[ntp:questions] ntp performance

Maarten Wiltink maarten at kittensandcats.net
Tue Jun 12 11:53:26 UTC 2007


<christian.pinedo.zamalloa at gmail.com> wrote in message
news:1181637439.758438.131310 at j4g2000prf.googlegroups.com...
[...]
> every day at the same time, between 0 and 10000 UTC seconds normally
> at 3.00 am local time, there is a great peak of the offset. Oddly at
> this time FreeBSD runs daily periodic tasks using cron and periodic
> applications. My question is if a high CPU usage could produce a
> variation of the offset in a FreeBSD machine.

Not actually CPU usage but disk usage. Are they configured for DMA?
PIO mode can notoriously result in lost (timer) interrupts during
peak activity.

Groetjes,
Maarten Wiltink





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