Typically the way you deal with not having a usably cheap
nanosecond-resolution clock is that you use the best available clock
(say if HZ=1000 you'll increment by 1000000 each timer tick), and then
simply use an atomic counter for the smaller divisions. This makes
the relation "is A newer than B" correct, while avoiding the overhead
of producing exact timestamps below the available resolution.
-hpa
-- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/