Re: [Linuxptp-users] ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES

[- - <art...@gm...>]

Thanks for the help, I will try to change the driver.
Can you also help:
I periodically see this message from the slave side:
port 1: UNCALIBRATED to LISTENING on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES

Which leads to a loss of synchronization.
I don't see an error on the master side. I have added a tx and rx timestamp
output and I see that the master does not stop.
So I understand the problem is on the slave side.

Best regards,
Vyasheslav

чт, 28 июл. 2022 г. в 20:26, Richard Cochran <ric...@gm...>:

> On Thu, Jul 28, 2022 at 04:38:52PM +0600, - - wrote:
> > Yes, but it doesn't always work.
> > I increased it to 100msec.
>
> That driver, e1000e, uses a plain old "work" to process the Tx time
> stamp.  Plain "work' runs at the lowest priority in Linux.  On a busy
> system, even higher delays than 100 ms are possible.
>
> The way to fix this is change the driver to use the PTP kworker thread
> by moving the "work" code to the .do_aux_work callback.
>
> Then you can set the kernel thread's schedule to SCHED_FIFO at high
> priority using the chrt command.
>
> Thanks,
> Richard
>
>
>