Efficient and Scalable Paravirtual I/O System

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Provided by: USENIX
Topic: Virtualization
Format: PDF
In recent years, hardware and software improvements for x86 machine virtualization made it possible to run virtualized workloads with performance approaching that of a physical machine (bare-metal performance). However, to achieve the desired bare-metal performance, I/O intensive virtual workloads require direct access to a hardware device. The most popular I/O virtualization method today is paravirtual I/O. Its popularity stems from its reasonable performance levels while allowing the host to interpose, i.e., inspect or control, the guest's I/O activity.
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