[ntp:questions] Leap second bug?

Unruh unruh-spam at physics.ubc.ca
Sat Jan 5 23:46:23 UTC 2008


david at ex.djwhome.demon.co.uk.invalid (David Woolley) writes:

>In article <9yVej.43847$UZ4.31290 at edtnps89>,
>Unruh <unruh-spam at physics.ubc.ca> wrote:

>> and the time required to timestamp that packet is about another 2usec, with
>> fluctuations depending on whether other interrupts are being serviced.

>On both Linux and Windows, interrupt latencies of more than 4ms and
>even more than 10ms are quite common.  The interrupt processing time

I hope you mean 4 or 10usec, not msec.


>from the idle loop is not a good indication of the timing on a system
>doing real work.  (The above figures are based on clock interrupts 
>overrunning at 250 Hz and 100 Hz clock frequencies, typically when doing
>IDE disk I/O.)

Although you might not have. 
The figures I got were on an active machine, although often not used that
much.






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