Re: [Linuxptp-users] Building a PTP grandmaster with disciplined oscillator

[Andre P. <and...@sr...>]

On 8/3/22 15:33, Richard Cochran wrote:
>> I was wondering if someone has used this successfully at all?
> 
> Yes, I would guess so.

Is there a write-up or something similar available you know?


>> In general, what are the steps to set this up? Is this something managed in
>> the NIC driver itself or do I have to (permanently) run the `ts2phc` to keep
>> to PHC in sync?
> 
> You need to run ts2phc or similar.  In general, the NICs are dumb devices.

Got you. Thanks.

>   
>> Are there studies/measurements that compare the stability of such a system
>> to e.g. commercial PTP grandmaster solutions?
> 
> I haven't seen any.  I've done my own reports showing, for example,
> linuxptp + Intel210 + uBlox GPS radio performing comparably to
> commercial GM solutions.

Same question, anyone aware of a write-up or blog post that gives some 
instructions on HW wiring and (if any) driver modifications?


> However, making a reliable GM product is quite a bit of work.  The PTP
> software stack is only one piece of the puzzle.

Yes of course. This effort is just to develop a poor man's GM as a PoC.

But nonetheless interesting to observe that there is practically no NIC 
out there that brings together all the pieces. Should be quite easy to 
do. Cards like the Intel XXV710-DA2T or E810-XXVDA4T with GPS input are 
hard to get and $$$.

Thanks
Andre