2011/9/26 Miguel Gonçalves <[email protected]>: > 2011/9/26 Dave Hart <[email protected]> >> 2011/9/25 Miguel Gonçalves <[email protected]>: >> > I have a machine running FreeBSD 7.4 and it seems that the CPU clock >> > runs >> > too fast or slow (positive offset in loopstats is fast or slow?). >> >> ntpd's offset and the frequency compensation are both reported as >> corrections to the local clock to bring it into alignment with the >> source(s). So a positive offset means the clock is behind correct, >> and a positive frequency correction means the clock runs slower than >> correct. > > Thanks for all your support to reach a solution for this problem! > > I found out that 180 ppm were the result of the CPU running too fast because > if I increased the CPU frequency by 180 ppm I would get a even higher > offset. Am I wrong? It seems I solved the problem as I showed in my previous > post.
I think you're simply confused. The FreeBSD sysctl you modified isn't adjusting the TSC frequency. It's adjusting FreeBSD's estimate of the TSC frequency. I stand by my understanding that a positive frequency compensation reported by ntpd means the clock's uncompensated rate is slow. Cheers, Dave Hart _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
