Re: [Linuxptp-users] Status file of achieved time synchronization

[Julien H. <ju...@ya...>]

HiMathias,

Only by using the nohz=off option in the kernel command line, the delay in phc2sys dropped from several microseconds to a hundred nanoseconds.

Julien.



________________________________
 De : Koehrer Mathias (ETAS/ESW5) <mat...@et...>
À : Richard Cochran <ric...@gm...> 
Cc : "lin...@li..." <lin...@li...> 
Envoyé le : Mercredi 19 février 2014 15h08
Objet : Re: [Linuxptp-users] Status file of achieved time synchronization
 

Hi Richard!

> BTW, in case you did not see the recent discussion about it, you
> should know that the Linux kernel option CONFIG_NO_HZ_IDLE is harmful
> to your use case. I recommend to either disable this at compile time
> or to add "nohz=off" to your kernel command line.
Thanks for the hint.
With my kernel 3.2 there is no config option CONFIG_NO_HZ_IDLE.
I have only "CONFIG_NO_HZ". Is this also harmful?


Regards


Mathias


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