Page table cache optimization method and page table updating method

Abstract

The invention discloses a page table cache optimization method and a page table updating method and device. Before a module is created on a physical machine, attribute information of the module and/or currently available page table cache resources are/is obtained. The attribute information is information related to the demand degree of the module on the page table cache. And configuring a page table cache of a first page size for the module, wherein the first page size is set based on the attribute information and/or page table cache resources. Therefore, balanced allocation of the page table caches of the modules created on the physical machine can be realized under the condition of fully considering the module characteristics and the available resources of the system.

Description

technical field [0001] The present disclosure relates to the field of information technology, in particular to a page table cache optimization method and a page table update method. Background technique [0002] The traditional MMU (Memory Management Unit, memory management unit) converts the virtual address accessed by the CPU into an actual physical address. IOMMU (Input / Output Memory Management Unit) converts the virtual address of the virtual machine accessed by the device into a physical address. [0003] In the virtualization of the pass-through device, the mapping between the device virtual address (IOVA) and the real physical address (HPA) can be realized through the IOMMU. This mapping relationship is stored in the system's IOMMU page table. Like the traditional MMU page table, the IOMMU page table is also composed of multiple levels of page tables. By checking the IOMMU page table level by level, the mapping relationship between IOVA and HPA can be obtained. [...

AI Technical Summary

Problems solved by technology

If the address to be queried is not in the page table entry of the TLB cache, it will caus

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