[ntp:questions] best gps receiver for time synchronization
Richard B. Gilbert
rgilbert88 at comcast.net
Wed Mar 11 15:39:55 UTC 2009
David J Taylor wrote:
> Richard B. Gilbert wrote:
>> 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
>>> David, do you have a reference for your "risks lost ticks" statement
>>> as applied to Windows?
>> 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. . . .
> Thanks, Richard. I can imagine that any disks working in PIO mode
> wouldn't be welcome friends either. The last EIDE desktop PC I bought
> was some seven years ago, so I hope it's a problem which won't affect
> too many people, and all being well not those starting from scratch.
I don't know if SATA is any better. I don't run ntp on my PC.
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