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

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

On Wed, Aug 14, 2013 at 03:23:06PM +0000, Vick, Matthew wrote:
> On 8/14/13 12:31 AM, "Richard Cochran" <ric...@gm...> wrote:
> 
> 
> I believe changing options does make a difference for the 82576. At least,
> I had issues with E2E in the past--I would need to re-test to confirm if
> there is still an issue or not. I remember getting Rx packets to be
> timestamped too close together, which the 82576 cannot support, but I did
> grab the tip of the ptp4l tree and not a stable release at the time.

Wait a minute, "Rx packets"?

I thought the issues were with Tx packets (and the driver does try to
correctly work around this).

The issue reported here and in Alexander's thread are about missing
transmit time stamps. That much is clear from the logs. If incoming
packets can spoil transmit time stamps, then all bets are off, and 
the card is just not usable.
 
> Adding Jake to the thread, since I'm fairly certain that Alexander was
> using a modified driver or stack to do something non-standard, so it
> wasn't a bug with the 82576. Jake, do you remember what the root cause was
> on that one?

This was never resolved, and Alex stopped responding to questions. But
he appears to me to have had the same symptoms.

Thanks,
Richard