[ntp:questions] Peer Review of ntpq -c rv
David Lord
snews at lordynet.org
Wed Mar 7 16:59:31 UTC 2012
Alby VA wrote:
> On Mar 7, 10:59 am, David Lord <sn... at lordynet.org> wrote:
>> Alby VA wrote:
>>> I'm looking to get a little feedback on if the following output of my
>>> Sure GPS / FreeBSD
>>> setup looks like its running smoothly and keeping time correctly.
>>> assID=0 status=0115 leap_none, sync_atomic, 1 event,
>>> event_clock_reset,
>>> version="ntpd 4.2.... at 1.2349-o Mon Feb 20 22:00:33 UTC 2012 (1)",
>>> processor="amd64", system="FreeBSD/9.0-RELEASE", leap=00, stratum=1,
>>> precision=-19, rootdelay=0.000, rootdisp=0.269, refid=PPS,
>>> reftime=d301d22f.dc1393c2 Wed, Mar 7 2012 7:25:19.859,
>>> clock=d301d230.cc08bad9 Wed, Mar 7 2012 7:25:20.797, peer=41909,
>>> tc=4, mintc=3, offset=-0.034, frequency=-25.214, sys_jitter=0.002,
>>> clk_jitter=0.002, clk_wander=0.001
>>> Here are my website graphs/stats I've been keeping since day 1.
>>> NTP Clock Offset:http://godzilla.empire.org:9999/
>>> NTP Offset from UTC:http://godzilla.empire.org:9999/godzilla_ntp-b.html
>> Could you also post output from ntpq -p
>>
>> I don't have a pc with recent FreeBSD but the desktop
>> I updated to NetBSD-6 only 2 hours ago gives:
>>
>> remote refid st t poll reach delay offset jitter
>> +ntp1.lordynet.org 81.187.61.74 2 u 512 377 0.450 -4.961 3.024
>> *ntp0.lordynet.org.uk .MSFa. 1 u 512 377 0.642 -0.828 4.785
>> +<local pc> .PPSb. 1 u 512 377 1.572 -1.935 3.187
>> -<local pc2> 81.187.61.74 2 u 512 377 1.553 -6.075 3.892
>>
>> Does the Sure have a PPS output you can use?
>>
>> <Local pc> is using a Sure with PPS
>> # ntpq -c rv -p me6000
>> associd=0 status=0119 leap_none, sync_pps, 1 event, leap_armed,
>> version="ntpd 4.2.6p5....",
>> processor="i386", system="NetBSD/5.1_STABLE",
>> .....
>> offset=-0.001 sys_jitter=0.004
>>
>> David
>
>
>
>
> Here is my ntpq -p output:
>
>
> [alby at godzilla.empire.org(tcsh):6] ntpq -p
> remote refid st t when poll reach delay
> offset jitter
> ==============================================================================
> -ntp.alaska.edu .GPS. 1 u 133 128 377 120.428
> -2.464 0.371
> +utcnist2.colora .ACTS. 1 u 53 128 377 66.362
> -4.215 0.429
> -time-a.nist.gov .ACTS. 1 u 670 128 240 16.473
> 2.627 17.066
> +tick.usask.ca .GPS. 1 u 110 128 377 104.848
> -3.473 1.482
> -cronos.cenam.mx .GPS. 1 u 49 128 377 100.163
> 10.784 27.096
> oPPS(0) .PPS. 0 l 6 16 377 0.000
> -0.018 0.002
> *GPS_NMEA(0) .GPSb. 0 l 9 16 377 0.000
> -36.164 18.050
> [alby at godzilla.empire.org(tcsh):7]
>
Sorry I misread your message and had in my mind that you
were getting msec offsets rather than usec. I canceled my
reply after posting.
The offsets still look to be high for what can be achieved
from pps but are not reflected in the jitter.
David
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