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Date:      Thu, 30 Dec 2004 11:32:44 -0800
From:      Brooks Davis <brooks@one-eyed-alien.net>
To:        David Talkington <dtalk@u.washington.edu>
Cc:        Federico Galvez-Durand Besnard <Federico.Besnard@bluewin.ch>
Subject:   Re: clock running fast
Message-ID:  <20041230193244.GB2987@odin.ac.hmc.edu>
In-Reply-To: <20041230110953.T17743@atlantis.flyingjoke.org>
References:  <41D43A7A.2000500@bluewin.ch> <20041230110953.T17743@atlantis.flyingjoke.org>

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[Please don't top post].

On Thu, Dec 30, 2004 at 11:13:55AM -0800, David Talkington wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>=20
> Federico Galvez-Durand Besnard wrote:
>=20
> >what do you have in :
> >/etc/ntp.conf
>=20
> Only:
>=20
> server 		time.u.washington.edu
> server          127.127.1.0=20
> fudge           127.127.1.0 stratum 10
>=20
>=20
> Command line:
>=20
> /usr/sbin/ntpd -c /etc/ntp.conf -p /var/run/ntpd.pid \
> - -f /var/db/ntpd.drift

It's generally recommended that you never trust your own clock since
it's completely crap as time sources go.  It's also recommended that you
use at least 5 time sources to avoid problems with bad clocks.

-- Brooks

> >-----BEGIN PGP SIGNED MESSAGE-----
> >Hash: SHA1
> >
> >
> >Salutations --
> >
> >I have an old board with an installation of STABLE whose time keeps=20
> >running away.  ntpd is not helping.  I can manually set the time using=
=20
> >ntpdate, and my ntpq queries look fine, yet the clock persists in runnin=
g=20
> >very fast (seems to be about 1.5x speed).  The BIOS clock remains correc=
t,=20
> >and the machine therefore has the correct time at each reboot, but quick=
ly=20
> >runs away.
> >
> >Data points:
> >
> >- - I have set kern.timecounter.hardware=3DTSC, and this has not helped.=
 - -=20
> >Two other hosts on the same network, using the same ntp server, do not=
=20
> >have this problem.
> >- - This box did not display this behavior under FreeBSD 5.2. - - I have=
=20
> >replaced the board on the problem box (with the same age and type), and=
=20
> >the problem persists.
> >- - dmesg for this machine, an old Dell Optiplex 590, is below.
> >
> >What other information might help diagnose the problem?
> >
> >Thank you ... -d
> >
> >- --
> >David Talkington
> >dtalk-ml at prairienet.org=20
> ><http://lists.freebsd.org/mailman/listinfo/freebsd-stable>;
> >
> >
> >
> >_______________________________________________
> >freebsd-stable@freebsd.org mailing list
> >http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> >To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
> >
> >
>=20
> - --=20
> David Talkington
> Computing and Communications
> University of Washington
> 206-543-2144
> - --
> dtalk@u.washington.edu
> - --
> PGP key: http://staff.washington.edu/dtalk/004B8F8B.asc
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> _______________________________________________
> freebsd-stable@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
--=20
Any statement of the form "X is the one, true Y" is FALSE.
PGP fingerprint 655D 519C 26A7 82E7 2529  9BF0 5D8E 8BE9 F238 1AD4

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