Date: Tue, 13 Apr 1999 15:17:09 +0100 From: Tony Finch <dot@dotat.at> To: hackers@freebsd.org Cc: Tony Finch <dot@dotat.at> Subject: Re: 'alternate system clock has died!' message from systat under 3.1-REL & STABLE with SMP Message-ID: <E10X3zx-0002t8-00@fanf.noc.demon.net> In-Reply-To: <19990412190816.O23025@globix.net>
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Marko Bukvic <marko@globix.net> wrote:
>
>I've got a new Asus XG-DLS dual Xeon motherboard with two Pentium II 450MHz Xeon
>procs and if I compile in SMP support I get the following problem:
>
>After bootup, if I start top and set the delay seconds (s) to 0(zero) the cpu
>load for the top process goes all the way up, and then after a little while it
>goes all the way down and everything has the same cpu utilization of 0.00%.
>
>Then if I start systat vmstat 1, it says:
>
> The alternate system clock has died!
> Reverting to ``pigs'' display.
We have also seen this on an Asus P2B-DS (440BX chip set) with dual
PII 450MHz (not Xeon). The problem doesn't occur with 400MHz
processors. As a guess we tried compiling a kernel with
BETTER_CLOCK_DIAGNOSTIC but we didn't get any additional diagnostics.
Tony.
--
f.a.n.finch dot@dotat.at fanf@demon.net
Arthur: "Oh, that sounds better, have you worked out the controls?"
Ford: "No, we just stopped playing with them."
Copyright (c) 1992-1999 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 3.1-STABLE #3: Thu Apr 1 14:00:53 BST 1999
root@quake2.games.uk.demon.net:/usr/src/sys/compile/QUAKE2
Timecounter "i8254" frequency 1193182 Hz
CPU: Pentium II/Xeon/Celeron (686-class CPU)
Origin = "GenuineIntel" Id = 0x652 Stepping=2
Features=0x183fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,<b24>>
real memory = 268435456 (262144K bytes)
avail memory = 258236416 (252184K bytes)
Programming 24 pins in IOAPIC #0
FreeBSD/SMP: Multiprocessor motherboard
cpu0 (BSP): apic id: 1, version: 0x00040011, at 0xfee00000
cpu1 (AP): apic id: 0, version: 0x00040011, at 0xfee00000
io0 (APIC): apic id: 2, version: 0x00170011, at 0xfec00000
Preloaded elf kernel "kernel" at 0xf02c5000.
Probing for devices on PCI bus 0:
chip0: <Intel 82443BX host to PCI bridge> rev 0x03 on pci0.0.0
chip1: <Intel 82443BX host to AGP bridge> rev 0x03 on pci0.1.0
chip2: <Intel 82371AB PCI to ISA bridge> rev 0x02 on pci0.4.0
chip3: <Intel 82371AB Power management controller> rev 0x02 on pci0.4.3
ahc0: <Adaptec aic7890/91 Ultra2 SCSI adapter> rev 0x00 int a irq 19 on pci0.6.0
ahc0: aic7890/91 Wide Channel A, SCSI Id=7, 16/255 SCBs
fxp0: <Intel EtherExpress Pro 10/100B Ethernet> rev 0x08 int a irq 18 on pci0.10.0
fxp0: Ethernet address 00:90:27:41:c2:9b
Probing for devices on PCI bus 1:
vga0: <ATI model 475a graphics accelerator> rev 0x7a int a irq 16 on pci1.0.0
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
psm0 not found
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
wt0 not found at 0x300
mcd0 not found at 0x300
matcdc0 not found at 0x230
scd0 not found at 0x230
ppc0 not found
vga0 at 0x3b0-0x3df maddr 0xa0000 msize 131072 on isa
npx0 on motherboard
npx0: INT 16 interface
APIC_IO: Testing 8254 interrupt delivery
APIC_IO: routing 8254 via pin 2
Waiting 25 seconds for SCSI devices to settle
SMP: AP CPU #1 Launched!
changing root device to da0s1a
da0 at ahc0 bus 0 target 0 lun 0
da0: <SEAGATE ST34573LW 5960> Fixed Direct Access SCSI-2 device
da0: 80.000MB/s transfers (40.000MHz, offset 15, 16bit), Tagged Queueing Enabled
da0: 4340MB (8888924 512 byte sectors: 255H 63S/T 553C)
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