Re: [Linuxptp-users] recvmsg tx timestamp failed: Resource temporarily unavailable

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

Yes. It looks like you've got incorrect stamps for some of those, or some of the operations aren't correct.

You should see log output similar to 
ptp4l[3530.070]: master offset -1360149853961689539 s0 adj      +0 path

Except that the master offset field should shrink, and adj should increase to a small value and stabilize. Also path should show the path delay value

Those fields are displayed in nanoseconds, and you shouldn't see many other messages in between. Certainly negative path delay should correct itself quickly unlike what you are seeing.

- Jake

> -----Original Message-----
> From: Richard Cochran [mailto:ric...@gm...]
> Sent: Wednesday, February 06, 2013 9:04 AM
> To: Rayagond Kokatanur
> Cc: Keller, Jacob E; lin...@li...
> Subject: Re: [Linuxptp-users] recvmsg tx timestamp failed: Resource
> temporarily unavailable
> 
> On Wed, Feb 06, 2013 at 07:40:29PM +0530, Rayagond Kokatanur wrote:
> 
> > Following are log message on SLAVE side,
> ...
> > ptp4l[3529.856]: negative path delay -273111420
> > ptp4l[3529.856]: path_delay = (t2 - t3) + (t4 - t1)
> > ptp4l[3529.856]: t2 - t3 = -1331967748
> > ptp4l[3529.856]: t4 - t1 = +785744908
> > ptp4l[3529.856]: c1          0
> > ptp4l[3529.856]: c2          0
> > ptp4l[3529.856]: c3          0
> > ptp4l[3530.070]: master offset -1360149853961689539 s0 adj      +0 path
> delay -273111420
> 
> It looks like your driver's time stamps are not correct. Have you
> verified that the time stamps are working with your driver?
> 
> Richard