Re: [ntp:questions] Choice of local reference clock seems to affect synchronization on a leaf node

2011-11-08 Thread David L. Mills
unruh, unhurt, 1. You have a broken interpretation on how the NTP discipline algorithm works. See the online document "How NTP Works," and in particular the discipline and clock state machine pages. 2. Your compar

Re: [ntp:questions] Choice of local reference clock seems to affect synchronization on a leaf node

2011-11-08 Thread unruh
On 2011-11-08, David L. Mills wrote: >unruh, > > unhurt, ?? Am I supposed to read something into this mispelling? > > 1. You have a broken interpretation on how the NTP discipline algorithm > works. See the onli

[ntp:questions] Seeing large jitter and delay in recent ntpd and recent Solaris

2011-11-08 Thread Fran
When running recent versions of ntpd and with a recent Solaris patch, I see large delay and jitter in ntpq based output, and in the stats files. I am running in a high performance configuration where I'm trying to minimize offset. I think it is a Solaris problem in asynchronous i/o processing, w

Re: [ntp:questions] Seeing large jitter and delay in recent ntpd and recent Solaris

2011-11-08 Thread Chuck Swiger
Hi-- On Nov 8, 2011, at 12:29 PM, Fran wrote: > My ‘high performance’ configuration is running ntpd bound to processor 0 on > an SMP, and at highest priority. My poll rate is 16 sec. And I’m running ntpq > locally so ntpq is communicating with ntpd over the loopback interface. Most > of these c

Re: [ntp:questions] Seeing large jitter and delay in recent ntpd and recent Solaris

2011-11-08 Thread Dave Hart
On Tue, Nov 8, 2011 at 23:26, Chuck Swiger wrote: > If you've set ntpd's priority above 100 via realtime scheduling class, > then it has priority over the system kernel threads which service > network interrupts.  select() might be legitimately returning zero > because ntpd is running before the N

Re: [ntp:questions] Choice of local reference clock seems to affect synchronization on a leaf node

2011-11-08 Thread Dave Hart
On Fri, Nov 4, 2011 at 23:27, Nathan Kitchen wrote: > I'm curious about some behavior that I'm observing on a host running > ntpd as a client. As I understand it, configuring a local reference > clock--either an undisciplined local clock or orphan mode--shouldn't > help me, but I see different beh

Re: [ntp:questions] Choice of local reference clock seems to affect synchronization on a leaf node

2011-11-08 Thread Nathan Kitchen
On Tue, Nov 8, 2011 at 6:59 PM, Dave Hart wrote: > > On Fri, Nov 4, 2011 at 23:27, Nathan Kitchen > wrote: > > I'm curious about some behavior that I'm observing on a host running > > ntpd as a client. As I understand it, configuring a local reference > > clock--either an undisciplined local cloc

Re: [ntp:questions] Choice of local reference clock seems to affect synchronization on a leaf node

2011-11-08 Thread Dave Hart
On Wed, Nov 9, 2011 at 03:12, Nathan Kitchen wrote: > On Tue, Nov 8, 2011 at 6:59 PM, Dave Hart wrote: >> I agree that I would not expect to see any difference in behavior >> between LAN source only (#1) and LAN source + orphan mode (#2).  I am >> not surprised to see difference in behavior with

Re: [ntp:questions] Why do the nmea and pps drivers differ regarding the default for flag2?

2011-11-08 Thread Dave Hart
On Wed, Oct 26, 2011 at 09:32, Dave Hart wrote: > On Wed, Oct 26, 2011 at 04:07, Doug Calvert > wrote: >> Hello, >> >>  Why do the nmea and pps drivers differ regarding the default for flag2? How >> would a user know which is appropriate? >> >>> PPS(22): >>> flag2 0 | 1 >>> Specifies PPS capture

Re: [ntp:questions] Choice of local reference clock seems to affect synchronization on a leaf node

2011-11-08 Thread Nathan Kitchen
On Tue, Nov 8, 2011 at 7:27 PM, Dave Hart wrote: > > On Wed, Nov 9, 2011 at 03:12, Nathan Kitchen > wrote: > > On Tue, Nov 8, 2011 at 6:59 PM, Dave Hart wrote: > >> I agree that I would not expect to see any difference in behavior > >> between LAN source only (#1) and LAN source + orphan mode (#