On 4/28/2021 12:01 AM, ramesh t via Linuxptp-users wrote: > hi, > > In our system, we have 3-4 ptp4l services running as master (C1 mode) > providing clock to external device. Our system is synced using ptp > support/slave connected to a BC. From the synced slave/support > interface, phc2sys is used to sync master interface. All the master and > slave ptp4l and phc2sys are core pinned. Once in a while phc offset > which is synced into master interface using phc2sys jumps into 4 digit > value. Any suggestion on how to debug this further. > > Apr 28 03:26:51 k8s-worker-0 phc2sys: [131370.261] enp104s0f1 phc > offset 4 s2 freq -11419 delay 3610 > Apr 28 03:26:52 k8s-worker-0 phc2sys: [131371.261] enp104s0f1 phc > offset 3 s2 freq -11418 delay 3603 > Apr 28 03:26:53 k8s-worker-0 phc2sys: [131372.261] enp104s0f1 phc > offset 3 s2 freq -11417 delay 3568 > *Apr 28 03:26:54 k8s-worker-0 phc2sys: [131373.262] enp104s0f1 phc > offset -4973 s2 freq -16393 delay 19341* > *Apr 28 03:26:55 k8s-worker-0 phc2sys: [131374.262] enp104s0f1 phc > offset 4977 s2 freq -7934 delay 3594* > *Apr 28 03:26:56 k8s-worker-0 phc2sys: [131375.262] enp104s0f1 phc > offset 1471 s2 freq -9947 delay 3591* > Apr 28 03:26:57 k8s-worker-0 phc2sys: [131376.262] enp104s0f1 phc > offset 0 s2 freq -10977 delay 3587 > Apr 28 03:26:58 k8s-worker-0 phc2sys: [131377.262] enp104s0f1 phc > offset -449 s2 freq -11426 delay 3596 >
Ok > After a while, we are observing NIC interface going down also. > > Apr 28 03:28:22 k8s-worker-0 phc2sys: [131461.271] enp104s0f1 phc > offset 5 s2 freq -11421 delay 3559 > Apr 28 03:28:23 k8s-worker-0 kernel: i40e 0000:68:00.1 enp104s0f1: NIC > Link is Down > Apr 28 03:28:23 k8s-worker-0 kernel: br0: port 4(enp104s0f1.1) entered > disabled state > > Please suggest. This looks like the i40e driver. This hardware has a clock that is derived from the link speed. For this reason, the clock increment value has to change whenever link status changes. I suspect that when the link goes down, the driver is re-programming the increment value which is why you see the change in clock. You'd need to figure out why the link is dropping. There isn't much that can be done from a driver or ptp4l perspective here. Thanks, Jake > > Regards, > Ramesh > > > _______________________________________________ > Linuxptp-users mailing list > Linuxptp-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linuxptp-users > _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users