Anthony Liguori wrote:
With the default options, my idle winxp guest causes about 550 wakeups/sec which is pretty close to what I'd expect. I don't think you'll get much better than that without using a dynticks guest.
We keep various timers firing even if the irq lines they are tied into are masked. This generates extra interrupts, and in the case of busy guests, extra exits (though the cost is relatively low in that case).
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