[Voyage-linux] ntp drift with voyage linux 0.6

[Kim-man 'Punky' TSE]

Hi Michael,

Perhaps this thread can help:
http://www.mail-archive.com/voyage-linux@list.voyage.hk/msg02834.html

Regards,
Punky

Michael Cohen wrote:
> Hi List,
>   I have an alix3 soekris board computer (geod based) which was
> running great on Voyage 0.5 with stable NTP time. I have reinstalled
> on a new flash card the latest 0.6 version but i found that the clock
> now drifts very quickly. With kernel 2.6.26 the clock drift is extreme
> (about 1 minute every hour). If the drift was smaller I might have
> been able to correct it with cronning an ntpdate-debian every 10
> minutes but this is not going to be sufficient for that kind of drift
> level.
>
> None of the 2.6.26 kernels seem to work - time was drifting very
> quickly and ntp didnt seem to be setting it at all. I then installed
> the 2.6.23 kernel back from 0.5:
>
> Router1:~# cat /proc/version
> Linux version 2.6.23-486-voyage (2.6.23-2) (root at punknix-uml) (gcc
> version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 PREEMPT Wed
> May 21 15:31:49 GMT 2008
>
> I tested it with ntpq -p
>
> Router1:~# ntpq -p
>      remote           refid      st t when poll reach   delay   offset  jitter
> ==============================================================================
>  ip-72-167-54-20 204.123.2.72     2 u    1   64  377  184.097  125399. 3853.51
>  ns1.your-site.c 198.82.1.203     3 u   20   64  377  243.286  125138. 3938.68
>  point1.adamants 128.138.140.44   2 u   16   64  377  218.464  125207. 3929.94
>  huggy.petdance. 208.100.0.38     3 u   26   64  377  249.463  125053. 3889.21
>
> Which showed it was way off (probably after a couple of hours or
> running). I then checked the kernel was using the right clocksource:
>
> Router1:~# cat /sys/devices/system/clocksource/clocksource0/*
> pit jiffies tsc
> pit
>
> I checked the drift file thats written by ntpd
> Router1:~# cat /var/lib/ntp/ntp.drift
> 0.000
>
> which seems to me that ntp has given up on correcting this board.
>
> I am currently at my wits end - i have no idea why it works fine in
> 0.5 but does not work in 0.6. Im also surprised that noone seem to
> report this as a bug since it shows this bug with all the 0.6 kernels
> (2.6.26-486-voyage and 2.6.26-2-686 and even the old
> 2.6.23-486-voyage) with a straight install (there is nothing really
> special about this installation). There is definitely nothing wrong
> with the hardward - if I put the old 0.5 card back in it works fine.
>
> Can anyone please shed some light on the matter or at least provide
> some pointers for further investigation? I really need to get the 0.6
> working since I need the latest openvpn version. I dont mind if I need
> to run an old kernel on a 0.6 distro but even this doesnt seem to
> work. Maybe there is a bug with the new ntpd?
>
> Thanks in advance
> Michael.
>
> _______________________________________________
> Voyage-linux mailing list
> Voyage-linux at list.voyage.hk
> http://list.voyage.hk/mailman/listinfo/voyage-linux
>   


-- 
Regards,
Punky

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