On Sat, Jun 6, 2015 at 6:45 PM, Doug Ledford <dledf...@redhat.com> wrote:

>>> So no, I disagree that rough is fine for anything.

>> I am sorry but the practical issues that we are dealing with in
>> timekeeping today shows just the opposite. For a true comparison of clocks
>> with nanosecond accuracy you would need time corrected values and that is
>> a challenge due to the variances of the clocks that we see.

> Jason's point, and one that isn't addressed yet, is that this might not
> be variance in the clocks and instead might be a design flaw in the API
> you are using and the way the clock speeds are passed to user space.
> Changing from int MHz to int KHz might solve your problem.

OK, so if we have the UAPI to pass the clock frequency in KHz that
would put us in a better place? seems very much doable.

Or.
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