On Thu, 2012-01-12 at 08:51 +0200, Michael S. Tsirkin wrote:

One othe rinteresting thing is that
in practice host often runs on the same CPU as guest.

That's surprising. On Power with our huge exit cost, I would think that
would hurt more than anything else.

This is the fastest way to run the host for when it
does not do a lot of work as most data is cached. And there amount of sharing
is less important than reducing cache consumption.

Again this is different from real hardware.

Yes indeed.

Cheers,
Ben.