On 2008-08-13, John Bartas <[EMAIL PROTECTED]> wrote: > Hi Folks, > > I have some questions about when (if ever) NTP will set time backward. > I'll be using it on Embedded Linux for time stamping video frames. > > I've found several mentions in RFC 1305 that this should not happen, and > also in section "Step Phase Adjustments" mention that it can jump > backwards.
ntpd has a default step threshold of 128ms. When the offset does not exceed this threshold the clock is slewed. When the offset exceeds this threshold the clock is stepped. > Is there a simple description anywhere if what variables affect this, > and how? I'd like to know when it's going to jump backwards on Linux - > what the rules are and what control I have over it. The ntpd manual page, http://www.eecis.udel.edu/~mills/ntp/html/ntpd.html (dev release) or http://doc.ntp.org/4.2.4/ntpd.html (stable release), provides a description of now NTP works. Start at the "How NTP Operates" section. -- Steve Kostecke <[EMAIL PROTECTED]> NTP Public Services Project - http://support.ntp.org/ _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
