Re: [E1000-devel] [Linuxptp-devel] 82576 and PTP: poll tx timestamp timeout

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

> -----Original Message-----
> From: Gert-Jan Roskam [mailto:gjr...@on...]
> Sent: Wednesday, August 14, 2013 8:22 AM
> To: e10...@li...; linuxptp-
> de...@li...
> Subject: Re: [Linuxptp-devel] [E1000-devel] 82576 and PTP: poll tx
> timestamp timeout
> 
> 
> > On the linuxptp-users list, Alexander also recently reported frequent
> > time stamp failures on peer delay request messages. It is beginning to
> > look like the 82576 has a bug in this regard.
> >
> > Thoughts?
> 
> If is a bug on the 82576, it is triggered by the 'poll' method used in
> linuxptp 1.3, in the older version 1.1 it runs for days without errors.
> 
> Gert-Jan.
> 

Did you ever change the tx timestamp timeout value? It may be the case that you had increased that value before, (If you had not I would be very surprised...) You may try increasing the poll timeout to 5 or so and see if that helps the issue.)

It is likely that you are simply not waiting long enough. That is a known issue with some Intel cards regarding how the Tx timestamp is returned and there is nothing that the driver can do to decrease the time required to get the timestamp. :(

- Jake