On 31Mar2008 16:21, Konstantin Svist <fry.kun@xxxxxxxxx> wrote: > Is there a good ["Fedora"] way to keep time synchronized on a laptop? > I've checked around and ntpd seems to be a bad idea because it counts > CPU cycles - but modern CPUs switch frequencies all the time to save > power. Some tutorials say this causes NTP to not work properly. Ntpd is the normal way. Why not try it out? Ntpd (and any ntp daemon in general) does watch "drift", to keep an idea of the discrepancy between your system clock and a correct clock, and uses it the schedule time checks and general correction. I do not have much knowledge about how CPU speed changes affect ntpd but I would have thought: not much! The OS is supposed to keep "correct" time (subject to drift) across these changes and no normal UNIX program counts CPU cycles - in a multitaksing OS there's no guarentee of how much CPU your getting anyway and on a modern CPU "cycles" are a loose and dodgy idea anyway. Ntpd _should_ be looking at the system clock periodically, not counting CPU cycles. I suspect you will find ntpd works pretty well. -- Cameron Simpson <cs@xxxxxxxxxx> DoD#743 http://www.cskk.ezoshosting.com/cs/ There are two excuses for poor proof-reading. The first is incompetence, for which the author should be killfiled. The second is indifference, for which the author should be killed. - Dan Hillman <dcah100@xxxxxxxxxxxxx>
