"David Woolley" <da...@ex.djwhome.demon.invalid> wrote in message news:hfgvt5$g6...@news.eternal-september.org... > David J Taylor wrote: > >> Stated requirement: >> >> - around 1 millisecond (on Window 2000 or XP IIRC). >> >> Observed performance examples: > > These don't tell you the jitter due to the scheduling of the application > program and interrupt latencies from the real world events to the point > where the code tries to read the time.
Of course the application has to be well-designed and use appropriate interactions with the OS - that goes without saying. NTP can measure better than a millisecond on Windows. As the application is an existing Windows one, the OS is fixed, and the challenge is then to provide the best timekeeping within the imposed constraints. Cheers, David _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
