Re: [ntp:questions] Question on ntpd -g -q option and Step Threshold

2010-11-18 Thread Hal Murray
In article <0a89d263-0355-4dee-8c9c-b4912076d...@w38g2000pri.googlegroups.com>, SteveW writes: >I wanted to confirm that my understanding of the step threshold and >how it applies to ntpd used with -g -q options (similar to ntpdate) is >correct. > >With the default step threshold of 128 ms, if a

Re: [ntp:questions] NTP nanokernel, recent experience, PTP

2010-11-18 Thread Bruce Lilly
On Thu, 18 Nov 2010 18:00:11 +, Miernik, Jerzy (Jerzy) wrote: > 2. Are offsets as small as to be measured in (tens of) nanoseconds > really achievable, say among Linux workstations on a LAN? Not readily. Tens of microseconds is achievable. One issue is the time and time variability of times

Re: [ntp:questions] NTP nanokernel, recent experience, PTP

2010-11-18 Thread Bruce Lilly
On Thu, 18 Nov 2010 18:00:11 +, Miernik, Jerzy (Jerzy) wrote: > 2. Are offsets as small as to be measured in (tens of) nanoseconds > really achievable, say among Linux workstations on a LAN? Not readily. Tens of microseconds is achievable. One issue is the time and time variability of times

[ntp:questions] NTP nanokernel, recent experience, PTP

2010-11-18 Thread Miernik, Jerzy (Jerzy)
Could NTP experts please comment on the following: 1 .Is the NTP nanokernel in widespread use? There seems to be no recent reports on it. 2. Are offsets as small as to be measured in (tens of) nanoseconds really achievable, say among Linux workstations on a LAN? 3. Why would people develop PTP (

[ntp:questions] ANN: UK - Interruption to MSF 60 kHz Time & Frequency Signal - 9 December 2010

2010-11-18 Thread David J Taylor
Folks, I have received this notification: Notice of Interruption to MSF 60 kHz Time and Frequency Signal The MSF 60 kHz time and frequency signal broadcast from Anthorn Radio Station will be shut down over the period: 9 December 2010: from 10: