> -----Original Message----- > From: questions-bounces+edward.mischanko=arcelormittal....@lists.ntp.org > [mailto:questions- > bounces+edward.mischanko=arcelormittal....@lists.ntp.org] On Behalf Of > unruh > Sent: Saturday, May 25, 2013 9:27 AM > To: questions@lists.ntp.org > Subject: Re: [ntp:questions] Tighter regulation? > > On 2013-05-25, Mischanko, Edward T <edward.mischa...@arcelormittal.com> > wrote: > > > >> -----Original Message----- > >> From: Charles Swiger [mailto:cswi...@mac.com] > >> Sent: Friday, May 24, 2013 1:01 AM > >> To: Mischanko, Edward T > >> Cc: questions@lists.ntp.org > >> Subject: Re: [ntp:questions] Tighter regulation? > >> > >> On May 23, 2013, at 10:02 PM, "Mischanko, Edward T" > >> <edward.mischa...@arcelormittal.com> wrote: > >> > It takes too long to figure out it needs a more aggressive > correction. > >> > If I leave maxpoll at the default of 1024 seconds, my clock drifts > >> outside > >> > of 5 milliseconds consistently. > >> > > [Mischanko, Edward T] > > > > Measured by the best time sources I have available. I am saying that my > [Mischanko, Edward T]
What details do you want? I am syncing to 10 stratum 4 servers in my case. Servers outside of my LAN are blocked by the corporate firewall. > And maybe it is that "best" that is wrong. Why not give the details so > we can decide? > > > clock will drift to 5 milliseconds at maxpoll 10 and polling does not > > decrease to a level that will bring my clock back to an offset of +/- 1 > > millisecond. > > Note that on maxpoll 10, the clock will freerun for about 7000 sec > between disciplines. 5ms in 7000 sec is about 1PPM. [Mischanko, Edward T] I don't believe the room temperature changes much at this computer's location. Now if your computer > heats up and cools down by 20C over an hour that could change the clock > by a few ms. And ntpd is slow to respond to changes in clock rate. [Mischanko, Edward T] If I do maxpoll 8, then I get regulation within 1 millisecond. What other details would you like? I can post my loopstats in the future if that would be helpful? > What happens if you do maxpoll 6? Give us details, not vague statements. > [Mischanko, Edward T] I do not know how to analyze the peerstats file, but I can post it if that would help? > Also try plotting peerstats and the offset as a function of time. > _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
