[LinuxPPS] Trouble shooting OnCore issues.

[Hal V. Engel]

On Thursday 05 June 2008 11:34:59 pm Hal V. Engel wrote:
snip
> When I start ntp with or without something holding the port open running I
> get the following in the log:
>
>  5 Jun 19:31:26 ntpd[22121]: configuration of 127.127.30.0 failed
>
> The message says that it is failing to start the oncore driver but it does
> not give any information about why it is failing.   I have no idea what to
> do next to get a handle on what may be happening.  Is there any way to get
> ntp to log more information about why the PPS configuration failed?   I
> probably have something missconfigured but how do I get enough information
> to find the source of the problem?  Are there other trouble shooting steps
> I should take at this point?
>

This morning I played around with /etc/ntp.oncore.0 and found that I had to 
remove the HARDPPS setting.  Ntp now starts without issues.  Is this a result 
of having the low level IRQ patches installed?

At this point it appears that I have things working and I am waiting to see 
how well ntp phase locks.  But here is what things look like now.

# ntpq -c lpeers                                               
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*GPS_ONCORE(0)   .GPS.            0 l   14   16  377    0.000    0.000   0.002
+enigma.wiredgoa 216.218.254.202  2 u   29   64  377   19.601    4.079   1.613
+clock-a.develoo 192.12.19.20     2 u    4   64  377   19.957    4.470   1.476
-mewmie.mainecoo 63.192.96.10     2 u   54   64  377   23.725   -0.532   3.959

This is what things looked like right after ntp was restarted:

# ntpq -c lpeers                                         
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*GPS_ONCORE(0)   .GPS.            0 l   12   16   37    0.000   -0.743 499.908
 enigma.wiredgoa 209.81.9.7       2 u   31   64    3   21.180   -1.292  15.885
 clock-a.develoo 209.81.9.7       2 u   29   64    3   25.165   -0.066   0.381
 mewmie.mainecoo 63.192.96.10     2 u   27   64    3   25.543    2.585   1.305

And this is what it looked like about 5 minutes later:

heng # ntpq -c lpeers                                               
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*GPS_ONCORE(0)   .GPS.            0 l    7   16  377    0.000   -0.205   0.089
+enigma.wiredgoa 209.81.9.7       2 u   55   64   77   20.224   -0.920   8.068
+clock-a.develoo 209.81.9.7       2 u   47   64   77   23.324   -0.345   6.644
-mewmie.mainecoo 63.192.96.10     2 u   50   64   77   23.141    1.341   7.762

Hal
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