Re: [Linuxptp-users] Hardware PTP clock synchronization

[Richard C. <ric...@gm...>]

On Sat, Aug 03, 2013 at 10:08:08PM +0300, Alex Gavrilov wrote:
> > What did not work?
> 
> Richard, you wrote: "In any case, the hardware is clearly missing time
> stamps. You can just ignore this error.". But these errors are
> constantly - during 4 hours only once sinchronization was happened.

You mean that only one delay request every four hours is successful?

The PTP can work will occasional dropping of messages, but what you
have here is obviously not good enough.

> Spec update for 82576 not contains bugs with 1588:

Okay, but after you finish with Intel, you can expect to see a new
erratum published.

> How a series of 210, 350, 82576 refers to a series of IXPxxx?

This is just an example of a real life hardware bug from Intel. You
said that your boss cannot believe such a thing is possible. However,
it is not a matter of belief, hardware bugs are an undeniable fact.

If I were you, I would post your issue to the e1000-devel mailing
list. It is most probably a hardware bug (but perhaps a driver bug).
In any case, it is not a bug in linuxptp.

Also, buy another card. From the Intel cards, I have tested the 82574,
the 82580, and the i210.

HTH,
Richard