Re: [ntp:questions] Dual Mixer Time Difference (DMTD) instruments sought

2008-05-15 Thread jlevine
Hello, While it's unlikely that I will soon get to build such an instrument, I am quite interested in how they are built, if only to understand what can happen and why.  Can you suggest some articles and/or books and/or patents delving into both the theory and the practicalities of building

[ntp:questions] Power-saving patch to NTP

2008-05-15 Thread Jan Ceuleers
I came across the following page: http://www.lesswatts.org/projects/powertop/known.php which says the following on ntpd: By default, the ntp time synchronization daemon will wake up once per second, and will make the kernel do work on it's behalf even more. Red Hat has created a patch to ntp

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

2008-05-15 Thread David L. Mills
Jan, A timer interrupt is required each second to update the clock frequency no matter what. In addition, a sweep is made through the associations to see if a poll is pending. It would be in principle posssible to implement a system of queues to avopid sweeping the associations each second,

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

2008-05-15 Thread Bill Unruh
David L. Mills [EMAIL PROTECTED] writes: Jan, A timer interrupt is required each second to update the clock frequency no matter what. In addition, a sweep is made through the associations to I thought that the ntp daemon runs the per second routine only if the kernel discipline is not