Re: [Linuxptp-users] ptp4l and multiple network devices

[Vadim B. <va...@gm...>]

It appears that it was finding another master clock through the wireless
interface. After I disabled it, it looks better:
ptp4l[805.793]: master offset        161 s2 freq   +4647 path delay
16058

Thank for the help!

On Fri, Aug 4, 2017 at 11:37 AM, Keller, Jacob E <jac...@in...>
wrote:

> How many devices are you running ptp4l on? 2? 3? If only 2, it seems like
> you have an extra instance of ptp4l on the network somehow,
>
>
>
> ptp4l[1186.939]: port 2: new foreign master 003053.fffe.20597e-1
> ptp4l[1187.460]: port 1: new foreign master 003053.fffe.20597f-1
>
>
>
> Not really sure what that is about.
>
>
>
> The line “ptp4l[1204.949]: failed to step clock: Invalid argument”
> probably indicates a driver bug since the clock step might be returning an
> error code as if the feature was not supported....
>
>
>
> Thanks,
>
> Jake
>
>
>
> *From:* Vadim Butakov [mailto:va...@gm...]
> *Sent**:* Friday, August 04, 2017 11:33 AM
> *To:* lin...@li...
> *Subject:* Re: [Linuxptp-users] ptp4l and multiple network devices
>
>
>
> Thanks for the reply
>
> The "ptp4l -i enp6s0 -i enp7s0 -m -S" command indeed launches fine, but
> doesn't provide the expected result:
> ptp4l[1185.776]: port 1: INITIALIZING to LISTENING on INIT_COMPLETE
> ptp4l[1185.777]: port 2: INITIALIZING to LISTENING on INIT_COMPLETE
> ptp4l[1185.777]: port 0: INITIALIZING to LISTENING on INIT_COMPLETE
> ptp4l[1186.939]: port 2: new foreign master 003053.fffe.20597e-1
> ptp4l[1187.460]: port 1: new foreign master 003053.fffe.20597f-1
> ptp4l[1190.539]: selected best master clock 003053.fffe.20597e
> ptp4l[1190.539]: foreign master not using PTP timescale
> ptp4l[1190.539]: running in a temporal vortex
> ptp4l[1190.539]: port 2: LISTENING to UNCALIBRATED on RS_SLAVE
> ptp4l[1191.443]: selected best master clock 003053.fffe.20597e
> ptp4l[1191.443]: port 1: LISTENING to PRE_MASTER on RS_MASTER
> ptp4l[1191.444]: foreign master not using PTP timescale
> ptp4l[1191.444]: running in a temporal vortex
> ptp4l[1192.348]: master offset 1501870118887912631 s0 freq +100000000
> path delay  13227463
> ptp4l[1195.048]: master offset 1501870118588155041 s0 freq +100000000
> path delay  13227463
> ptp4l[1195.444]: port 1: PRE_MASTER to MASTER on
> QUALIFICATION_TIMEOUT_EXPIRES
> ptp4l[1195.948]: master offset 1501870118491188556 s0 freq +100000000
> path delay  10117670
> ptp4l[1204.948]: master offset 1501870121056683138 s1 freq +100000000
> path delay  28161309
> ptp4l[1204.949]: failed to step clock: Invalid argument
> ptp4l[1205.848]: master offset 1501870120956815970 s2 freq +100000000
> path delay  28161309
> ptp4l[1205.848]: port 2: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
>
> etc.
>
> I assume there might be something wrong with my PC or network config, but
> don't know where to start. My linux kernel is 4.4.0-83-generic (I don't
> know if it matters).
>
> Cheers
>
>
>
>
>
> On Thu, Aug 3, 2017 at 9:52 PM, Richard Cochran <ric...@gm...>
> wrote:
>
> On Thu, Aug 03, 2017 at 01:12:48PM -0700, Vadim Butakov wrote:
> > First of all, thanks for ptp4l. You did an awesome job!
> > I'm using two PTP cameras connected to two ethernet network devices
> > (non-PTP) on my PC, and I'm trying to sync them by using the software
> PTP.
>
> Can you tell us why you want "slave only" mode on the PC's second
> interface?
>
> > Can you please give me a hint on what is the proper way to do it?
>
> Start one instance of ptp4l which uses both interfaces:
>
>     ptp4l -i enp6s0 -i enp7s0 -m -S
>
> The master/slave port roles will be selected automatically using the
> protocol.
>
> HTH,
> Richard
>
>
>