----- Original Message ----- > From: "Keith Medcalf" <kmedc...@dessus.com>
> > Are you suggesting that NTP timekeeping should be based on UT1? > > The system clock should be based on UT1 and should be monotonically > increasing since this matches the common concept of time. Calculations > done with this value are all based on it being UT1 and using the > "common" notion of UT1 rules. The root cause of the difficulties is > that someone decided that the system clock would not maintain "wall > clock" time (UT1) but rather some other timebase and then "step" that > time to keep it in sync with UT1. UTC is monotonic, and is based on UT1. Just not deterministically. :-) The root cause *is* that someone made a bad decision about kernel timekeeping, but it wasn't the choice of timescale. Non-monotonic time is not a feature of UTC *either*. > NTP can keep time in UTC (or anything else) if it wants, but it should > discipline the system clock to monotonically increasing UT1. As I undertstand it, the problem is not how NTP disciplined the kernel, it's what the kernel does itself. Cheers, -- jra -- Jay R. Ashworth Baylink j...@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274
