https://bugzilla.redhat.com/show_bug.cgi?id=1296750
--- Comment #12 from Mark Goodwin <mgoodwin@xxxxxxxxxx> ---
(In reply to Frank Ch. Eigler from comment #11)
> > Both pmval and pmdumptext check for counters going backward (and more
> > recently
> > pmiostat does too) and report '?', but pmrep just faithfully reports a
> > negative rate.
>
> Negative rates are an orthogonal issue. If cross-<mark>-interpolated
> counter values happened to be larger than before, you'd see a positive
> rate, but it would be a false positive. The correct answer would
> still be "no answer".
yes I know - negative rates are symptomatic of when the correct answer
should have been no answer. The most common symptom is a counter going
backwards (and not due to a wrap).
Cheers
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