No, you probably cannot get ±1 µs with any kind of software solution
in this environment. The dispersion is simply going to kill you ("the
times can vary depending upon contention" is the deadly phrase.) NTP
is very good, but there are things it just can't do. I suspect you
will be able to get about ±200 µs with NTP in this environment without
trying, and can probably shake it down to ±50 µs with a well-designed
tree.
Incidentally, you probably want your primary source of time to be at
least an order of magnitude more precise than you want your clients.
±100 ns GPS clocks are standard issue these days, so it shouldn't be a
problem.
-hpa
-- PGP: 2047/2A960705 BA 03 D3 2C 14 A8 A8 BD 1E DF FE 69 EE 35 BD 74 See http://www.zytor.com/~hpa/ for web page and full PGP public key I am Bahá'í -- ask me about it or see http://www.bahai.org/ "To love another person is to see the face of God." -- Les Misérables- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/