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

[Keller, J. E <jac...@in...>]

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...<mailto: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