Re: [ntp:questions] Idea to improve ntpd accuracy

2016-02-27 Thread Leon McCalla
I've been monitoring this thread for a while and i have a few comments. 1) I think on average the TX queue delay inside an ethernet card is going to be way smaller than the delay observed on the general internet. NTPd's primary algorithms compensate really well for jitter and delay already so the

Re: [ntp:questions] Idea to improve ntpd accuracy

2016-02-27 Thread Hal Murray
> I thought of that too but rejected it as way too machine-specific. Because > the clock PLL does not track frequency ramps feed-forward could be very > effective (e.g. order of magnitude). To make this work however, you need to > first discover which one of many potential temperature sensors

[ntp:questions] Fwd: Re: [ntpwg] Idea to improve ntpd accuracy

2016-02-27 Thread Weber
Thank you to all who replied to my inquiry! Regarding required accuracy...there really is none in my case. It's just a matter of "how good can this get?" However, the results may be of actual use to others, just not me. I have gone to the effort of implementing the interleaved symmetric mode

Re: [ntp:questions] Idea to improve ntpd accuracy

2016-02-27 Thread Weber
Holy cow! I thought of that too but rejected it as way too machine-specific. Because the clock PLL does not track frequency ramps feed-forward could be very effective (e.g. order of magnitude). To make this work however, you need to first discover which one of many potential temperature senso

Re: [ntp:questions] Idea to improve ntpd accuracy

2016-02-27 Thread Brian Inglis
If you have Windows/Linux on Intel/AMD mobos, try OpenHardwareMonitor on Windows with .NET 2+ and Linux with Mono and Winforms: http://openhardwaremonitor.org/documentation/ and https://github.com/openhardwaremonitor/openhardwaremonitor.git -- Take care. Thanks, Brian Inglis, Calgary, Alberta,

Re: [ntp:questions] Idea to improve ntpd accuracy

2016-02-27 Thread Charles Elliott
Here are two other ideas you might want to consider to improve accuracy: Feed forward (PID) control on system temperature and significant changes in system load. Let me describe the situation. Right now I have only 3 computers on a home LAN. Two, one of which is my main system for email and dict