[ntp:questions] precision in a driver

Richard B. Gilbert rgilbert88 at comcast.net
Fri Jan 4 22:13:32 UTC 2008


Unruh wrote:
> "Richard B. Gilbert" <rgilbert88 at comcast.net> writes:
> 
> 
>>Folkert van Heusden wrote:
>>
>>>Hi,
>>>
>>>The precision-field set by a driver, what should one set there? If a
>>>clock gives ms values, -10? Or is it the real quality of the
>>>time-source? Like: maybe that on average the source has a quality of
>>>10ms.
>>>
>>>
>>>Folkert van Heusden
>>>
>>
> 
>>The precision is the smallest possible difference between two 
>>consecutive requests for the time!  It's specified as a negative power 
>>of two.
> 
> 
> On most systems now adays it is of the order of microseconds (-19 or -20)
> 
> 
> 
> 

My Sun Solaris boxes report -21.

Measure with micrometer, mark with chalk, cut with axe!




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