Re: [Linuxptp-devel] [PATCH v2 3/3] port: Don't check timestamps from non-slave ports.

[Miroslav L. <mli...@re...>]

On Wed, May 26, 2021 at 02:05:01PM +0000, Amar Subramanyam wrote:
> Hi Miroslav,
> 
> I am afraid, the patches that was intended to fix the reported issue doesn't do so. The issue that we reported was not due to timestamps from non-slave port being compared in jbod mode.  But due to mono_interval (CLOCK_MONOTIC interval b/w two successive calls to clock_check_sample()) becoming high due to the execution BMCA algorithm between two successive calls to clock_check_sample() function. We believe that this is due to execution time being higher, and solution is to increase the default value of sanity_freq_limit accordingly.

The execution of the BMCA took 30 milliseconds? In that case the fix
would be to make the minimum interval longer. Can you post a strace -tt
log containing the last second leading to the fault?

I suspect it's rather the PHC interval that's wrong. There might be an
unexpected interaction with phc2sys. Can you reproduce the issue with
no phc2sys running?

-- 
Miroslav Lichvar