Re: [ntp:questions] NTP phase lock loop inputs and outputs?

2008-05-20 Thread David Woolley
Unruh wrote: I do not understand this. You seem to be measuring the offsets, not the frequencies. The offset is irrelevant. What you want to do is to measure Measuring phase error to control frequency is pretty much THE standard way of doing it in modern electronics. It's called a phase

Re: [ntp:questions] Power-saving patch to NTP

2008-05-20 Thread Martin Burnicki
Uwe Klein wrote: Martin Burnicki wrote: Agreed. However, you can at least configure the dynamic interface scan interval using the -U parameter, so you can decide if you prefer short response times or a longer response time with maybe decreased power requirements. push a trigger for this into

Re: [ntp:questions] NTP phase lock loop inputs and outputs?

2008-05-20 Thread Unruh
David Woolley [EMAIL PROTECTED] writes: Unruh wrote: I do not understand this. You seem to be measuring the offsets, not the frequencies. The offset is irrelevant. What you want to do is to measure Measuring phase error to control frequency is pretty much THE standard way of doing it in

Re: [ntp:questions] Power-saving patch to NTP

2008-05-20 Thread Garrett Wollman
In article [EMAIL PROTECTED], Martin Burnicki [EMAIL PROTECTED] wrote: AFAIK ntpd has to manage the binding to interfaces at least if autokey is enabled since the signature hash also includes the IP address of the interface via which a packet is sent. At least some operating systems (don't know

Re: [ntp:questions] NTP phase lock loop inputs and outputs?

2008-05-20 Thread David L. Mills
Bill, If you need only the frequency, least-squares doesn't help a lot; all you need are the first and last points during the measurement interval. The NIST LOCKCLOCK and nptd FLL disciplines compute the frequency directly and exponentially average successive intervals. The NTP discipline is

Re: [ntp:questions] Power-saving patch to NTP

2008-05-20 Thread David Woolley
Uwe Klein wrote: David Woolley wrote: Evandro Menezes wrote: HLT instructions are a complete red herring here. They've been available Modern CPUs, chipsets and OSes have a wide range of features to manage I'm aware of that. power _and_ these are heavily used on any platform, be it PDA,