Re: Mcsec in Timestamp, is it possible

From: <bmorris@ca.ibm.com>
> That site provides a way to get a timestamp that's unique, but it
> doesn't promise that the microseconds will be valid, just that
> they'll be different from the previous value obtained.
> 
> As far as I know, there's no way to get an accurate microseconds
> measurement.

The 8-microsecond resolution actually gives you a fairly accurate 
number.

I tested it against what the MFTB instruction gives and on my 150
there was a very nice linear relationship between the value returned
at the MI and the timebase count (which is accurate), with 49.53
ticks to each microsecond.  (probably meaning that the 150 is
a 49.53 MHz machine). Just too bad that the resolution has been
downgraded by a factor or 200. Why not simply return the full
resolution the machine is capable of? If the result is not unique
(as tested against the previous value) just do it again.




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