Method and device for achieving SR-IOV network card, and method and device for achieving live migration

Abstract

The invention discloses a method and device for achieving a single-root input / output virtualization (SR-IOV) network card, and a method and device for achieving live migration. The method for achieving the SR-IOV network card comprises the following steps: when a virtual client needs to send data, a user mode virtNIC-FE sends data to be sent, which is stored in a user mode memory, to a user mode virtNIC-BE; the user mode virtNIC-BE sends the data to be sent to a user mode virtual function (VF) Driver; and the user mode VF Driver sends the data to be sent to a corresponding VF. The method and device for achieving the SR-IOV network card and the method and device for achieving live migration adopting the technical scheme have the advantages that data sending is achieved through the user mode virtNIC-FE, the user mode virtNIC-BE, and the user mode VF Driver, so that data copying from the user mode memory to a kernel mode memory and switching between a user space and a kernel space are not required, and the network performance of the virtual client is improved.

Description

technical field [0001] The present invention relates to Single Root I / O Virtualization (SR-IOV, Single Root I / OVirtualization) technology, in particular to a method and device for realizing SR-IOV network card, and a method and device for realizing dynamic migration. Background technique [0002] Cloud computing is a very popular cutting-edge technology at present, and a very important feature of cloud computing is virtualization. After using virtualization technology, users can obtain application services at any location and using various terminals. The resources used by these applications come from the "cloud" rather than fixed physical entities. The application is somewhere in the "cloud," but the user doesn't really need to know or worry about where the application is running. Users only need a laptop or a mobile phone to achieve everything we need through network services, even tasks such as supercomputing. In order to meet this feature of users, the cloud computing ...

AI Technical Summary

Problems solved by technology

[0014] In the existing method for realizing the SR-IOV network card, when sending and receiving data, the kernel state virtNIC-BE needs to copy the data from the user state memory to the kernel state memory, or copy the data from the kernel state memory to the user state memory, and The host needs to switch between user space and kernel space, resulting in poor network performance of the virtual guest

According to the test data, in this case, the performance of a VF can only reach about 50% of the performance of the bare metal host machine, which cannot meet the performance indicators in virtualized data centers or telecom applications.

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