Re: Chrony on CM4

On Mon, Sep 4, 2023 at 9:38 PM Miroslav Lichvar <[email protected]> wrote:
>
> On Mon, Sep 04, 2023 at 09:27:22PM +0700, James Clark wrote:
> > On Mon, Sep 4, 2023 at 9:12 PM Miroslav Lichvar <[email protected]> wrote:
> >
> > >
> > > To confirm that, you could configure the client to use a distant public
> > > NTP server to give the client more time to get its TX timestamp and
> > > see if the success rate of HW timestamping improves.
> > >
> >
> > I think I'm misunderstanding something. Wouldn't this need a distant public
> > server that supported NTP-over-PTP? Do such things exist?
>
> Oh, right. You can try it with one of my servers - 51.68.44.27 in France.

With a CM4 client with this config talking to that server:

server 51.68.44.27 minpoll 0 maxpoll 0 xleave port 319
hwtimestamp * rxfilter ptp minpoll 2
hwtstimeout 1
ptpport 319

I get a similar mixture of HW/Kernel timestamping: 2382 K H, 33 H H, 5
K K, 0 H K.

James

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