I have a machine with an AMD 1ghz and an IBM UMDA 100 disk. Until about
12-13 days ago (Jan 16-17), this machine was nice and fast on disk IO.
I haven't done much io wise on the machine in the days since I did that
last buildworld, but when I tried to buildworld yesterday and today,
I am getting pretty often:
Jan 29 13:16:09 ulfbsd /kernel: ad0: WRITE command timeout tag=0 serv=0 - resetting
Jan 29 13:16:11 ulfbsd /kernel: ata0: resetting devices .. done
Jan 29 13:19:06 ulfbsd /kernel: ad0: WRITE command timeout tag=0 serv=0 - resetting
Jan 29 13:19:06 ulfbsd /kernel: ata0: resetting devices .. done
Jan 29 13:22:17 ulfbsd /kernel: ad0: WRITE command timeout tag=0 serv=0 - resetting
Jan 29 13:22:20 ulfbsd /kernel: ata0: resetting devices .. done
Jan 29 13:22:56 ulfbsd /kernel: ad0: READ command timeout tag=0 serv=0 - resetting
Jan 29 13:23:03 ulfbsd /kernel: ata0: resetting devices .. done
This only happens under "heavy" io, and looking at "systat -vm" the io
is not very fast:
Disks ad0 acd0 fd0 md0 1884 ofod intrn
KB/t 8.00 0.00 0.00 0.00 %slo-z 61984 buf
tps 12 0 0 0 2084 tfree 400 dirtybuf
MB/s 0.09 0.00 0.00 0.00 32528 desiredvnodes
% busy 100 0 0 0 8132 numvnodes
Disks ad0 acd0 fd0 md0 ofod intrn
KB/t 22.39 0.00 0.00 0.00 %slo-z 61984 buf
tps 17 0 0 0 tfree 123 dirtybuf
MB/s 0.38 0.00 0.00 0.00 32528 desiredvnodes
% busy 100 0 0 0 8132 numvnodes
The MB/s is always below .4, % busy always at 100. CPU load itself
is below 1. Nothing in regards to hardware has changed in this machine
for many weeks.
Here is the dmesg from boot:
Copyright (c) 1992-2002 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 4.5-STABLE #8: Mon Jan 28 15:52:55 PST 2002
[EMAIL PROTECTED]:/usr/obj/usr/src/sys/ULFTOY
Timecounter "i8254" frequency 1193182 Hz
CPU: AMD Athlon(tm) Processor (1000.04-MHz 686-class CPU)
Origin = "AuthenticAMD" Id = 0x642 Stepping = 2
Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
AMD Features=0xc0440000<<b18>,AMIE,DSP,3DNow!>
real memory = 536805376 (524224K bytes)
config> q
avail memory = 518705152 (506548K bytes)
Preloaded elf kernel "kernel" at 0xc03ee000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc03ee09c.
Preloaded elf module "agp.ko" at 0xc03ee0ec.
Pentium Pro MTRR support enabled
md0: Malloc disk
Using $PIR table, 8 entries at 0xc00fddf0
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
agp0: <VIA 82C8363 (Apollo KT133A) host to PCI bridge> mem 0xd8000000-0xdbffffff at
device 0.0 on pci0
pcib1: <VIA 8363 (Apollo KT133) PCI-PCI (AGP) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <NVidia GeForce2 GTS graphics accelerator> at 0.0 irq 11
isab0: <VIA 82C686 PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <VIA 82C686 ATA100 controller> port 0xd000-0xd00f at device 7.1 on pci0
atapci0: Correcting VIA config for southbridge data corruption bug
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
uhci0: <VIA 83C572 USB controller> port 0xd400-0xd41f irq 9 at device 7.2 on pci0
usb0: <VIA 83C572 USB controller> on uhci0
usb0: USB revision 1.0
uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
ums0: Logitech USB Mouse, rev 1.10/6.10, addr 2, iclass 3/1
ums0: 3 buttons and Z dir.
uhub1: Genesys Logic, Inc. USB Hub, class 9/0, rev 1.01/0.12, addr 3
uhub1: 4 ports with 4 removable, bus powered
uhci1: <VIA 83C572 USB controller> port 0xd800-0xd81f irq 9 at device 7.3 on pci0
usb1: <VIA 83C572 USB controller> on uhci1
usb1: USB revision 1.0
uhub2: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
chip0: <VIA 82C686 ACPI interface> at device 7.4 on pci0
fxp0: <Intel Pro 10/100B/100+ Ethernet> port 0xe000-0xe01f mem
0xdf000000-0xdf0fffff,0xdf100000-0xdf100fff irq 11 at device 9.0 on pci0
fxp0: Ethernet address 00:a0:c9:a0:7f:72
inphy0: <i82555 10/100 media interface> on miibus0
inphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
rl0: <RealTek 8139 10/100BaseTX> port 0xe400-0xe4ff mem 0xdf101000-0xdf1010ff irq 10
at device 10.0 on pci0
rl0: Ethernet address: 00:50:ba:8f:cb:28
miibus1: <MII bus> on rl0
rlphy0: <RealTek internal media interface> on miibus1
rlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pcm0: <Creative CT5880-C> port 0xe800-0xe83f irq 5 at device 11.0 on pci0
orm0: <Option ROM> at iomem 0xc0000-0xcbfff on isa0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> flags 0x100 irq 12 on atkbdc0
psm0: model IntelliMouse, device ID 3
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
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
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: Generic chipset (EPP/NIBBLE) in COMPATIBLE mode
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
ad0: 58644MB <IC35L060AVER07-0> [119150/16/63] at ata0-master UDMA100
acd0: CD-RW <TDK CDRW321040X> at ata1-master using PIO4
--
Regards, Ulf.
---------------------------------------------------------------------
Ulf Zimmermann, 1525 Pacific Ave., Alameda, CA-94501, #: 510-865-0204
You can find my resume at: http://seven.Alameda.net/~ulf/resume.html
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