[ntp:questions] no ntp synchronisation: 2s to 6s time shift !

Thierry MARTIN thierry-martin at ifrance.com
Fri Feb 15 10:06:02 UTC 2008


If I understand your post, tsc is the same as acpi_pm ?

Was I just a lucky guy with this config?

(:- You've just killed my enthousiasm ... :-)

David Woolley a écrit :
> Thierry MARTIN wrote:
>> I have been trying acpi_pm clocksource for a few days now and the 
>> results are quite good :-).
>> The time drift is less than 1s per day (I would even say less that 
>> 500ms but this has to be confirmed) which is much better than the 
>> default config with tsc (>2s /day).
> It's almost certain that the same hardware time source is used for both, 
> so discrepancies are likely to be attributable to software issues 
> (although those may include problems in calibrating the frequency of 
> various sources empirically, rather than by knowing how they derive from 
> the common source).

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