[ntp:questions] SNTP with 1ms of precision?
rick.jones2 at hp.com
Thu Jun 17 21:44:56 UTC 2010
David Woolley <david at ex.djwhome.demon.invalid> wrote:
> SNTP as used on Windows to access the Microsoft timeserver certainly
> can't. Anything that runs on Windows that sets the clock on ever
> poll almost certainly can't for any reasonable application load. On
> Linux you have to beware of interrupt latency, NIC interrupt
I suspect there are interrupt aggregations on more than just Linux. I
would expect every *nix and even Windows to have interrupt
aggregation/coalescing. I would expect it to delay notification to
the host that the packet has arrived by anywhere between 5 and 20
microseconds, but that is an off-the-cuff estimate.
Process shall set you free from the need for rational thought.
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...
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