On 06/16/2010 03:24 AM, Glauber Costa wrote:
On Mon, Jun 14, 2010 at 09:34:06PM -1000, 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.
can't we just compensate everytime check_tsc_unstable() is true?
We should probably not rely on check_tsc_unstable, we should do this
only if we don't have NONSTOP_TSC.
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