[ntp:questions] consistent negative offset with Garmin GPS 18x LVCand FreeBSD

Kenyon Ralph kenyon at kenyonralph.com
Sun Mar 25 21:33:12 UTC 2012


On 2012-03-25T21:02:35+0000, unruh <unruh at invalid.ca> wrote:
> On 2012-03-25, Kenyon Ralph <kenyon at kenyonralph.com> wrote:
> >
> > On 2012-03-25T17:10:59+0100, David J Taylor <david-taylor at blueyonder.co.uk.=
> > invalid> wrote:
> >> "Kenyon Ralph" <kenyon at kenyonralph.com> wrote in message
> >> news:20120324223442.GD26910 at kenyonralph.com...
> >>=20
> >> [text was an attachment....]
> >>=20
> >> Please give details of your Internet connection.  I wonder about
> >> asymmetrical trip delays.
> >
> > That's a point that I had not considered. This server is on a cable
> > Internet connection with about 10 Mb/s down and 1 Mb/s up. Fairly
> > asymmetrical.
> >
> > --=20
> > Kenyon Ralph
> >
> 
> That should not make millisec worth of difference, unless that 1MB up is
> really really overfull all the time. 

Right, it's not heavily loaded. And, my other systems on the same
network have normal-looking PLL offset graphs, centered around zero:
http://kenyonralph.com/munin/kenyonralph.com/voodoo.kenyonralph.com/ntp_kernel_pll_off.html
http://kenyonralph.com/munin/kenyonralph.com/grunt.kenyonralph.com/ntp_kernel_pll_off.html

-- 
Kenyon Ralph
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