lkml.org 
[lkml]   [2006]   [Aug]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [NTP 0/9] NTP patches
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/

\
 
 \ /
  Last update: 2006-08-17 12:41    [W:0.114 / U:0.756 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site