[Voyage-linux] Re: Voyage 0.5.2 time sync issue

[Leigh Orf]

I too used adjtimex to get the clock to behave much better, and run ntpd on
top of that and it keeps things in check. A munin plot of my time statistics
for an alix2d3 board is attached (assuming this list allows attachmennts!).
The trick is to get your clock to behave within the parameters that ntpd
accepts first.

Leigh



On Wed, Apr 1, 2009 at 5:46 PM, Alexander Krsek <merlin at gremlin.cz> wrote:

> Stéphane Acounis <stephane.acounis at ...> writes:
>
> >
> > Le Tue, 31 Mar 2009 21:21:25 -0500
> > Sam <voyage at ...> a écrit:
> >
> > > I don't know what hardware you are using but ntp won't work on the
> > > alix boards as their time skew is beyond the limits allowed in ntp.
> > > Just running ntpdate with cron every hour or so usually works better
> > > (if hardware is the issue).
> > >
> > > Sam
> >
> > Hi,
> >
> > I'm using Voyage 0.5.2 on an Alix3c2 board.
> >
> > ntpq -p
> >      remote           refid      st t when poll reach   delay   offset
> >      jitter
> >
>
> ==============================================================================
> >      LOCAL(0)        .LOCL.          10 l   57   64  377    0.000
> >      0.000   0.015 *192.168.0.1     134.158.24.1     7 u   30   64
> >      377    0.262    0.049   0.194
> >
> > uptime:
> > 09:54:02 up 6 days, 17:17,  2 users,  load average: 0.00, 0.01, 0.00
> >
> > The NTP server is broadcasting time he has received from the network.
> >
> > So ntp is working on Alix boards.
> >
>
> It depends.
>
> I had same problem with voyage 0.6.1 (distribution kernel 2.6.26) on Alix
> 2D3
> board. Time skew was like one second less every 20 seconds.
>
> I solved it with adjtimex package, which quite fixed constant time skew and
> then run ntpd on top of that.
>
> Interesting is, that with (self configured/compiled) 2.6.27 kernel there is
> no
> such issue. Also some time ago, voyage 0.5.2 (with distribution kernel) did
> not
> have any such problem with ntpd on that board.
>
> So yes, ntp is working on Alix boards. And most of time without any other
> help ;)
>
>
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>


-- 
Leigh Orf
Assistant Professor of Atmospheric Science
Room 130G Engineering and Technology
Department of Geology
Central Michigan University
Mount Pleasant, MI 48859
(989)774-1923
Amateur radio callsign: KG4ULP
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