[LinuxPPS] ntp: add hardpps implementation

[Udo van den Heuvel]

On 2010-10-10 18:45, Alexander Gordeev wrote:
>> I have NO_HZ
>>
>>> In my current hardpps kernel CONFIG_NO_HZ is set (y). 
>>> Considering the 'rock solid' offset of 127 us, should I change this to 'n' ?
>>
>> Any guru's?
> 
> To make hardpps() stable you have to disable CONFIG_NO_HZ if your
> kernel version is greater or equal then 2.6.33. You should see it going
> wild using ppstest or ppswatch from pps-tools. Can you please test it
> and add this info to the wiki?

I can, but how can I see in my ntpd-running setup that stuff is wrong?
The mrtg PLL graph shows more relative stability so far. (needs more
time to prove)
And this is 2.6.35.7.

Udo