Access method and device for cache coherent-non uniform memory access system

A memory access and cache technology, applied in the computer field, can solve problems such as long delays in IO data access

Active Publication Date: 2013-04-03
XFUSION DIGITAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a CC-NUMA...

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  • Access method and device for cache coherent-non uniform memory access system
  • Access method and device for cache coherent-non uniform memory access system
  • Access method and device for cache coherent-non uniform memory access system

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0029] figure 1 is a schematic block diagram of a CC-NUMA system 10 in the related art. Such as figure 1 As shown, system 10 includes multiple CPUs, such as CPU0-CPU7, and multiple NCs, such as NCO-NC3. The CPU itself has an interface for interconnecting with other external CPUs. Optionally, the CC-NUMA system of multiple CPUs can be interconnected and expanded through NC. The CPU includes a cache agent (CA, Cache Agent). In addition, the CPU is connec...

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Abstract

The embodiment of the invention provides an access method and device for CC-NUMA (cache coherent-non uniform memory access) system. The method comprises the following steps that a node controller (NC) records an IO (input/output) history record, wherein the IO history record means the history statistic record of propelled IO data of a cache (CA) from an IOH (input/output hub) to at least one CPU (central processing unit) through the NC aiming to at least one designated address; when the NC determines that the IO history record meets the preset condition, the NC sends a pre-extraction prompting message to the CA of the remote CPU, and the pre-extraction prompting message is used for initiating pre-fetch access of the IO data by the CA of the remote CPU aiming at the address in the pre-extraction prompting message. By adopting such a technical scheme, through analyzing whether the history record meets the preset condition, the IO data prompting message aiming at the designated address is actively sent to the CA of the remote CPU, and moreover, the remote CPU initiates an IO data pre-fetch operation aiming at the designed address in advance, thus, the access delay of the remote IO data is shortened, and the performance of the system is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of computers, and more specifically, relate to an access method and device for a Cache Coherent-Non Uniform Memory Access (CC-NUMA, Cache Coherent-Non Uniform Memory Access) system. Background technique [0002] In the CC-NUMA system based on node (Node) control, with the increase of system scale, the delay of cross-node access becomes more and more the bottleneck of system performance improvement. Therefore, how to dynamically detect system-wide hotspots, and push the hotspot cache to the remote CPU (Central Processing Unit, central processing unit) that is most likely to use the content as early as possible will significantly improve the passive access of the existing system. disadvantage. In the CC-NUMA system based on the node controller (Node Controller, NC), the access delay of IO (Input / Output, input or output) data is too long, which often leads to low performance of the entire computer ...

Claims

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Application Information

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IPC IPC(8): G06F15/17
Inventor 陈昊徐建荣王工艺
Owner XFUSION DIGITAL TECH CO LTD
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