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Re: [gpsd-dev] RaspbPi HOWTO
From: |
Gary E. Miller |
Subject: |
Re: [gpsd-dev] RaspbPi HOWTO |
Date: |
Thu, 5 May 2016 10:47:01 -0700 |
Yo All!
On Thu, 5 May 2016 10:39:40 -0700
"Gary E. Miller" <address@hidden> wrote:
> The NTP over the 100Base-T that goes in the USB High-Speed to the Pi,
> gets 0.3 milliSec of jitter.
>
> address@hidden:~# ntpq -p
> remote refid st t when poll reach delay
> offset jitter
> ==============================================================================
> +spidey.rellim.c .GPS1. 1 u 685 1024 377 0.282 0.417
Whoops that one was during a compile. Here is one for quiescent Pi2, really
0.3 milleSec:
address@hidden:/usr/local/src/GPS/gpsd/gpsd# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
+spidey.rellim.c .GPS1. 1 u 777 1024 377 0.282 0.417 0.302
*catbert.rellim. .SHM. 1 u 497 1024 377 0.329 1.168 0.707
+darth.inow.com 204.17.205.1 2 u 981 1024 377 0.582 0.723 0.448
It will jump to 0.500 with any load at all.
==============================================================================
+spidey.rellim.c .GPS1. 1 u 78 1024 377 0.260 0.928 0.590
Does ntp have a way to show the jitter bounds for a longer period of time?
Say average ovver an hour or a day?
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
address@hidden Tel:+1 541 382 8588
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- Re: [gpsd-dev] RaspbPi HOWTO, (continued)
- Re: [gpsd-dev] RaspbPi HOWTO, Eric S. Raymond, 2016/05/03
- Re: [gpsd-dev] RaspbPi HOWTO, Hal Murray, 2016/05/03
- Re: [gpsd-dev] RaspbPi HOWTO, Eric S. Raymond, 2016/05/03
- Re: [gpsd-dev] RaspbPi HOWTO, Hal Murray, 2016/05/04
- Re: [gpsd-dev] RaspbPi HOWTO, Fred Wright, 2016/05/04
- Re: [gpsd-dev] RaspbPi HOWTO, Gary E. Miller, 2016/05/04
- Re: [gpsd-dev] RaspbPi HOWTO, Frank, 2016/05/05
- Re: [gpsd-dev] RaspbPi HOWTO, Gary E. Miller, 2016/05/05
- Re: [gpsd-dev] RaspbPi HOWTO, Gary E. Miller, 2016/05/05
- Re: [gpsd-dev] RaspbPi HOWTO,
Gary E. Miller <=
- Re: [gpsd-dev] RaspbPi HOWTO, Frank Nicholas, 2016/05/03
- Re: [gpsd-dev] RaspbPi HOWTO, Dan Poirot, 2016/05/04
Re: [gpsd-dev] RaspbPi HOWTO, Clark B. Wierda, 2016/05/03