Hello,
I'm running ptp4l as a slave in a VM on a ESXi host to sync with a master
running
on a separated device. With the default VMNET as a virtual NIC attached to
the VM,
/dev/ptp* didn't show up in the VM. So I replaced VMNET with the more
promising e1000e.
However, ptp clock appears to be malfunctioning. Here are the symptoms.
* ptp4l and phc2sys doesn't complain but reports ridiculously high values
[...]
ptp4l[55180]: [64494.452] port 1: UNCALIBRATED to SLAVE on
MASTER_CLOCK_SELECTED
ptp4l[55180]: [64505.577] rms 9613 max 23274 freq -5842 +/- 1303 delay
24550 +/- 2445
phc2sys[56628]: [66058.723] CLOCK_REALTIME phc offset 415929564434 s1
freq +100000000 delay 8392
* ethtool: looks good
Time stamping parameters for ens224:
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: 1
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)
* dmesg
e1000e 0000:13:00.0 ens224: Timesync Rx Control register not set as
expected
After turning ptp4l and phc2sys down:
* hwstamp:
SIOCSHWTSTAMP failed: Resource temporarily unavailable
* testptp
*PHC time can be set manually but doesn't run, i.e. time value is
constant.*
Do I miss kernel or driver capabilities?
Would I have to investigate possible limitation of ESXi?
Regards,
Patrick
Other details
- OS: Ubuntu 20.04
- Kernel: 5.11.0-34
- NIC driver e1000e
- I appended `pcie_aspm=off` to the linux command line, like recommended at
several places on the web
- timestamping method: software or hardware
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