[time-nuts] iPhone keeping better time?
dot at dotat.at
Wed Nov 16 11:43:39 EST 2011
Miguel Gonçalves <mail at miguelgoncalves.com> wrote:
> On 16 November 2011 12:47, David J Taylor <david-taylor at blueyonder.co.uk>wrote:
> > Certainly doesn't apply to my iPad2. Currently 40.8 seconds out under
> > 5.0.1. Sinful it doesn't use NTP ( I suppose you know who didn't approve
> > of NTP, since it wasn't under Apple's firm grip).
Apple run their own NTP servers and ship their Macs configured to use them
to sync time.
> I own a Mac Mini and a MacBook. Their NTP implementation is simply a joke.
> Even with a local stratum 1 I can't get decent accuracy. :-(
I believe the Mac NTP client is shipped with a very large maximum polling
interval. Try reducing it.
Also, ntpd does not work well on machines that are often suspended. I
don't know if Apple have done anything to fix that.
f.anthony.n.finch <dot at dotat.at> http://dotat.at/
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