Date: Thu, 19 Jul 2001 20:35:42 -0700 (PDT) From: Rob Schulhof <rrs@there.net> To: freebsd-stable@freebsd.org Subject: High interrupt rate Message-ID: <Pine.GSO.4.10.10107192025530.8104-100000@spork.there.net>
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I'm puzzled why my system is spending 1% of CPU on system interrupts when
completely idle. I even with avery thing killed except kernel proceses top
and vmstat show 0.8% is spent servicing interrupts. A 'vmstat -i' shows the
only interrupts set are the CLK and RTC. Anybody come across this? I'm
assuming it's a hardware problem.
Thanks,
Rob
4.3-STABLE FreeBSD 4.3-STABLE #0: Mon Jul 16 21:41:28 PDT
Athlon 1.4GHZ
EP-8K7A motherboard
ATAPI CD-ROM drive
Adaptec 2940UW with 2 disks
ATI Xpert 2000 card
SB PCI128 sound card
256MB Kingston DDR RAM
dmesg:
Copyright (c) 1992-2001 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 4.3-STABLE #0: Mon Jul 16 21:41:28 PDT 2001
root@schoolie.there.net:/usr/src/sys/compile/SCHOOLIE
Timecounter "i8254" frequency 1193182 Hz
Timecounter "TSC" frequency 1400059547 Hz
CPU: AMD Athlon(tm) processor (1400.06-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 = 268435456 (262144K bytes)
avail memory = 258154496 (252104K bytes)
Preloaded elf kernel "kernel" at 0xc0329000.
Pentium Pro MTRR support enabled
md0: Malloc disk
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pcib1: <AMD-761 PCI-PCI (AGP) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <ATI model 534d graphics accelerator> at 5.0 irq 10
isab0: <VIA 82C686 PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <VIA 82C686 ATA100 controller> port 0xd400-0xd40f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
chip1: <VIA 82C686 ACPI interface> at device 7.4 on pci0
ahc0: <Adaptec 2940 Ultra SCSI adapter> port 0xe400-0xe4ff mem 0xeb000000-0xeb000fff irq 15 at device 9.0 on pci0
aic7880: Wide Channel A, SCSI Id=7, 16/255 SCBs
xl0: <3Com 3c905B-TX Fast Etherlink XL> port 0xe800-0xe87f mem 0xeb002000-0xeb00207f irq 11 at device 10.0 on pci0
xl0: Ethernet address: 00:50:04:1b:8b:6e
miibus0: <MII bus> on xl0
xlphy0: <3Com internal media interface> on miibus0
xlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pcm0: <AudioPCI ES1370> port 0xec00-0xec3f irq 11 at device 12.0 on pci0
vt0 on isa0
vt0: generic, 80 col, color, 8 scr, mf2-kbd, [R3.20-b24]
vt0: driver is using old-style compatability shims
orm0: <Option ROMs> at iomem 0xc0000-0xc7fff,0xc8000-0xcc7ff 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> irq 12 on atkbdc0
psm0: model Generic PS/2 mouse, device ID 0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 8250
acd0: CDROM <ATAPI CDROM> at ata0-master using PIO4
Waiting 5 seconds for SCSI devices to settle
Mounting root from ufs:/dev/da0s1a
da0 at ahc0 bus 0 target 0 lun 0
da0: <IBM DCAS-32160W S65A> Fixed Direct Access SCSI-2 device
da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
da0: 2063MB (4226725 512 byte sectors: 255H 63S/T 263C)
da1 at ahc0 bus 0 target 2 lun 0
da1: <IBM DDRS-34560D DC1B> Fixed Direct Access SCSI-2 device
da1: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da1: 4357MB (8925000 512 byte sectors: 255H 63S/T 555C)
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