[LinuxPPS] still the strangeness

[Udo van den Heuvel]

Bernhard Schiffner wrote:
> Am Dienstag, 19. Dezember 2006 16:04 schrieb Udo van den Heuvel:
>> Hello,
>>
>> Today I upgraded to ntp 4.2.2p4. No change in behaviour:
>>
> ...
>> Any comments? Any ideas?
>> Udo
> 
> Step by step:
> (general)
> 
> 1.) give me a uname -a for information please.

Linux epia 2.6.19.1 #2 PREEMPT Wed Dec 13 09:17:16 CET 2006 i686 i686
i386 GNU/Linux

This is vanilla kernel source with LinuxPPS patch and netdev random
patches which I have been using for a long time.

> 2.) comment out all peers in ntp.conf

done

> 
> 3.) put in _one_  you can really trust (for me it is ntp1.ptb.de) 

done (with this very server)


> 4. ) restart ntpd
>  (be aware that ntpd with 2.6.18+ kernels take up to 4 hours to become stable)

done.

> 5.) give me the ping-time to this peer for information please.

[root at epia etc]# ping ntp1.ptb.de
PING ptbtime1.ptb.de (192.53.103.108) 56(84) bytes of data.
64 bytes from ptbtime1.ptb.de (192.53.103.108): icmp_seq=1 ttl=50
time=30.6 ms
64 bytes from ptbtime1.ptb.de (192.53.103.108): icmp_seq=2 ttl=50
time=29.7 ms
64 bytes from ptbtime1.ptb.de (192.53.103.108): icmp_seq=3 ttl=50
time=30.0 ms
64 bytes from ptbtime1.ptb.de (192.53.103.108): icmp_seq=4 ttl=50
time=29.9 ms
64 bytes from ptbtime1.ptb.de (192.53.103.108): icmp_seq=5 ttl=50
time=30.0 ms
64 bytes from ptbtime1.ptb.de (192.53.103.108): icmp_seq=6 ttl=50
time=30.0 ms
64 bytes from ptbtime1.ptb.de (192.53.103.108): icmp_seq=7 ttl=50
time=53.3 ms


> 6.) report please what's on with your other peers with ntpdate -b -q x.y.z.a 
> && ntpq -c pe

[root at epia etc]# ntpdate -b -q ntp.xs4all.nl && ntpq -c pe
server 194.109.22.18, stratum 2, offset -0.000546, delay 0.03229
19 Dec 19:28:21 ntpdate[7479]: step time server 194.109.22.18 offset
-0.000546 sec
     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
*LOCAL(0)        .LOCL.          10 l    8   64  377    0.000    0.000
 0.001
xGPS_NMEA(0)     .GPS.            8 l    7   16  377    0.000  -173.62
 1.508
xptbtime1.ptb.de .PTB.            1 u  795 1024  377   29.703   -1.195
 1.337


> 
> -------------------
> (pps general)
> (still not as clocksource in ntp.conf)
> 
> 7.) read from your pps source (by minicom)

Works...  (strings and PPS)

> 8.) cat /proc/pps/0*/* to see the timing of assert and clear events

[root at epia etc]# cat /proc/pps/0*/*
0.000000000 #0
0.000000000 #0
0.000000000 #0
0.000000000 #0
0.000000000 #0
0.000000000 #0
0.000000000 #0
0.000000000 #0
[root at epia etc]# cat /proc/pps/0*/*
0.000000000 #0
0.000000000 #0
0.000000000 #0
0.000000000 #0
0.000000000 #0
0.000000000 #0
0.000000000 #0
0.000000000 #0

No changes there. No output.





This is the output so far...


Udo