On Feb 1, 9:09 am, ma...@ntp.isc.org (Danny Mayer) wrote: > Dave Hart wrote: > > I didn't say no one ever uses timeBeginPeriod to raise the multimedia > > timer precision on a server. I said it is reasonable to know a > > particular server will not run any software which raises the > > multimedia timer precision. If, on the other hand, you know you do > > use such software, or you can't be sure what software will be run, -M > > with the experimental ntpd is wise with Vista and WS2008. > > No, that's not correct. You cannot make any assumptions whatsoever as to > what the system may be running.
I most certainly can make assumptions about what my system may be running, your orders notwithstanding. > It is a fallacy to assume that any admin > or user will have any idea what any applications will be doing with the > multimedia timer or any other code that affects the clock. BS. I know exactly what runs on my servers, and alone decide. I am an admin or user. Your blanket assertion is wrong. If they don't know, the safe choice (and the Meinberg installer's default) is to use -M. > Furthermore > as new applications get deployed with as a pure user application or as a > server application you have no idea what its requirements might be. ntp > is founded on the principal that the system clock needs to be correct no > matter what the system or network is or is not doing. Run with -M. > I don't have the time right now to analyze your changes but you need to > ensure that this works on a large variety of systems in a large variety > of environments. As I've stated repeatedly, it's better than what we have now. Now interpolation is used unconditionally. With my change, it is avoided if the scenario that breaks it is detected (fine-grained system clock). On Vista and later, with -M, it always detects that breakage and disables interpolation. There is no regression, only forward progress. Cheers, Dave Hart _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions