[ntp:questions] Peer Review of ntpq -c rv
Alby VA
albyva at empire.org
Wed Mar 7 18:28:16 UTC 2012
On Mar 7, 11:59 am, David Lord <sn... at lordynet.org> wrote:
> 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:
>
> > [a... 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
> > [a... 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
Does this mean there is something I need to tweek to get
my offsets lower? Could the delays from the remote NTP
servers be my issue?
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