Hello Miroslav,
This is Centos 7.9 with linuxptp-2.0-2.el7_9.1.x86_64 installed, running kernel
version 3.10.0-1160.41.1.el7.x86_64.
It is running on a Lenovo thinkpad t440, with a built-in intel I218-LM ethernet
controller, that uses the e1000e kernel driver.
The output of ethtool -T enp0s25 is:
ethtool -T enp0s25
Time stamping parameters for enp0s25:
Capabilities:
hardware-transmit (SOF_TIMESTAMPING_TX_HARDWARE)
software-transmit (SOF_TIMESTAMPING_TX_SOFTWARE)
hardware-receive (SOF_TIMESTAMPING_RX_HARDWARE)
software-receive (SOF_TIMESTAMPING_RX_SOFTWARE)
software-system-clock (SOF_TIMESTAMPING_SOFTWARE)
hardware-raw-clock (SOF_TIMESTAMPING_RAW_HARDWARE)
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
off (HWTSTAMP_TX_OFF)
on (HWTSTAMP_TX_ON)
Hardware Receive Filter Modes:
none (HWTSTAMP_FILTER_NONE)
all (HWTSTAMP_FILTER_ALL)
ptpv1-l4-sync (HWTSTAMP_FILTER_PTP_V1_L4_SYNC)
ptpv1-l4-delay-req (HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ)
ptpv2-l4-sync (HWTSTAMP_FILTER_PTP_V2_L4_SYNC)
ptpv2-l4-delay-req (HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ)
ptpv2-l2-sync (HWTSTAMP_FILTER_PTP_V2_L2_SYNC)
ptpv2-l2-delay-req (HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ)
ptpv2-event (HWTSTAMP_FILTER_PTP_V2_EVENT)
ptpv2-sync (HWTSTAMP_FILTER_PTP_V2_SYNC)
ptpv2-delay-req (HWTSTAMP_FILTER_PTP_V2_DELAY_REQ)
So I followed your suggestion for a dummy entry. I made it in the form:
[ptp_domain 0]
interfaces enp0s25
and my main domain entry is
[ptp_domain 44]
interfaces enp0s25
delay 10e-6
ptp4l_option logging_level 7
observations:
ptp4l on domain 0 always chooses the local clock as its best master
ptp4l on domain 44 seems to cycle between
"UNCALIBRATED to LISTENING on "ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES
and
"LISTENING TO UNCALIBRATED on RS_SLAVE"
phc2sys is only listening to the ptp clock for domain 0
which will not get synced since there is no domain 0 ptp clock.
And chronyc sources now shows two ptp clocks that are not usable.
chronyc sources
210 Number of sources = 5
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
#? PTP0 0 2 0 - +0ns[ +0ns] +/- 0ns
#? PTP1 0 2 0 - +0ns[ +0ns] +/- 0ns
^+ india.colorado.edu 1 4 203 4 +7589us[+7589us] +/- 29ms
^+ uslax1-ntp-002.aaplimg.c> 1 4 377 5 -1059us[-1059us] +/- 14ms
^* clock.fmt.he.net 1 4 377 6 -2296us[-2251us] +/- 13ms
So it would seem that while that dummy entry stops the " port 1: received SYNC
without timestamp" messages, it doesn't do much good afterwards.
-----Original Message-----
From: Miroslav Lichvar <[email protected]>
Sent: Monday, November 8, 2021 01:09
To: Brooks, Jason <[email protected]>
Cc: [email protected]
Subject: [External]Re: [Linuxptp-users] Timemaster question with ptp4l and
chrony
CAUTION: This email originated from outside of the organization. Do not click
links or open attachments unless you recognize the sender and know the content
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On Thu, Nov 04, 2021 at 10:55:49PM +0000, Brooks, Jason wrote:
> 1. Chronyc sources shows
> * 210 Number of sources = 5
> * MS Name/IP address Stratum Poll Reach LastRx Last sample
> *
> ===============================================================================
> * #? PTP0 0 2 0 - +0ns[ +0ns]
> +/- 0nsq
> * ^+ time-c-b.nist.gov 1 4 377 5 +7083us[+7083us]
> +/- 28ms
> * ^+ time2.google.com 1 4 377 7 +333us[ +333us]
> +/- 28ms
> * ^* usscz2-ntp-001.aaplimg.c> 1 4 377 5 -780us[ -780us]
> +/- 11ms
> * ^+ clock.fmt.he.net 1 4 377 6 -2245us[-2245us]
> +/- 14ms
>
> Why is chrony showing PTP0 as a problem?
The refclock (i.e. ptp4l+phc2sys) didn't provide any samples.
FYI, Google NTP servers uses a nonstandard timescale (leap smear) and must not
be combined with standard NTP servers.
> 1. And when using this system as an ntp source on another system it shows
> as a stratum 2 system. Shouldn't this be a stratum 1, given the ptp0 clock?
> 2. A lot of messages in /var/log/messages:
> * [44:enp0s25] port 1: received SYNC without timestamp
What OS and version is it?
Does it work with SW timestamping? If you add a dummy PTP domain to
timemaster.conf before the 44, it should force 44 to use SW timestamping.
--
Miroslav Lichvar
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