Memory access optimization method and memory access optimization system for NUMA (Non-Uniform Memory Access) architecture system in virtual machine environment

Abstract

The invention relates to a memory access optimization method and a memory access optimization system for an NUMA (Non-Uniform Memory Access) architecture system in a virtual machine environment. The method includes the following steps: under the virtual machine environment, the bandwidth pressure of a physical memory of each node in the NUMA architecture system is detected by a non-kernel part performance monitoring unit of a programmable processor in real time, and whether the bandwidth pressure of the physical memory of each node exceeds a preset level is judged; when the bandwidth pressure of the physical memory of a certain node exceeds the preset level, the global queue buffer pressure of the node is detected, and accordingly, the relation between the local memory access pressure and remote memory access pressure of the node is judged; when the remote memory access pressure of the node is higher than the local memory access pressure, the physical pages of the memory for non-local virtual machines in the node are migrated to other nodes; when the local memory access pressure of the node is higher than the remote memory access pressure, the frequency of second-level cache failure caused by each local virtual machine in the node within first preset time is detected, and the local virtual machines causing the least second-level cache failure frequency are scheduled to other nodes.

Description

technical field [0001] The present invention relates to the technical field of virtual machine scheduling, in particular to a memory access optimization method and system for a NUMA architecture system in a virtual machine environment. Background technique [0002] With the rise of cloud computing and big data, NUMA (Non-Uniform Memory Access, non-uniform memory access) system platform has become the main infrastructure of cloud computing and cloud storage, and NUMA architecture will gradually become the mainstream architecture of high-performance computing. At the same time, due to the high isolation of the virtual machine (the virtual machine is isolated from the underlying physical machine), it is easy for users to accept (it looks consistent with the ordinary machine that the user is used to), supports different operating systems and applications, and is low-cost. Due to the characteristics of risk and easy maintenance, virtual machines are widely used in both personal P...

AI Technical Summary

Problems solved by technology

However, because of the high isolation of the virtual machine, the guest operating system running on the virtual machine cannot correctly obtain the underlying hardware information, so that most performance analysis tools cannot run correctly in the virtual machine, causing NUMA memory access in the virtual machine environment Optimization brings great difficulty

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