[ntp:questions] setting the time/frequency before starting ntpd to avoid slow convergence (PPS)

David Taylor david-taylor at blueyonder.co.uk.invalid
Sat Oct 13 03:49:24 UTC 2012

On 13/10/2012 00:25, Richard B. Gilbert wrote:
> On 10/12/2012 6:25 PM, gabs wrote:
>> Instead of waiting several minutes (hours?) to reach microsecond
>> offsets, I've been using a chrony-like
> method to set the time and frequency before starting ntpd:
> It's hours!  About ten hours to get the best time the system is capable of!
As I've mentioned before, 10 hours may be much longer than is needed for 
some systems.  Many PCs here settle to the best they can reach within a 
few minutes, but I am referring to Windows PCs either with a local time 
source (GPS/PPS), or with a short polling interval to LAN-based 
stratum-1 servers.  But these are not "microsecond offset" systems.

BTW: I now have one Windows-8 system which is Wi-Fi connected and 
showing very good performance, doubtless due in part to the new precise 
GetSystemTime function call.  On the other hand, I have another Wi-Fi 
connected WIndows-8 PC which has "average" performance.  How well Wi-Fi 
works seems to be a little luck of the draw....
Web: http://www.satsignal.eu

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