[LinuxPPS] ntpd synchronization issues

[Felix Joussein]

  Hi Udo,
What kernel version?

Current Stable (2.6.34)

What ntpd version?

The source, which is shipped with Ubuntu 10.04 which is 4.2.4p6.
I build the source using: --enable-all-clocks --enable-ATOM 
--enable-parse-clocks --enable-accurate-adjtime --with-crypto

What refclock?

here's my ntp.conf:

# refclocks
server 217.19.37.20 iburst minpoll 4 maxpoll 4 prefer
server 217.19.37.26 iburst minpoll 4 maxpoll 4 prefer
server 217.19.37.27 iburst minpoll 4 maxpoll 4 prefer

# PPS0
server 127.127.22.0 iburst minpoll 4 maxpoll 4 prefer
fudge  127.127.22.0 stratum 0 refid ATOM flag3 1

# PPS1
server 127.127.22.1 iburst minpoll 4 maxpoll 4 prefer
fudge  127.127.22.1 stratum 0 refid ATOM flag3 1

driftfile /var/lib/ntp/ntp.drift
keysdir /etc/ntp
crypto randfile /var/lib/ntp/.rnd
crypto pw leapsecreet


Any patches for kernel or ntpd?

Kernel: No
ntpd: probably the Ubuntu patches


But: I have had the same problem over the last year with kernel versions 
prior to 2.6.34 and ntpd source from ntpd.org
So far I used this hardware:  Intel Atom N330, N270, N510, IC2, AMD X2, 
AMD Geode, VIA Eden

regards,

Felix



>> So my question is rather simple: Do you also have this problem?
> No... I did not measure time to get down to 0.00xxx but it is quick enough.
>
>> Which distribution did you use?
> Fedora. But I compile ntpd and kernel.org myself.
>
>> Which hardware is the best?
> What demands do you have for the precision?
>
> Udo
>
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