Date: Mon, 21 Oct 2002 23:38:26 -0700 (PDT) From: Adida Yoan <yoan.adida@lip6.fr> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/44372: some kernel options prevent NTP clock synchronization Message-ID: <200210220638.g9M6cQdv012283@www.freebsd.org>
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>Number: 44372
>Category: kern
>Synopsis: some kernel options prevent NTP clock synchronization
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Oct 21 23:40:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Adida Yoan
>Release: FreeBSD 4.7-RELEASE i386
>Organization:
>Environment:
FreeBSD localhost 4.7-RELEASE FreeBSD 4.7-RELEASE #0: Fri Oct 18 16:27:02 CEST 2002 root@localhost:/usr/src/sys/compile/PERSO i386
>Description:
When the options HZ=1000 and DEVICE_POLLING are set, the system clock cant synchronize. The ntp configuration is set to use just a single (stratum 2) server. In this configuration, the system clock will drift a lot (about 1 second every 10 NTP "seconds").
>How-To-Repeat:
device fxp
options HZ=1000
options DEVICE_POLLING
binaries and kernel updated by cvsup to
*default release=cvs tag=RELENG_4_7_0_RELEASE
or
*default release=cvs tag=RELENG_4_6_2_RELEASE
Just add the kernel options (i am using fxp but i think the result would be the same with any other device) on any of the above configurations (4.6.2 or 4.7), and run ntp as a client
To checkout the problem do a ntpq -c peer
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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