Linux KVM Virtualization Performance
For only being a release candidate the Linux 2.6.20 kernel has already generated quite a bit of attention. On top of adding asynchronous SCSI scanning, multi-threaded USB probing, and many driver updates, the Linux 2.6.20 kernel will include a full virtualization (not para-virtualization) solution. Kernel-based Virtual Machine (or KVM for short) is a GPL software project that has been developed and sponsored by Qumranet. In this article we are offering a brief overview of the Kernel-based Virtual Machine for Linux as well as offering up in-house performance numbers as we compare KVM to other virtualization solutions such as QEMU Accelerator and Xen.
What has been merged into the Linux 2.6.20 kernel is the device driver for managing the virtualization hardware. The other component that comprises KVM is the user-space program, which is a modified version of QEMU. Kernel-based Virtual Machine for Linux uses Intel Virtualization Technology (VT) and AMD Secure Virtual Machine (SVM/AMD-V) for hardware virtualization support. With that said, one of the presented hardware requirements to use KVM is an x86 processor with either of these technologies. The respective technologies are present in the Intel Core series and later, Xeon 5000 series and later, Xeon LV series, and AMD's Socket F and AM2 processors.
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