Re: [PATCH 2/11] Sched clock paravirt op
From: Jeremy Fitzhardinge
Date: Tue Feb 06 2007 - 18:23:37 EST
Zachary Amsden wrote:
> Scheduled (or available) time and real time are good notions. Stolen
> time is debatable. But TSC is basically just always wrong. That's
> why I don't want to overload the rdtsc operation.
Well, in the Xen case it is actually guaranteed to be correct and useful
as real time, but that's definitely not something we can expect in
general. But you're talking specifically about schedulable vcpu time
here, right?
J
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