Date: Thu, 5 Feb 2004 15:10:01 +0100 From: "Cyrille Lefevre" <clefevre-lists@9online.fr> To: "Poul-Henning Kamp" <phk@phk.freebsd.dk> Cc: "current @FreeBSD.org" <freebsd-current@freebsd.org> Subject: Re: wrong kern.boottime Message-ID: <077c01c3ebf1$bef1f700$7890a8c0@dyndns.org> References: <44131.1075987208@critter.freebsd.dk>
next in thread | previous in thread | raw e-mail | index | archive | help
"Poul-Henning Kamp" wrote: > In message <075c01c3ebea$178b36e0$7890a8c0@dyndns.org>, "Cyrille Lefevre" write > s: > > >> >ntpd is running, so, I'm on time. > >> > >> Hmm, I'm not sure where last gets it's number from, maybe from utmp. > > > >no, from wtmp. > > > >> If the utmp record is written on boot before ntpd corrects the clock > >> that would be one explanation... > >> > >> Either way, I'm pretty sure that kern.boottime contains what it should > >> contain: Our best estimate of the time when the system was booted. > > > >absolutely not, the real boot time was the wtmp time which is the same > >as /var/run/dmesg.boot. > > > >a proof of the real boot time : > > > ># bzgrep Accounting /var/log/messages.* > >messages.2.bz2:Feb 1 21:40:43 <kern.notice> gits kernel: Accounting enabled > > This is only a proof if the machine was NTPD'synced at this time. > > If your CMOS clock was a couple of days off, your system would boot with > that time, and not until NTPD gets its act together would the clock > be stepped to the right time. > > This is still the best theory I can come up with. > from /var/log/ntplog, there have been only a correction of less than 2 secs : Feb 1 21:40:43 <ntp.notice> gits ntpdate[9394]: step time server 138.195.130.71 offset 1.880536 sec Feb 1 21:40:47 <ntp.notice> gits ntpd[57196]: ntpd 4.1.1b-a Fri Jan 30 19:17:34 CET 2004 (1) Feb 1 21:40:47 <ntp.notice> gits ntpd[57196]: kernel time discipline status 2040 Feb 1 21:55:00 <ntp.notice> gits ntpd[57196]: time set 0.125300 s Feb 1 22:10:10 <ntp.notice> gits ntpd[57196]: time reset -0.202478 s Feb 1 22:47:45 <ntp.notice> gits ntpd[57196]: time reset 0.276161 s Feb 1 23:02:54 <ntp.notice> gits ntpd[57196]: time reset -0.156614 s Feb 1 23:40:25 <ntp.notice> gits ntpd[57196]: time reset 0.834652 s Feb 1 23:55:47 <ntp.notice> gits ntpd[57196]: time reset -0.531431 s Cyrille Lefevre. -- mailto:clefevre-lists@9online.fr
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?077c01c3ebf1$bef1f700$7890a8c0>