Re: [ntp:questions] Allan deviation survey

2010-09-11 Thread Maarten Wiltink
"David L. Mills" wrote in message news:4c8b9ab7.2050...@udel.edu... > David Woolley wrote: >> David L. Mills wrote: >>> Running a precision time server on a busy public machine with a >>> widely varying load is not a good idea and I have no interest in >>> that. >> >> As indicated by the sort of

Re: [ntp:questions] Allan deviation survey

2010-09-11 Thread David L. Mills
David, I have no idea where you are coming from. At my feet are two GPS/CDMA time servers running embedded Linux systems. I have two more on campus plus two dedicated Unix machines connected to GPS receivers. NIST has about a dozen dedicated time servers running FreeBSD. USNO has about a doze

Re: [ntp:questions] Allan deviation survey

2010-09-11 Thread David L. Mills
David, With due respect, your comment has nothing to do with the issue. Allan deviation is between a quartz crystal oscillator, timer interrupt, interpolation mechanism and a kerel syscall to read. the clock. It has nothing whatsoever to do with virtual machines. Dave David Woolley wrote:

Re: [ntp:questions] Allan deviation survey

2010-09-11 Thread David Woolley
David L. Mills wrote: I beg to differ. All the machines I used are PCs or similar workstations. They really and truly behave according to an exponential As you note in another reply, you seem to use them in a way that is abnormal for most users of NTP, i.e. as dedicated real machines in wel

Re: [ntp:questions] Allan deviation survey

2010-09-11 Thread David Woolley
David L. Mills wrote: Bill, Running a precision time server on a busy public machine with a widely varying load is not a good idea and I have no interest in that. Running As indicated by the sort of questions the group is getting recently, it is becoming the norm to run time servers on virt