[ntp:questions] best gps receiver for time synchronization

Richard B. Gilbert rgilbert88 at comcast.net
Wed Mar 11 15:07:55 UTC 2009


David J Taylor wrote:
> David Woolley wrote:
> []
>> You won't get millisecond accuracy on Windows.  Although the software
>> clock can be disciplined to better than a millisecond, applications
>> can only read to one tick, which is 10ms by default and 1ms with the
>> fastest multi-media timers (which risks lost ticks).
> 
> David, do you have a reference for your "risks lost ticks" statement as 
> applied to Windows?
> 
> Thanks,
> David

ISTR that there have been previous references in this newsgroup. 
Specifically, EIDE disk drivers can mask or disable interrupts  for a 
period long enough  to cause a "lost tick".  I believe the group is 
archived somewhere. . . .




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