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bbfa235
(Get the code!)
Just to be sure, I repeated it, with the same result. I have the impression that it might be the time spent between a vmentry and a vmexit that matters in the CPU performance of the guest. I am no expert though.
This is what I am seeing in the graphs:
vmentry----interval A(s)---
"interval A" seems to be constant, whereas "interval B" seems to be shorter in the VM without spec-ctrl. This would mean that the CPU performs a vmentry much quicker than in the VM with spec-ctrl enabled. I cannot see why though.
I uploaded the traces here:
https:/