kernel/dmesg misreporting clock speed of CPU

[John T. Yocum]

Hello,

First off, want to say thanks to all the people that make FreeBSD 
possible. Very nice operating system. :) Ok, now for the problem.

Been running FreeBSD 5-STABLE on my Dual Pentium Pro 200Mhz for many 
months now. However, yesterday I upped to 5.4-RC3, and noticed something 
changed during bootup.

This line:

CPU: Pentium Pro (145.59-MHz 686-class CPU)

Note that line says 145.59-Mhz, I have 200Mhz CPUs. As well, prior to 
upgrading to RC-3 that line would say 199.98Mhz. Not sure if that's a 
bug or not.

Here's my dmesg output, wasn't sure if this would be needed:

Copyright (c) 1992-2005 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 5.4-RC3 #3: Wed Apr 20 07:49:53 PDT 2005
     root at koala.publicmx.com:/usr/obj/usr/src/sys/KOALA
MPTable: <HP       LH Pro      >
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Pentium Pro (145.59-MHz 686-class CPU)
   Origin = "GenuineIntel"  Id = 0x619  Stepping = 9
 
Features=0xfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV>
real memory  = 234881024 (224 MB)
avail memory = 224391168 (213 MB)
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
  cpu0 (BSP): APIC ID:  1
  cpu1 (AP): APIC ID:  0
ioapic0: Assuming intbase of 0
ioapic0 <Version 1.1> irqs 0-15 on motherboard
npx0: <math processor> on motherboard
npx0: INT 16 interface
cpu0 on motherboard
cpu1 on motherboard
pcib0: <Host to PCI bridge> pcibus 0 on motherboard
pci0: <PCI bus> on pcib0
pcib1: <PCI-PCI bridge> at device 8.0 on pci0
pci1: <PCI bus> on pcib1
xl0: <3Com 3c905-TX Fast Etherlink XL> port 0xecc0-0xecff irq 9 at 
device 2.0 on pci1
miibus0: <MII bus> on xl0
nsphy0: <DP83840 10/100 media interface> on miibus0
nsphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
xl0: Ethernet address: 00:10:4b:d1:5d:f4
xl1: <3Com 3c905-TX Fast Etherlink XL> port 0xec40-0xec7f irq 10 at 
device 3.0 on pci1
miibus1: <MII bus> on xl1
nsphy1: <DP83840 10/100 media interface> on miibus1
nsphy1:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
xl1: Ethernet address: 00:60:97:c9:af:7b
eisab0: <PCI-EISA bridge> at device 9.0 on pci0
eisa0: <EISA bus> on eisab0
mainboard0: <HWPc141 (System Board)> on eisa0 slot 0
isa0: <ISA bus> on eisab0
ahc0: <Adaptec aic7880 Ultra SCSI adapter> port 0xf800-0xf8ff mem 
0xfedff000-0xfedfffff irq 11 at device 10.0 on pci0
ahc0: Using left over BIOS settings
aic7880: Wide Channel A, SCSI Id=7, 16/253 SCBs
ahc1: <Adaptec aic7880 Ultra SCSI adapter> port 0xf400-0xf4ff mem 
0xfedfe000-0xfedfefff irq 11 at device 11.0 on pci0
ahc1: Using left over BIOS settings
aic7880: Wide Channel A, SCSI Id=7, 16/253 SCBs
orm0: <ISA Option ROMs> at iomem 0xc8000-0xcbfff,0xc0000-0xc7fff on isa0
pmtimer0 on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
fdc0: <Enhanced floppy controller> at port 0x3f0-0x3f5 irq 6 drq 2 on isa0
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
unknown: <PNP0501> can't assign resources (port)
unknown: <PNP0501> can't assign resources (port)
unknown: <PNP0700> can't assign resources (port)
unknown: <PNP0303> can't assign resources (port)
unknown: <PNP0903> can't assign resources (memory)
unknown: <PNP0c02> can't assign resources (memory)
Timecounters tick every 10.000 msec
Waiting 5 seconds for SCSI devices to settle
da0 at ahc0 bus 0 target 0 lun 0
da0: <IBM DXHS18Y 0430> Fixed Direct Access SCSI-3 device
da0: 20.000MB/s transfers (10.000MHz, offset 8, 16bit), Tagged Queueing 
Enabled
da0: 17366MB (35566480 512 byte sectors: 64H 32S/T 17366C)
da1 at ahc0 bus 0 target 1 lun 0
da1: <IBM DXHS18Y 0430> Fixed Direct Access SCSI-3 device
da1: 20.000MB/s transfers (10.000MHz, offset 8, 16bit), Tagged Queueing 
Enabled
da1: 17366MB (35566480 512 byte sectors: 64H 32S/T 17366C)
da2 at ahc0 bus 0 target 3 lun 0
da2: <HP 2.13 GB 1st ### 1221> Fixed Direct Access SCSI-2 device
da2: 20.000MB/s transfers (10.000MHz, offset 8, 16bit), Tagged Queueing 
Enabled
da2: 2033MB (4165272 512 byte sectors: 64H 32S/T 2033C)
SMP: AP CPU #1 Launched!
cd0 at ahc0 bus 0 target 5 lun 0
cd0: <TOSHIBA CD-ROM XM-5401TA 3115> Removable CD-ROM SCSI-2 device
cd0: 4.032MB/s transfers (4.032MHz, offset 15)
cd0: Attempt to query device size failed: NOT READY, Medium not present
Mounting root from ufs:/dev/da0s1a
pflog0: promiscuous mode enabled
xl1: transmission error: 90
xl1: tx underrun, increasing tx start threshold to 120 bytes
xl0: transmission error: 90
xl0: tx underrun, increasing tx start threshold to 120 bytes
xl0: transmission error: 90
xl0: tx underrun, increasing tx start threshold to 180 bytes
xl0: transmission error: 90
xl0: tx underrun, increasing tx start threshold to 240 bytes

Thanks,
John