[LinuxPPS] Performance of 2.6.23.12

[Heiko Gerstung]

Udo van den Heuvel schrieb:
> Heiko Gerstung wrote:
>   
>> After looking at my ntpq -p stats for a while I see that PPS performance 
>> is not acceptable so far. I see an offset of more than 5 ms between my 
>> GPS string and the Atom driver. Additionally the jitter of the Atom PPS 
>> seems to be very high (more than 2ms). The same hardware configuration 
>> works fine with 2.6.15.1 and PPSKit Light from U.Windl.
>>
>> I would be grateful for hints how I can fine tune this and where to look 
>> at. Is there a kernel config option I should check?
>>     
>
> There is some timing-related options.
> I don't know them all.
> But I'd say the tickless option is not good.
>
> A complete list for timing-related tuning would be very welcome!
>   
Yes, that would definitely help. I will see what I can do in regards to 
this.

If anyone reading this can post the performance of his machine(s) and 
include LinuxPPS version, Kernel version, Refclock driver and ntpd 
Version, I would appreciate that.

Best Regards,
Heiko

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