clock runs very fast on 5.1R

[kanematsu]

Clock on my server runs very fast.  It is about twice faster, 

and I think it is not good for a server.  I'm running 5.1R.  

The problem did not occur under 4.4R, 4.7R, or 4.8R 

on the same PC.  I know FreeBSD doesn't read time 

from CMOS Clock.  Right after rebooting the machine, 

date command shows me a correct time because of 

xntpd in rc.conf.  The PC has AMD 350 MHz IBM Aptiva.  

I pasted information of Timercounter “i8254” and “TSC” 

from dmesg.today below.

 

Copyright (c) 1992-2003 The FreeBSD Project.

Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994

            The Regents of the University of California. All rights reserved.

FreeBSD 5.1-RELEASE #15: Thu Nov 20 00:54:10 EST 2003

    root at abc.abc.com:/usr/src/sys/i386/compile/KERNELABC

Preloaded elf kernel "/boot/kernel/kernel" at 0xc043c000.

Preloaded elf module "/boot/kernel/acpi.ko" at 0xc043c1cc.

Timecounter "i8254"  frequency 1193182 Hz

Timecounter "TSC"  frequency 349180042 Hz

CPU: AMD-K6(tm) 3D processor (349.18-MHz 586-class CPU)

 

I added each line below on my kernel and configured as someone 

suggested me but it didn’t work. 

 

#options CLK_USE_TSC_CALIBRATION  

 

#options TIMER_FREQ=2359004

 

#options CLK_USE_i8254_CALIBRATION   

 

Also, someone suggested me that I might modify clock.c file in 

/usr/src/sys/i386/isa/  but I didn’t know how to modify it.

 

Does anyone have any idea or know where should I ask?





Kanematsu