Messages in this thread | | | Date | Thu, 17 Aug 2006 12:32:37 +0200 (CEST) | From | Roman Zippel <> | Subject | Re: [NTP 0/9] NTP patches |
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Hi,
On Wed, 16 Aug 2006, john stultz wrote:
> How much real-world testing have you done with these patches? I've been > running w/ this set of patches for a few days and I've been noticing my > system is having difficulties synching up w/ the NTP server.
I tested it on a few machines of course.
> I haven't been logging anything, so its currently uncertain data, but > normally I've seen NTP sync the time within 1-2ms in just an hour or so, > however since this morning (~6 hours ago) I'm seeing it still 10ms off. > > I'm going to let it run for the rest of the day then try to bisect the > patches to see where things went wrong. I'll let you know as soon as I > find anything.
I would need the loopstats over a few days to really say something about this. It may also depend on the stability of your remote NTP serer. The new code adjusts a little a slower, but should be overall a little more stable. The ntpd does basically "if (!pll_nano) ntv.constant = sys_poll - 4;" to adjust for the difference in behaviour of the two models, but this causes rather fast adjustments. In the NTP4 patch I undo this adjustment for the new model.
> I'm going to let it run for the rest of the day then try to bisect the > patches to see where things went wrong. I'll let you know as soon as I > find anything.
Well, upto the NTP4 patch the behaviour should be mostly unchanged.
bye, Roman - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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