Re: [Linuxptp-users] Fixing offset jump at reset?

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

> -----Original Message-----
> From: jor...@gm... [mailto:jor...@gm...]
> Sent: Friday, August 10, 2018 10:45 AM
> To: Keller, Jacob E <jac...@in...>
> Cc: Richard Cochran <ric...@gm...>; Cliff Spradlin via Linuxptp-
> users <lin...@li...>; Chris Caudle
> <ch...@ch...>; Cliff Spradlin <csp...@wa...>
> Subject: Re: [Linuxptp-users] Fixing offset jump at reset?
> 
> Hi Richard and Jacob,
> 
> The most interesting is that on RHEL7 the 36 second offset occurs after the
> tx_timestamp_timeout error and after that the offset only drifts further away.
> (After staying ‘synchronised’ in the 36xxxxxxxxx range for a little of time)
> 
> I had tried the exact same thing between two HP Z440 PC’s (including the exact
> same Ethernet adapter + driver) running Ubuntu (instead of RHEL7). The
> tx_timestamp_timeout erorr occurred also on this slave server when pushing an
> .iso of +-5GB over the Ethernet line, except it didn’t got an offset of 36 seconds,
> and it even re-synchronised after a while, while the RHEL7 slave only drifts
> further away when pushing a lot of network traffic from that PTP slave server
> over the network.
> 
> Jord

Yep, this is indicative of a driver issue, possibly a bug in some RHEL backport.

Thanks,
Jake