Re: [ntp:questions] how to write a reference clock driver

Hello, Harlan Stenn schrieb: >>>> In article <4948f81b$0$29004$9b622...@news.freenet.de>, Juergen Kosel >>>> writes: > > And I also don't understand what you mean by "computing time is a concern". > Is the overhead of a subroutine call that

Re: [ntp:questions] how to write a reference clock driver

Hello, Harlan Stenn schrieb: >>>> In article <4944eab4$0$12693$9b622...@news.freenet.de>, Juergen Kosel >>>> writes: > > Juergen> Hello, Greg Dowd schrieb: >>> I'm not quite sure what you mean. A reference clock doesn't compute an >

Re: [ntp:questions] how to write a reference clock driver

Hello, Greg Dowd schrieb: > I'm not quite sure what you mean. A reference clock doesn't compute an > offset, it acquires, formats and returns a time value from an external > source. NTP takes care of the rest. ntpd reads the time of a reference clock with a reference clock driver. My problem wa

[ntp:questions] how to write a reference clock driver

Hello, I have a system with hardware support for PTP (IEEE 1588 time synchronisation) [ http://en.wikipedia.org/wiki/Precision_Time_Protocol ]. So the system can read from two 32 bit registers seconds and nanoseconds since 1.1.1970. It appears like the system time, but is n't the system time. To s