Re: [Linuxptp-users] Irregular rate of Delay Request messages

[Ray V. <ree...@gm...>]

Ah, that explains it. Thanks, Miroslav!

And what about an ever decreasing master offset value at -max freq?
I assume the master offset value is in nanosecs? It seems that in 120
seconds, the master offset value decreases with appr 90 secs

On Tue, Aug 30, 2022 at 2:43 PM Miroslav Lichvar <mli...@re...>
wrote:

> On Tue, Aug 30, 2022 at 02:27:22PM +0200, Ray Vanbeek wrote:
> > Running ptp4l as a slave, what influences the rate at which Delay Request
> > Messages are sent out? Pretty standard, the GM send out Announce Messages
> > every 2 secs, Sync and Follow_Up Messages every second.
> > The slave sends out Delay Request Messages irregular:  ranging from <1
> sec
> > to 16 sec between subsequent messages. The GM always responds immediately
> > to a DelayReq.
>
> That's a feature of PTP. Clients are required to randomize their
> interval of delay requests in order to minimize collisions at the server.
>
> If you see the interval reaching 16 seconds, that means
> logMinDelayReqInterval is 3 on the server.
>
> --
> Miroslav Lichvar
>
>