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- To: chrony-users@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-users] Chrony on CM4
- From: James Clark <jjc@xxxxxxxxxx>
- Date: Tue, 5 Sep 2023 08:00:56 +0700
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On Mon, Sep 4, 2023 at 9:38 PM Miroslav Lichvar <mlichvar@xxxxxxxxxx> 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 <mlichvar@xxxxxxxxxx> 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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