> Jan 22 07:15:48 dobby ntpd[51979]: kernel time sync status change 6001 > Jan 22 07:50:10 dobby ntpd[51979]: kernel time sync status change 2001 > Jan 22 11:00:35 dobby ntpd[51979]: kernel time sync status change 6001 > Jan 22 11:49:04 dobby ntpd[51979]: kernel time sync status change 2001 > Jan 22 13:48:35 dobby ntpd[51979]: kernel time sync status change 6001 > Jan 22 14:56:56 dobby ntpd[51979]: time reset -0.141398 s > Jan 22 15:00:44 dobby ntpd[51979]: kernel time sync status change 2001 > Jan 22 18:53:31 dobby ntpd[51979]: time reset -0.154392 s > Jan 22 22:36:22 dobby ntpd[51979]: time reset -0.147822 s > Jan 23 04:30:08 dobby ntpd[51979]: time reset -0.129208 s > Jan 23 10:37:47 dobby ntpd[51979]: time reset +0.159964 s > > Any help or advice would be useful. Nothing really changed on my > system around the time of the wonkiness, but on another machine on the > network, I did start using bittorrent (Transmission 1.50b1). It's > setting are such that it isn't making more than a dent in my network > traffic. But it's only serving about 10 peers, so I don't see how it > could be confusing my router.
As shown by the log at pool.ntp.org (http://www.pool.ntp.org/scores/72.64.118.118/log?limit=50), your time server sometimes gives out time responses off by around 100-200ms. The log file is just showing that NTP is recognizing those inaccuracies (or, possibly, recognizing things that aren't inaccuraciess, so incorrecting the time) and stepping the clock to fix it (NTP by default only steps the clock when the clock is more than 128ms wrong). This could be caused by many things, but it's likely just BitTorrent uploads causing congestion causing high ASYMETRIC network latency and jitter. Throttle the upload to something well under your maximum upload and see if the problem goes away. Low-bandwidth, poor-quality connections like ADSL are poorly suited to services such as NTP, especially if they're pushing a significant amount of traffic. Shaping may help (basically, you want to avoid many packets getting queued (so you throttle on your router below the speed of the modem), and prioritize time over almost all other traffic, so that *hopefully* those packets won't get delayed significantly) _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
