On 06/15/2010 10:10 PM, Jason Wang wrote:
Zachary Amsden wrote:
When CPUs with unstable TSCs enter deep C-state, TSC may stop
running. This causes us to require resynchronization. Since
we can't tell when this may potentially happen, we assume the
worst by forcing re-compensation for it at every point the VCPU
task is descheduled.
Is there any method to do the compensation on host TSC when recovering
from C-state? It should be simpler than do it on guest TSC.
Actually, yes, we could re-calibrate from HPET. Considering this patch
is already broken, maybe that's a better idea.
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