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Originally Posted by ninjatux
Here's what I'm really wondering about, at least ever since I read that VMWare's model is to run as many instructions natively as possible. What's the role of CPU VT instructions, then? I thought that CPU VT instructions made this possible, but VMWare has been doing this before the instructions were ever available.
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VMWare Player/Server/Workstation do everything in software. The CPU virtualisation features aren't used. They do binary translation and patching of instructions in memory.
Latest versions of VMWare ESX/GSX, I believe, can make use of the virtualisation features in CPUs. But I have very little info on that subject.
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By the way, KVM was listed. I said "Qemu (various combos or not)".
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That's like having a poll with MS-DOS (various combos) and wondering why nobody using Windows ME participated in the poll.
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Xen is in a class all on its own, which is why it's not appropriate here.
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Except that VMWare ESX, KVM, and MS Hyper-V are all in the same class as Xen (hypervisor-based virtualisation).