* [Thumbgps-devel] decoding ntp... does anyone really know what time it is?
@ 2013-07-22 23:30 Dave Taht
2013-07-23 0:58 ` Gary E. Miller
0 siblings, 1 reply; 4+ messages in thread
From: Dave Taht @ 2013-07-22 23:30 UTC (permalink / raw)
To: thumbgps-devel
I should probably get back on the timenuts list but perhaps someone
here can explain this:
http://www.eecis.udel.edu/~mills/ntp/html/decode.html
So I have a pps configuration of the gpsd configured. Or thought I
did. Actually, in this case, gpsd had failed to start on beagle-1 for
some reason, ntpd started without it, and I started it after ntpd.
I'm still waiting for ntp to pick it up, so far, which I talk to
below. I'm just curious as to how viable tickers evolve over time....
Anyway, a - means it's discarded from the cluster algorithm. Beagle-1
is my gps served ntp server
on a remote client:
ntpq> peer
remote refid st t when poll reach delay offset jitter
==============================================================================
-beagle-1 199.102.46.72 2 u 984 1024 377 0.779 -23.343 3.593
*pool-test.ntp.o 127.67.113.92 2 u 937 1024 357 35.216 -4.543 5.157
-d7.hotfile.com 220.183.68.66 2 u 726 1024 377 81.001 -8.452 4.082
-ntp.westbrook.c 120.119.68.211 3 u 830 1024 375 29.350 -11.324 13.744
+208.79.16.124 198.60.22.240 2 u 797 1024 377 123.573 -10.639 12.673
+golem.canonical 193.79.237.14 2 u 83 1024 377 161.633 2.891 8.818
on beagle-1 (after I restarted gpsd)
ntpq -n -p
remote refid st t when poll reach delay offset jitter
==============================================================================
127.127.28.0 .GPS. 0 l 21 16 76 0.000 302.125 0.858
127.127.28.1 .GPS1. 0 l - 16 0 0.000 0.000 0.000
+69.50.219.51 209.51.161.238 2 u 446 512 173 78.353 4.241 15.379
-216.229.0.49 216.229.0.179 2 u 876 512 376 157.278 -14.828 4.858
+2001:4f8:fff7:1 66.220.9.122 2 u 237 512 377 24.358 16.313 7.613
*199.102.46.72 .GPS. 1 u 457 512 333 155.082 0.735 9.664
My assumption is that after a suitable period, the client box will
grok that the beagle-1 box is stratum 1 and move over to it, or are
their other heuristics involved?
After a while, the above became marked with an X (and I think pps
didn't kick in)
root@beagle-1:/var/spool# ntpq -n -p
remote refid st t when poll reach delay offset jitter
==============================================================================
x127.127.28.0 .GPS. 0 l 123 16 200 0.000 302.125 0.972
127.127.28.1 .GPS1. 0 l - 16 0 0.000 0.000 0.000
+69.50.219.51 209.51.161.238 2 u 20 512 367 75.973 2.586 14.346
+216.229.0.49 216.229.0.179 2 u 978 512 376 157.278 -14.828 4.858
-2001:4f8:fff7:1 66.220.9.122 2 u 339 512 377 24.358 16.313 7.613
*199.102.46.72 .GPS. 1 u 20 512 267 140.874 -11.207 6.531
which is "discarded by intersection algorithmn"
Does
--
Dave Täht
Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [Thumbgps-devel] decoding ntp... does anyone really know what time it is?
2013-07-22 23:30 [Thumbgps-devel] decoding ntp... does anyone really know what time it is? Dave Taht
@ 2013-07-23 0:58 ` Gary E. Miller
2013-07-23 1:01 ` Dave Taht
0 siblings, 1 reply; 4+ messages in thread
From: Gary E. Miller @ 2013-07-23 0:58 UTC (permalink / raw)
To: Dave Taht; +Cc: thumbgps-devel
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Yo Dave!
On Mon, 22 Jul 2013 16:30:26 -0700
Dave Taht <dave.taht@gmail.com> wrote:
> After a while, the above became marked with an X (and I think pps
> didn't kick in)
>
> root@beagle-1:/var/spool# ntpq -n -p
> remote refid st t when poll reach delay
> offset jitter
> ==============================================================================
> x127.127.28.0 .GPS. 0 l 123 16 200 0.000 302.125 0.972
> 127.127.28.1 .GPS1. 0 l - 16 0 0.000 0.000 0.000
Yeah, reach zero means you are not seeing the PPS. The priveledge separation
got broken a while back in gpsd. You might have to run gpsd as
root in the foreground for PPS.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
gem@rellim.com Tel:+1(541)382-8588
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [Thumbgps-devel] decoding ntp... does anyone really know what time it is?
2013-07-23 0:58 ` Gary E. Miller
@ 2013-07-23 1:01 ` Dave Taht
2013-07-23 1:11 ` Gary E. Miller
0 siblings, 1 reply; 4+ messages in thread
From: Dave Taht @ 2013-07-23 1:01 UTC (permalink / raw)
To: Gary E. Miller; +Cc: thumbgps-devel
I ran it with the -n option and restarted ntp and it worked. So it
looks like the beagle kernel has the pps stuff after all.
root@beagle-1:/var/spool# ntpq -n -pn
remote refid st t when poll reach delay offset jitter
==============================================================================
x127.127.28.0 .GPS. 0 l - 16 377 0.000 283.988 1.878
*127.127.28.1 .GPS1. 0 l 15 16 377 0.000 -1.045 3.570
-206.253.165.93 216.45.49.100 3 u 21 64 7 34.315 2.912 11.894
+97.107.129.217 129.6.15.29 2 u 24 64 7 89.570 -4.246 5.943
+2001:470:1:24f: 204.123.2.72 2 u 88 64 6 24.392 -6.482 3.163
-50.23.135.154 173.13.85.5 2 u 20 64 7 46.942 4.639 9.237
On Mon, Jul 22, 2013 at 5:58 PM, Gary E. Miller <gem@rellim.com> wrote:
> Yo Dave!
>
> On Mon, 22 Jul 2013 16:30:26 -0700
> Dave Taht <dave.taht@gmail.com> wrote:
>
>> After a while, the above became marked with an X (and I think pps
>> didn't kick in)
>>
>> root@beagle-1:/var/spool# ntpq -n -p
>> remote refid st t when poll reach delay
>> offset jitter
>> ==============================================================================
>> x127.127.28.0 .GPS. 0 l 123 16 200 0.000 302.125 0.972
>> 127.127.28.1 .GPS1. 0 l - 16 0 0.000 0.000 0.000
>
> Yeah, reach zero means you are not seeing the PPS. The priveledge separation
> got broken a while back in gpsd. You might have to run gpsd as
> root in the foreground for PPS.
>
> RGDS
> GARY
> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
> gem@rellim.com Tel:+1(541)382-8588
--
Dave Täht
Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html
^ permalink raw reply [flat|nested] 4+ messages in thread
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2013-07-22 23:30 [Thumbgps-devel] decoding ntp... does anyone really know what time it is? Dave Taht
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2013-07-23 1:01 ` Dave Taht
2013-07-23 1:11 ` Gary E. Miller
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