[LinuxPPS] ntptime error

[Udo van den Heuvel]

Hello,

One of my workstations which only has DCF and network sync shows:

# ntpq -pn
     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
+127.127.8.0     .DCFa.           0 l   15   16  377    0.000   12.937
 0.604
*192.168.10.98   .GPS.            1 u  171  256  377    0.159    2.541
 0.200
+fd00:c0a8:a00:1 .GPS.            1 u  115  256  377    0.434    2.744
 0.191

But also:

# ntptime
ntp_gettime() returns code 5 (ERROR)
  time d2e87df9.24fd2000  Fri, Feb 17 2012  8:19:21.144, (.144487),
  maximum error 16000000 us, estimated error 16 us, TAI offset 0
ntp_adjtime() returns code 5 (ERROR)
  modes 0x0 (),
  offset 0.000 us, frequency 0.000 ppm, interval 1 s,
  maximum error 16000000 us, estimated error 16 us,
  status 0x4041 (PLL,UNSYNC,MODE),
  time constant 7, precision 1.000 us, tolerance 500 ppm,

The box is running Fedora ntp-4.2.6p4-1.fc16.x86_64  and kernel.org
3.2.4. DCF is set up with these udev rules:

KERNEL=="ttyS1", SYMLINK+="refclock-0"
KERNEL=="ttyS1", RUN+="/bin/setserial -v /dev/%k low_latency irq 20"

What is wrong?
Why does ntptime report errors?
How do I find out?

Same for my firewall box that thas the gps attached:

# ntpq -pn
     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
o127.127.20.0    .GPS.            0 l   12   16  377    0.000   -0.098
 0.002
+194.109.22.18   193.79.237.14    2 u   26   64  377   16.880   -3.366
13.723
+194.109.20.18   193.67.79.202    2 u    9   64  377   16.385   -1.810
 7.946
+193.67.79.202   .PPS.            1 u    8   64  277   18.266   -2.908
14.135
+193.79.237.14   .PPS.            1 u   63   64  367   20.209   -2.769
10.023
+80.101.105.103  .GPS.            1 u   63   64  377   98.313  -10.115
49.066
*134.221.205.12  .PPS.            1 u   32   64  367   18.903   -2.732
 6.240

Looks fairly normal, but also:

# ntptime
ntp_gettime() returns code 5 (ERROR)
  time d2e87fc9.b42b5000  Fri, Feb 17 2012  8:27:05.703, (.703786),
  maximum error 16000000 us, estimated error 16 us, TAI offset 0
ntp_adjtime() returns code 5 (ERROR)
  modes 0x0 (),
  offset 0.000 us, frequency 0.000 ppm, interval 1 s,
  maximum error 16000000 us, estimated error 16 us,
  status 0x41 (PLL,UNSYNC),
  time constant 7, precision 1.000 us, tolerance 500 ppm,

What is wrong?

Kind regards,
Udo