Explain and Understanding VT-d

Explain and Understanding VT-d

http://software.intel.com/en-us/videos/intel-virtualization-technology-pt-3-of-3-emerging-usage-models/VT-d direct assignment will help specific VM's where dedicated I/O resources & I/O performance is important eg. Mission critical apps in SCON, test & development.Direct communicate with Hardware like GPU?

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Here is a blog entry I wrote summarizing VT-d:


David Ott

Here is another good link, albeit a little dated:


The article is called "Intel Virtualization Technology for Directed I/O (VT-d): Enhancing Intel platforms for efficient virtualization of I/O devices".

David Ott

Last year, intel created a page about "Direct I/O for Cloud Computing". All the video fully explain about Direct I/O. Where is the page?

the "Download PDF" link of


is broken "and could not be repaired."

can you arrange to have it repaired?

Just checked the link and it seems to work okay for me. Sorry you are having trouble.

David Ott

Just checked the link and everything is good!

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