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Cache consistency management method and node controller

A management method and consistent technology, applied in memory systems, instruments, electrical digital data processing, etc., can solve the problems of long query time, large area power consumption, and low query efficiency, and achieve the goal of reducing query time and improving query efficiency Effect

Active Publication Date: 2017-11-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The larger the capacity of the directory, the greater the area power consumption, the longer the query time, and the lower the query efficiency

Method used

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  • Cache consistency management method and node controller
  • Cache consistency management method and node controller
  • Cache consistency management method and node controller

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Embodiment Construction

[0079] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0080] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, ...

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Abstract

Embodiments of the present invention disclose a cache consistency management method and a node controller. The method is applied to a multi-processor system. The multi-processor system comprises a first form, a second form, and at least two nodes, wherein each node comprises at least one processor. The method comprises: determining a first entry corresponding to address information in the first form according to the address information of the data, wherein the first entry comprises a first field and a second field, the first field is used to record occupancy states of the data, and if the first field is in a monopolizing state, the second field is used to indicate a node that monopolizes the data; and if the first field is in a shared state, according to the address information of the data and the second field, determining a second entry in the second form, wherein the second entry comprises a third field, and the third field is used to indicate nodes that share the data. In the embodiments of the present invention, the capacity of the directory is reduced without affecting the accuracy of the directory query, so that the query time is reduced and the query efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of multiprocessor systems, in particular to a cache consistency management method and a node controller. Background technique [0002] A multiprocessor system refers to two or more processors with similar functions. The processors can exchange data with each other. All processors share memory, I / O devices, controllers, and external devices. The entire hardware system is controlled by a unified The operating system control realizes the comprehensive parallelism of jobs, tasks, programs, arrays and elements between processors and programs. [0003] Most commercial cache-coherent non-uniform memory access (Cache-Coherent Non-Uniform Memory Access, CC-NUMA) multiprocessor systems use a directory-based cache coherence protocol, and the memory of CC-NUMA multiprocessor systems is physically Is distributed, all local memory constitutes a shared global address space. The most significant advantage of the CC-NUMA m...

Claims

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Application Information

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IPC IPC(8): G06F12/0817G06F12/0842
CPCG06F12/0813G06F12/0826G06F12/0824G06F12/0828G06F2212/621G06F12/1009
Inventor 李涛程永波贺成洪
Owner HUAWEI TECH CO LTD