Date: Mon, 1 May 2000 21:17:47 -0400 From: "Rick Siple" <rick.siple@worldnet.att.net> To: <freebsd-questions@freebsd.org> Subject: Unstable Timecounter? Message-ID: <000501bfb3d4$da767c20$0200000a@impulse>
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I am having some trouble with a older computer with a P90 overdrive chip
in it. The kernel clock seems to be running fast. I rebooted the computer
to reset the CMOS clock, but it was correct. I checked the dmesg logs and
found that the messages about the TSC counter reported a different frequency
every time the computer was rebooted. The other counter, i8254, seems to be
stable.
Is this problem fixable or is the hardware bad?
Thanks for any assistance.
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log excerpts
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Mar 1 16:52:00 istest1 /kernel: Timecounter "TSC" frequency 180410017 Hz
Mar 8 08:55:16 istest1 /kernel: Timecounter "TSC" frequency 158760415 Hz
Mar 10 17:32:42 istest1 /kernel: Timecounter "TSC" frequency 155152435 Hz
Mar 14 15:38:40 istest1 /kernel: Timecounter "TSC" frequency 150542944 Hz
Mar 15 15:47:19 istest1 /kernel: Timecounter "TSC" frequency 173193367 Hz
Mar 23 10:26:08 istest1 /kernel: Timecounter "TSC" frequency 169585097 Hz
Mar 23 10:28:47 istest1 /kernel: Timecounter "TSC" frequency 155152319 Hz
Mar 23 10:36:34 istest1 /kernel: Timecounter "TSC" frequency 155152289 Hz
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dmesg output
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Copyright (c) 1992-1999 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 3.4-STABLE #0: Thu Mar 23 18:04:11 EST 2000
rick@istest1.mpainc.com:/usr/src/sys/compile/ISTEST1
Timecounter "i8254" frequency 1193182 Hz
Timecounter "TSC" frequency 155152277 Hz
CPU: Overdrive Pentium/P55C (155.15-MHz 586-class CPU)
Origin = "GenuineIntel" Id = 0x1543 Stepping = 3
Features=0x8001bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,MMX>
real memory = 16777216 (16384K bytes)
config> di psm0
config> q
avail memory = 13832192 (13508K bytes)
Preloaded elf kernel "kernel" at 0xc02b5000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc02b509c.
Probing for devices on PCI bus 0:
chip0: <Intel 82434NX (Neptune) PCI cache memory controller> rev 0x11 on
pci0.0.
0
chip1: <Intel 82378ZB PCI to ISA bridge> rev 0x03 on pci0.2.0
ahc0: <Adaptec 2940 SCSI adapter> rev 0x00 int a irq 11 on pci0.6.0
ahc0: aic7870 Single Channel A, SCSI Id=7, 16/255 SCBs
xl0: <3Com 3c905-TX Fast Etherlink XL> rev 0x00 int a irq 10 on pci0.12.0
xl0: Ethernet address: 00:60:08:ce:b8:c7
xl0: autoneg complete, link status good (half-duplex, 10Mbps)
vga0: <S3 Trio graphics accelerator> rev 0x00 int a irq 9 on pci0.14.0
Probing for PnP devices:
Probing for devices on the ISA bus:
sc0 on isa
sc0: VGA color <16 virtual consoles, flags=0x0>
atkbdc0 at 0x60-0x6f on motherboard
atkbd0 irq 1 on isa
sio0 at 0x3f8-0x3ff irq 4 flags 0x10 on isa
sio0: type 16550A
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1 not found at 0x2f8
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: FIFO enabled, 8 bytes threshold
fd0: 1.44MB 3.5in
wdc0 at 0x1f0-0x1f7 irq 14 on isa
wdc0: unit 0 (wd0): <WDC AC22100H>
wd0: 2014MB (4124736 sectors), 4092 cyls, 16 heads, 63 S/T, 512 B/S
wdc1 not found at 0x170
ppc0 at 0x378 irq 7 flags 0x40 on isa
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
lpt0: <generic printer> on ppbus 0
lpt0: Interrupt-driven port
ppi0: <generic parallel i/o> on ppbus 0
plip0: <PLIP network interface> on ppbus 0
vga0 at 0x3b0-0x3df maddr 0xa0000 msize 131072 on isa
npx0 on motherboard
npx0: INT 16 interface
Intel Pentium detected, installing workaround for F00F bug
Waiting 15 seconds for SCSI devices to settle
changing root device to wd0s1a
cd0 at ahc0 bus 0 target 3 lun 0
cd0: <SONY CD-ROM CDU-55S 1.0t> 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
__________
Rick Siple
rick.siple@worldnet.att.net
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