Re: [Linuxptp-users] phc offset explodes after a while

[Ledda W. E. <Wil...@it...>]

I'm working with i350 and the IGB driver without any problem.

I know "very well" your problem because I was getting the same and I was wander about the possibility of a driver/HW issue. But after many days of continuous tests and a lot of debug information collected (igress and origin timestamp from ptp4l, tcpdump for the network) I haven't seen any error due to inconsistent read of the HW clock or something like that, but I instead discovered a problem in a TC in our facility.

So I feel to say that i350 and the driver are ok.

Regards

William


-----Original Message-----
From: Koehrer Mathias (ETAS/ESW5) [mailto:mat...@et...] 
Sent: 31 January 2014 14:18
To: Vick, Matthew; lin...@li...
Cc: Richard Cochran; Ledda William EXT
Subject: Re: [Linuxptp-users] phc offset explodes after a while

Hi Matthew,

thanks for the information.

> Thanks for your report on this! We've had a few reports of this now 
> and are investigating it internally. We currently believe we may have 
> a hardware bug on 82574L where some reads of the device clock are 
> corrupted.
> We are testing a workaround now and will be submitting the patch 
> upstream once it has passed our internal validation.

Is the Intel IGB (i350 controller) also affected or which Intel adapter to you recommend for PTP?
We are fairly free in choosing a suitable adapter.

Thanks for a short feedback.

Best regards

Mathias