Re: [ntp:questions] rackety

2009-07-26 Thread David Mills
Danny, If you looked more closely, you would have discovered rackety was within a few microseconds of the PPS time; however, the GPS receiver timecode suddenly jumped 2 ms from nominal and that exceeded the intersection window. This demonstrates the zeal of cross checking the PPS and timecode

Re: [ntp:questions] Local (own site) NTP servers.

2009-07-26 Thread Richard B. Gilbert
Uwe Klein wrote: David Woolley wrote: G8KBV wrote: http://bifferos.bizhat.com/ Since when has Intel architecture been reduced instruction set. Looks like someone's marketing department has completely devalued RISC! Thats a nice and cheap toy. ( thanks for the hint G8KBV David,

Re: [ntp:questions] NTP Performance on WINNT

2009-07-26 Thread paul
On Jul 26, 12:30 am, David J Taylor david-tay...@blueyonder.not- this-part.nor-this.co.uk.invalid wrote: paul wrote: [] Thanks, but I mean something which do not rely on the output of ntpq.exe. My NTP Monitor uses NTP network calls to determine the offset of the PCs - it doesn't use

Re: [ntp:questions] NTP Performance on WINNT

2009-07-26 Thread paul
Although you might be able to drive a real (non-USB) parallel port, from application code, with fairly low latency the results would only be meaningful for a very unloaded machine, as, on a loaded machine, you wouldn't really know where you where in the system tick interval, when you read the

Re: [ntp:questions] NTP Performance on WINNT

2009-07-26 Thread David J Taylor
paul wrote: On Jul 26, 12:30 am, David J Taylor david-tay...@blueyonder.not- [] What problem are you trying to solve, and how accurately do you need to measure? I'm just not so sure if I can absolutely count on ntpq to determine time offset of NTP synced machines... Good question, which I

Re: [ntp:questions] NTP Performance on WINNT

2009-07-26 Thread Unruh
paul chaofu.c...@gmail.com writes: On Jul 26, 12:30=A0am, David J Taylor david-tay...@blueyonder.not- this-part.nor-this.co.uk.invalid wrote: paul wrote: [] Thanks, but I mean something which do not rely on the output of ntpq.exe. My NTP Monitor uses NTP network calls to determine the

Re: [ntp:questions] NTP Performance on WINNT

2009-07-26 Thread David Woolley
Unruh wrote: You can absolutely count on ntpq to tell you what ntp thinks the offset is based on its querying of the servers or refclocks. What makes you not so sure. I don't think he wants the NTP offset metric; I think he wants the difference between software clock time and true UTC.

Re: [ntp:questions] Local (own site) NTP servers.

2009-07-26 Thread David Woolley
Richard B. Gilbert wrote: ISTR reading that the Intel 80x86 line was CISC on top and RISC underneath. I couldn't swear to it though. All I ever saw or worked with was the CISC part of it. I think that pretty much defines CISC. CISC machines are normally micro-program driven machines.

Re: [ntp:questions] NTP Performance on WINNT

2009-07-26 Thread Steve Kostecke
On 2009-07-26, paul chaofu.c...@gmail.com wrote: On Jul 26, 12:30 am, David J Taylor david-tay...@blueyonder.co.uk wrote: What problem are you trying to solve, and how accurately do you need to measure? I'm just not so sure if I can absolutely count on ntpq to determine time offset of NTP