Re: [Linuxptp-users] Loss of sync with 25% of CPU load

[Diego G. P. <gpr...@un...>]

Hello Miroslav,

> That NIC and driver are solid in my experience, so I'd suspect an
> issue with the system clock.
>
> Check current and available clocksources:
> cat /sys/devices/system/clocksource/clocksource0/current_clocksource
> cat /sys/devices/system/clocksource/clocksource0/available_clocksource
>
> and try switching to a different clocksource, e.g.
>
> echo hpet > 
> /sys/devices/system/clocksource/clocksource0/current_clocksource

The available clocks in such path were tsc itself and acpi_pm. I do not 
jave "hpet". I changed it for acpi_pm and the results are equal. It 
appears the message "clockcheck: clock jumped backward or runnin slower 
than expected!". Then the slave port change from slave to uncalibrated. 
It tries to synchronize to the GM a little more and then it converts 
into master.

I tried the test with a normal kernel without Preemp_RT patch and the 
same results are.


Diego