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Date:      Wed, 23 May 2001 11:39:14 -0400
From:      Vivek Khera <khera@kcilink.com>
To:        questions@freebsd.org
Subject:   Re: how to improve a bad timekeeper
Message-ID:  <15115.55714.923104.643290@onceler.kciLink.com>
In-Reply-To: <20010523101144.C6091@billygoat.slb.to>
References:  <15115.53325.566433.473253@onceler.kciLink.com> <20010523101144.C6091@billygoat.slb.to>

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>>>>> "LB" == Lucas Bergman <lucas@slb.to> writes:

>> I have one 4.3-STABLE box that is a really bad timekeeper.  ntpd has
>> a hard time keeping it in line.  Often offset is high, and I see
>> loss of synchronization frequently.
>> 

LB> How much drift is this?  Is it off by 0.7..1.4 seconds per year? day?
LB> hour?

Something like every 20 minutes.

grep ntp /var/log/messages says this:

May 23 10:12:32 lorax ntpd[23862]: time reset -2.848319 s
May 23 10:33:39 lorax ntpd[23862]: time reset -2.532815 s
May 23 10:53:19 lorax ntpd[23862]: time reset -2.440872 s
May 23 11:14:38 lorax ntpd[23862]: time reset -2.573073 s
May 23 11:34:10 lorax ntpd[23862]: time reset -2.510191 s

That's pretty darned bad...  it takes about 10 minutes for ntp to sync
up after such an event.

>> Are there any other things I can try to get this machine to keep
>> better time?

LB>   http://cr.yp.to/clockspeed.html

Looks helpful.  Thanks for the pointer... This DJB fellow sure does
write a heck of a lot of stuff! ;-)

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