Re: [Linuxptp-users] Need help debugging failed clock synchronization

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

On Wed, Mar 16, 2016 at 10:20:35AM -0700, John Hubbard wrote:
> After changing the 'time_stamping' option in /etc/ptp4l.conf from 
> hardware to software and restarting ptp4l I now see much better 
> behavior.

Yes, but probably you are disappointed having to forego the HW
synchronization performance.  At least this test shows that your card
most likely has a HW bug.

> I believe that I did try the Intel driver but didn't see any success.  I 
> found version 3.3.3 of the driver at [3], followed the instructions in 
> the readme.  At the time I was running the 3.10.0-327.10.1 kernel.  The 
> timestamp (see below) on e1000e.ko matches up with when I performed the 
> build, and the file size is way bigger (6M as compared to ~780K) for the 
> ko on the older 3.10 and the newer 4.5 kernels.  I did an rmmod (which 
> hung my SSH session) I then rebooted the machine (which I assume loaded 
> the new driver).

I wouldn't assume that.  Either do rmmod/insmod by hand (on the
console!) or simply rename or move the original driver before
rebooting.

Thanks,
Richard