Unruh wrote: > clock, and how much is inherent I do not know. But since the clock on Linux > is 1usec quantization and the accuracy of my gps is 1 usec, I figure this > is about as good as it gets. I doubt that you can get consistant reading of > the cpu clock even from the kenrel to better than about 1us, whether on > linux or on BSD.
Famous last words? :-) PHK has setup several FreeBSD-based refclocks that measure out well below the 1 us level, i.e. take a look at: http://people.freebsd.org/~phk/ A quote from that page: "Current status is that I can track my GPS receiver into a band less than 150 nsec wide around true UTC. This is an order of magnitude better than any other UNIX system I know of. My performance is probably even better than that, but I have not had much chance to validate it yet." Terje -- - <[EMAIL PROTECTED]> "almost all programming can be viewed as an exercise in caching" _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
