I found that the ptp clock will be synchronized by the system clock every time I down then up the port or start ptp4l. I wonder why there is such a behavior.
I found that in addition to the above behavior, when the ioctl(fd, SIOCSHWTSTAMP, &ifreq) driver is called, the ptp clock is also synchronized by the system clock, maybe someone can tell me why.
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I would like to confirm if you are using MLNX OFED driver. THis can be verified by running ofed_info -s
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Thank you for your reply, the driver i use is as follows: