Re: [Linuxptp-users] question on "-a" option in phc2sys (and boundary clock etc.)

[David M. <da...@ar...>]

For what it's worth, the Mellanox-based 1/10G devices I have access to seem
to share one PHC between both ports:

    bash-4.4# ethtool -T ma5 | grep Clock
    PTP Hardware Clock: 4
    bash-4.4# ethtool -T ma6 | grep Clock
    PTP Hardware Clock: 4
    bash-4.4# ethtool -i ma5
    driver: mlx4_en

    bash-4.4# lspci | grep Mellanox
    05:00.0 Ethernet controller: Mellanox Technologies MT27520 Family
[ConnectX-3 Pro]

We don't use them in this way, and I haven't played or tested this aspect
but if'd be happy to poke them a little if anyone has any requests.

- David

On Thu, 23 May 2019 at 12:04, Richard Cochran <ric...@gm...>
wrote:

> On Wed, May 22, 2019 at 04:01:18PM -0400, Sanjay Bhandari wrote:
> > My question is about the scenario where they do share the same hardware
> > clock (as described in the manual).
>
> The only HW I know is the Freescale (nxp) ETSEC with three ports, all
> sharing one clock.
>
> Maybe there are other such devices, but I haven't seen them or even
> heard of them.
>
> Thanks,
> Richard
>
>
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