[ntp:questions] Odd (mis)behavior when reference clock fails

Hal Murray hal-usenet at ip-64-139-1-69.sjc.megapath.net
Fri Sep 26 07:29:34 UTC 2008

>Does it really make sense to get microsecond resolution on the glitches.

I doubt if whatever the UPS is using for an A/D is good for microseconds.

I've thought of using a wall-wart and some dividers to feed an audio
input channel.  That would probably be good for 10s of microseconds.

I'm saving that for when I have lots of spare time.

>Try puttin in a microsleep into your routine to see if that solves the
>clock problem. It is possible that the reading of the ups is done via some
>sort of badly written interrupt routine which holds open the interrupts too
>long. It is however a bit weird I will admit.

I talk to the UPS over a serial port.  I suppose I could try
a USB to serial gizmo.

Another idea is to make an echo plug and some software that sends
stuff to itself and see what that does on various systems.

These are my opinions, not necessarily my employer's.  I hate spam.

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