Date: Mon, 07 Jun 1999 10:51:33 +0300 From: "Andy V. Oleynik" <andyo@prime.net.ua> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: question regarding 3.1-stable and drifting time clock. Message-ID: <375B7A05.6E0C33DD@prime.net.ua> References: <Pine.BSF.4.03.9906041047430.12183-100000@resnet.uoregon.edu>
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I've expirienced same behavor with 2 new 3.2-S boxes. last is 4th June installed from ukrainian ftp. I'm sure its not a hardware. This is pieces from dmesg. Both are accurate for CPUs we have: Timecounter "i8254" frequency 1193182 Hz Timecounter "TSC" frequency 90040066 Hz Timecounter "i8254" frequency 1193182 Hz Timecounter "TSC" frequency 74539404 Hz And as far as I realized there is still no workeround? Doug White wrote: > 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 -- WBW Andy V. Oleynik (When U work in virtual office U have good chance to obtain virtual money ö%-) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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