I would like to know the accuracy of time synchronization ?
And the difference between path delay and master offset ?
the value of master offset is the accuracy value ?
Regards,
Hardik A Gohil
On Fri, Jan 13, 2017 at 11:23 AM, Dale Smith <dsm...@users.sourceforge.net>
wrote:
> Offset and Delay are in nanoseconds. The Frequency is (I'm pretty
> sure) in parts-per billion.
>
> -Dale
>
> On Thu, Jan 12, 2017 at 8:40 PM, Hardik Gohil <hardikgohil1...@gmail.com>
> wrote:
> > Hello,
> >
> > I am working on Linux 3.12 running on TI AM335x.
> >
> > The Test system is GPS connected to CPU over Ethernet and GPS is
> configured
> > to End to End protocol.
> >
> > following are the messages
> > --------------------------------------
> > ptp4l[71468.231]: master offset -230 s2 freq -23449 path delay
> > 15359
> > ptp4l[71469.232]: master offset -185 s2 freq -23473 path delay
> > 15372
> > ptp4l[71470.233]: master offset 90 s2 freq -23254 path delay
> > 15503
> > ptp4l[71471.234]: master offset -321 s2 freq -23638 path delay
> > 15500
> > ptp4l[71472.234]: master offset 152 s2 freq -23261 path delay
> > 15500
> > ptp4l[71473.235]: master offset 279 s2 freq -23088 path delay
> > 15500
> > ptp4l[71474.237]: master offset -343 s2 freq -23627 path delay
> > 15500
> > ptp4l[71475.242]: master offset 77 s2 freq -23310 path delay
> > 15500
> > ptp4l[71476.242]: master offset 51 s2 freq -23313 path delay
> > 15500
> > ptp4l[71477.242]: master offset 29 s2 freq -23319 path delay
> > 15500
> > -----------------------------------------
> > phc2sys[71501.627]: sys offset -75 s2 freq -23336 delay 3480
> > phc2sys[71502.628]: sys offset 37 s2 freq -23246 delay 3521
> > phc2sys[71503.629]: sys offset 229 s2 freq -23043 delay 3480
> > phc2sys[71504.630]: sys offset -3 s2 freq -23207 delay 3560
> > phc2sys[71505.631]: sys offset -203 s2 freq -23408 delay 3520
> > phc2sys[71506.631]: sys offset -340 s2 freq -23605 delay 3440
> > phc2sys[71507.632]: sys offset -233 s2 freq -23600 delay 3560
> > phc2sys[71508.633]: sys offset -8 s2 freq -23445 delay 3480
> > phc2sys[71509.634]: sys offset 234 s2 freq -23206 delay 3521
> > phc2sys[71510.634]: sys offset 235 s2 freq -23135 delay 3560
> > phc2sys[71511.635]: sys offset 162 s2 freq -23137 delay 3520
> > phc2sys[71512.636]: sys offset 37 s2 freq -23213 delay 3520
> > phc2sys[71513.637]: sys offset -252 s2 freq -23491 delay 3560
> > phc2sys[71514.638]: sys offset -89 s2 freq -23404 delay 3560
> > phc2sys[71515.639]: sys offset 269 s2 freq -23073 delay 3480
> > ----------------------------------------------
> >
> > I am trying to understand this messages.
> >
> > how do I know whether system time is synced to GPS and what is accuracy
> ??
> >
> >
> >
> >
> > Regards,
> > Hardik A Gohil
> >
> > ------------------------------------------------------------
> ------------------
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