ensure the efficient implementation of the directory-based Cache consistency protocol. [0003] The dire...

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Problems solved by technology

For example, some systems use a fully mapped directory structure. Even if such a system uses a