vmexit cycle cost

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Hi all,

just a quick question: using the kvm-unittest vmexit test, it seems
using a VMCALL for exit, a round-trip to the host takes roughly 1000
cycles on a modern processor. This number sounds quite low to me. Can
anyone verify if it's reasonable or have more data on this number has
developed over time given newer processors?

Thanks,
-Christoffer
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