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> Nested virtualisation [...] challenging to emulate the underlying interfaces with flawless fidelity [...] dreadful performance It is so sad that we've ended
by tonyg 2y ago
> Nested virtualisation [...] challenging to emulate the underlying interfaces with flawless fidelity [...] dreadful performance
It is so sad that we've ended up with designs where this is the case. There is no intrinsic reason why nested virtualization should be hard to implement or should perform poorly. Path dependence strikes again.
- bonzini 2y agoIt doesn't perform poorly in fact. It can be tuned at 90% of non-nested virtualization, and for workloads where it doesn't, that's more than anything else a testimony to how close virtualized performance is to bare-metal. That said, it does add a lot of complexity.