From owner-freebsd-hackers Tue Apr 13 7:19:43 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from noc.demon.net (server.noc.demon.net [193.195.224.4]) by hub.freebsd.org (Postfix) with ESMTP id 0119D15239 for ; Tue, 13 Apr 1999 07:19:40 -0700 (PDT) (envelope-from fanf@demon.net) Received: by noc.demon.net; id PAA27320; Tue, 13 Apr 1999 15:17:20 +0100 (BST) Received: from fanf.noc.demon.net(195.11.55.83) by inside.noc.demon.net via smap (3.2) id xma027286; Tue, 13 Apr 99 15:17:09 +0100 Received: from fanf by fanf.noc.demon.net with local (Exim 1.73 #2) id 10X3zx-0002t8-00; Tue, 13 Apr 1999 15:17:09 +0100 To: hackers@freebsd.org From: Tony Finch Cc: Tony Finch Subject: Re: 'alternate system clock has died!' message from systat under 3.1-REL & STABLE with SMP In-Reply-To: <19990412190816.O23025@globix.net> Message-Id: Date: Tue, 13 Apr 1999 15:17:09 +0100 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Marko Bukvic 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> 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: rev 0x03 on pci0.0.0 chip1: rev 0x03 on pci0.1.0 chip2: rev 0x02 on pci0.4.0 chip3: rev 0x02 on pci0.4.3 ahc0: rev 0x00 int a irq 19 on pci0.6.0 ahc0: aic7890/91 Wide Channel A, SCSI Id=7, 16/255 SCBs fxp0: 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: 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: 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) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message