What is Intel VT-x technology in CPU?

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Intel® Virtualization Technology (Intel® VT) represents a growing portfolio of technologies and features that make virtualization practical by eliminating performance overheads and improving security. Intel® VT provides hardware assist to the virtualization software, reducing its size, cost, and complexity

What is Intel VT?

Intel VT (Virtualization Technology) is the company's hardware assistance for processors running virtualization platforms.

Intel VT includes a series of extensions for hardware virtualization. The Intel VT-x extensions are probably the best recognized extensions, adding migration, priority and memory handling capabilities to a wide range of Intel processors. By comparison, the VT-d extensions add virtualization support to Intel chipsets that can assign specific I/O devices to specific virtual machines (VM)s, while the VT-c extensions bring better virtualization support to I/O devices such as network switches.

http://www.intel.com/content/www/us/en/virtualization/virtualization-technology/intel-virtualization-technology.html

Virtualization abstracts hardware that allows multiple workloads to share a common set of resources. On shared virtualized hardware, a variety of workloads can co-locate while maintaining full isolation from each other, freely migrate across infrastructures, and scale as needed.

Businesses tend to gain significant capital and operational efficiencies through virtualization because it leads to improved server utilization and consolidation, dynamic resource allocation and management, workload isolation, security, and automation. Virtualization makes on-demand self-provisioning of services and software-defined orchestration of resources possible, scaling anywhere in a hybrid cloud on-premise or off-premise per specific business needs.

Intel® Virtualization Technology (Intel® VT) represents a growing portfolio of technologies and features that make virtualization practical by eliminating performance overheads and improving security. Intel® VT provides hardware assist to the virtualization software, reducing its size, cost, and complexity. Special attention is also given to reduce the virtualization overheads occurring in cache, I/O, and memory. Over the last decade or so, a significant number of hypervisor vendors, solution developers, and users have been enabled with Intel® VT, which is now serving a broad range of customers in the consumer, enterprise, cloud, communication, technical computing, and many more sectors.

Several Intel CPUs come with the Intel Virtualization Technology (VT). Formerly known as Vanderpool, this technology enables a CPU to act as if you have several independent computers, in order to enable several operating systems to run at the same time on the same machine