Op 6 dec. 2013, om 09:47 heeft unruh <un...@invalid.ca> het volgende geschreven:
> On 2013-12-06, David Taylor <david-tay...@blueyonder.co.uk.invalid> wrote: >> On 04/12/2013 21:25, Terje Mathisen wrote: >> [] >>> It is very common, IF you are running on Linux! >>> >>> The base frequency is recalculated each time you restart, which means >>> that steps of 100-200 ppm from one reboot to the next can be expected. >>> >>> Terje >> >> I'm surprised to hear of this problem, as I've not been aware of it in >> years of running FreeBSD systems, and in more than a year of running >> (now) five Raspberry Pi Linux systems. Perhaps I've been lucky? As >> they are mainly experimental PCs, the RPi cards are rebooted more than most. >> > > As I said, I think that in the more recent kernels Linux has fixed this. > Since the RPi is only about 2 years old, its linux is a recent kernel. http://www.synclab.org/?tag=raspberry%20pi Quote: The Raspberry Pi does not ship with a TSC or HPET counter to use as clocksource. Instead it relies on the STC that raspbian presents as a clocksource. Based on the source code, "STC: a free running counter that increments at the rate of 1MHz". _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
