[ntp:questions] PPM steps vs kernel PPS

2012-02-16 Thread A C
Since I was forced to restart ntpd I decided to play with flag3 now that I have all the statistics being generated. I notced some behavior I don't quite understand. If I have flag3 disabled, I see that the clock adjustment in PPM slews slowly in steps of 0.001 PPM as it tries to keep the cloc

[ntp:questions] clockstats pausing during ntpq poll

2012-02-16 Thread A C
As part of my testing I'm observing the main log, peers, loops, and clockstats in one window while I observe ntpq (running on a different machine) polling the server every five seconds. The PPS refclock has flag4 set so that clockstats are recorded. What I've noticed is that normally the cloc

Re: [ntp:questions] Using a uC based embedded device as SNTP server

2012-02-16 Thread Richard B. Gilbert
On 2/16/2012 4:52 AM, Thorsten Mühlfelder wrote: Hello, I've already posted these questions 8 months ago without answers, but now the problem came to my mind again. Sorry for double post. I'm using a Atmel uC embedded device as SNTP server. The code is working so far, but I wonder what the corr

Re: [ntp:questions] Purpose of a leap second file?

2012-02-16 Thread Dave Hart
On Thu, Feb 16, 2012 at 20:43, A C wrote: > PS  time.nist.gov/pub has a leapsecond file now.  I just downloaded it. Thanks for the correction. The machine I was testing suffered disconnection on every attempt after the banner identifying the FTP software. Turns out it's due to the specific NAT

Re: [ntp:questions] Using a uC based embedded device as SNTP server

2012-02-16 Thread David Woolley
David Woolley wrote: 35ms/second of uptime, plus the results of the standard computation for That should have been micro seconds per second, not milli-seconds per second. ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/list

Re: [ntp:questions] Using a uC based embedded device as SNTP server

2012-02-16 Thread David Woolley
Thorsten Mühlfelder wrote: In my understanding my server is a stratum 1 with reference identifier LOCL. Also I chose reference timestamp as last time correction by SNTP. Is this correct? Strictly speaking it is an invalid SNTP server as SNTP clients are not allowed to be SNTP servers (the sta

Re: [ntp:questions] how do I lock in average frequency correction

2012-02-16 Thread Terje Mathisen
Dennis Ferguson wrote: On 15 Feb, 2012, at 22:53 , Terje Mathisen wrote: I do like your approach. :-) Thanks. This was arrived at when I acquired hardware which allowed the system clock to be measured against an external reference with an accuracy in the very low 10's of nanoseconds and foun

Re: [ntp:questions] Purpose of a leap second file?

2012-02-16 Thread A C
On 2/16/2012 05:43, Dave Hart wrote: On Thu, Feb 16, 2012 at 07:25, David J Taylor wrote: Ah, I found the instructions about using the file: http://support.ntp.org/bin/view/Support/ConfiguringNTP#Section_6.14. I've updated that section to give a few more details. Very helpful, thank you

Re: [ntp:questions] how do I lock in average frequency correction

2012-02-16 Thread Dennis Ferguson
On 15 Feb, 2012, at 22:53 , Terje Mathisen wrote: > Dennis Ferguson wrote: >> I have had very good results with the following procedure. If `tc' >> is the 64 bit output of a counter which is continuously incremented >> at the rate of some oscillator then the time can be computed as follows: >>

Re: [ntp:questions] adding access restrictions to the windows ntp config

2012-02-16 Thread E-Mail Sent to this address will be added to the BlackLists
David Lord wrote: > Noquery prevents ntpq requests rather than time requests. I guess I was thinking of noserve. -- E-Mail Sent to this address will be added to the BlackLists. ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org

Re: [ntp:questions] Purpose of a leap second file?

2012-02-16 Thread David J Taylor
"Dave Hart" wrote in message news:cambsiydga1nk8kjlwfg9bdl+ih0ccndjujk1-a_gfdjfvbr...@mail.gmail.com... On Thu, Feb 16, 2012 at 07:25, David J Taylor wrote: Ah, I found the instructions about using the file: http://support.ntp.org/bin/view/Support/ConfiguringNTP#Section_6.14. I've updated

Re: [ntp:questions] Using a uC based embedded device as SNTP server

2012-02-16 Thread Dave Hart
2012/2/16 Thorsten Mühlfelder : > Hello, > > I've already posted these questions 8 months ago without answers, but > now the problem came to my mind again. Sorry for double post. > > I'm using a Atmel uC embedded device as SNTP server. The code is > working so far, but I wonder what the correct set

Re: [ntp:questions] Purpose of a leap second file?

2012-02-16 Thread Dave Hart
On Thu, Feb 16, 2012 at 07:25, David J Taylor wrote: > Ah, I found the instructions about using the file: > >  http://support.ntp.org/bin/view/Support/ConfiguringNTP#Section_6.14. I've updated that section to give a few more details. > I had the impression, falsely, from the way people were talk

[ntp:questions] Using a uC based embedded device as SNTP server

2012-02-16 Thread Thorsten Mühlfelder
Hello, I've already posted these questions 8 months ago without answers, but now the problem came to my mind again. Sorry for double post. I'm using a Atmel uC embedded device as SNTP server. The code is working so far, but I wonder what the correct settings are for: * stratum * precision * root