Re: [Linuxptp-users] Bug in LinuxPTP

[Aman S. <ama...@gm...>]

Hi Richard,

Can You please explain me Actually what this*  pi_offset_const *does.I am
not unable to get what you want to say.

Regards
Aman Sharma



On Thu, Jul 4, 2013 at 12:09 AM, Richard Cochran
<ric...@gm...>wrote:

> On Wed, Jul 03, 2013 at 05:46:04PM +0530, Aman Sharma wrote:
> >
> > When we start the PTP on both machine, for first time slave time syncs to
> > Master time.
> > But during runtime if we are changing time(manually changing System time)
> > of Master or Slave both are not syncing to each other.
>
> The master will not synchronize to the slave!
>
> Also, it does not make sense to change the time on the slave. That is
> the job of the ptp4l program.
>
> > We have to restart the PTP(i.e have to run command again) to make them
> sync
> > to each other.
> >
> > Please let us know the command or process, so that Master and Slave can
> > sync there time during run time
>
> As Jacob wrote, there is an option for jumping the clock.
> From the man page:
>
>   pi_offset_const
>          The maximum offset the PI controller will  correct  by  changing
>          the  clock  frequency instead of stepping the clock. When set to
>          0.0, the controller will never step the clock except  on  start.
>          The default is 0.0.
>
> If you set this to, say 1.0, then the slave will jump the clock
> whenever the offset exceeds one second.
>
> HTH,
> Richard
>