Date: Fri, 4 Jun 1999 10:52:18 -0700 (PDT) From: Doug White <dwhite@resnet.uoregon.edu> To: Oliver Stockhammer <oliver@inch.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: question regarding 3.1-stable and drifting time clock. Message-ID: <Pine.BSF.4.03.9906041047430.12183-100000@resnet.uoregon.edu> In-Reply-To: <Pine.BSF.4.05.9906021700210.26610-100000@shell.inch.com>
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On Wed, 2 Jun 1999, Oliver Stockhammer wrote: > > Hello, > I am running 3.1-stable on a Pentium 90. I get a wicked time > drift, something like 5 minutes fast every hour. It is not my bios clock > as that is keeping correct time (it is set to UTC). You too, eh? When you boot up, you should get a line like: Timecounter "TSC" frequency 100228262 Hz What does it report for the freq? Something is up with the 3.X TSC calibration and it causes timewarping clocks. I am running xntpd to > attempt to stop this and it is locally synching to another FBSD box which > is keeping accurate time. I have run tzsetup and set it to UTC as well > with EDT as the timezone. > When xntpd starts up it seems to be fine: > > Jun 2 16:10:37 ary xntpd[106]: xntpd version=3.4e (beta multicast); > Mon Feb 15 10:12:13 GMT 1999 (1) > Jun 2 16:10:37 ary xntpd[106]: tickadj = 5, tick = 10000, > tvu_maxslew = 495 > > But upon inspection of the time about an hour later, the clock has > drifted again 5 minutes fast and continues to drift about 5 minutes/hour. > There is no other logging in /var/log/messages from xntpd after > starting it. xntpd can slew it only so much. I'm trying xntpd on another problem box but I'm not sure it can keep up. > If I restart the machine and check the bios it is correctly set to > UTC and the accurate time. Is this a bug with 3.1-stable or am I missing > something? I'm not sure if this is due to flaky PC hardware or if it's an actual bug. Our P90 thinks it's a P87.5. I think I'll enter a PR on it to get the ball rolling. Doug White Internet: dwhite@resnet.uoregon.edu | FreeBSD: The Power to Serve http://gladstone.uoregon.edu/~dwhite | www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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