Memory access method, device and system

Abstract

The embodiment of the invention provides a memory access method, device and system. The memory access method comprises the following steps: monitoring information sent by an operating system is received by a node controller, and carries information of the monitored memory in a first node to which the node controller belongs, the monitored memory is the memory resource occupied by the target process on the first node, the target process is a process which operates on a central processing unit (CPU) of the first node, and accesses the memory of a visited node, beyond the first node, of a server system; if the phenomenon that the access frequentness of the target process occupying the monitored memory to the memory of the accessed node is greater than or equal to the threshold value is monitored, the information of the visited node is sent to the operating system, so that the target process is transferred to the visited node according to the information of the visited node; the remote memory access is switched into the local memory access or the nearby memory access, so that the time of visiting the memory through the target process can be reduced, and the performance of the server system is efficiently improved.

Description

technical field [0001] The embodiments of the present invention relate to computer technology, and in particular to a memory access method, device and system. Background technique [0002] With the development of computer technology, a server system can be composed of one or more servers, and each server serves as a node, forming a Non-Uniform Memory Access (NUMA) architecture. [0003] In a server system with NUMA architecture, each node may include one or more central processing units (Central Processing Unit, CPU), and each CPU may be pre-configured with certain memory resources. Processes running on the CPU can use the following three methods to access memory resources in the server system, namely local (local) memory access, neighboring (buddy) memory access, and remote (remote) memory access. [0004] The process running on the CPU accesses the CPU's own memory resources, that is, local memory access; the process running on the CPU accesses the memory resources of oth...

AI Technical Summary

Problems solved by technology

[0005] Among these three memory access methods, the time required for remote memory access by the process running on the CPU is longer, which may be 3-20 times the time required for local memory access. Therefore, the CPU in the existing server system When the process running on the remote memory access method accesses memory resources, the overall performance of the system will be reduced

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