[ntp:questions] Performance?
dhavey
dhavey at gmail.com
Tue Dec 23 20:20:53 UTC 2008
On Dec 22, 5:41 pm, hal-use... at ip-64-139-1-69.sjc.megapath.net (Hal
Murray) wrote:
> >I'm using Garmin LVC's. I used the windows config program on one of
> >them and changed the baud rate to 9600, turned the PPS on, and enabled
> >NEMA 3.x.
>
> The NMEA driver in ntpd is not expecting you to change the baud rate.
> There may be some way to configure it to use other baud rates, but I
> don't remember anything like that.
>
> >The other one I configured using cu. I turned off all of the output
> >sentences except for GPGG and turned the PPS on.
>
> The default setup for the NMEA driver is to use the GPRMC sentence.
> It can use a few others. Check the documentation or fix it to send
> (only) the GPRMC sentence.
>
> --
> These are my opinions, not necessarily my employer's. I hate spam.
The performance is still really bad:
remote refid st t when poll reach delay
offset jitter
==============================================================================
x192.168.0.2 69.25.96.13 2 u 1 16 377 0.130
4.307 0.417
192.168.0.26 192.168.0.2 2 u 47 16 210 0.000 0.000
130.357
192.168.0.27 .STEP. 16 u - 16 0 0.000
0.000 0.000
x192.168.0.29 .GPS. 1 u 11 16 376 0.086
-199.29 0.172
xGPS_NMEA(0) .GPS. 0 l 4 16 377 0.000
-220.73 2.039
remote refid st t when poll reach delay offset
jitter
==============================================================================
192.168.0.26 192.168.0.2 2 u 13 16 42 0.007
15.204 0.409
192.168.0.27 192.168.0.29 2 u 1214 16 0 0.001
40.722 0.000
192.168.0.28 71.80.83.0 3 u 2 16 377 0.018
199.327 0.123
*GPS_NMEA(0) .GPS. 0 l 3 16 377 0.000
0.605 3.320
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