Date: Thu, 10 Sep 1998 22:41:20 -0700 From: Ben Jackson <ben@ben.com> To: bugs@FreeBSD.ORG Subject: freebsd 2.2.7 on P2 machine getting lots of interrupts? Message-ID: <199809110541.WAA18535@saturn.ben.com>
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I just built a new Pentium II machine and installed FreeBSD 2.2.7 on it
(planning to upgrade my P120 from 2.2.6 in a few days). Anyway, I
noticed my osview showing INT time constantly, which I confirmed with
iostat. While totally idle (including totally quiet network), the
machine uses 2-3% of its cpu in interrupt code. I haven't seen this
behavior before.
I'm assuming some card is setup incorrectly and is generating excessive
interrupts. This is an ASUS P2B motherboard. The only card not configured
under BSD is a Soundblaster PCI128 (haven't yet figured out if there's a
driver). dmesg output included.
Some observations:
heavy network traffic doesn't even make a blip in the interrupt
rate (it's only running 10bT).
heavy graphics activity doesn't increase int time
nothing connected to any serial, parallel, usb ports
Any other configuration info that's useful? If this is unexpected and
someone wants to fix it I can go ahead and instrument a kernel to keep
track of what interrupt routines are running...
--Ben
Copyright (c) 1992-1998 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 2.2.7-RELEASE #0: Thu Sep 10 21:10:38 PDT 1998
root@myname.my.domain:/usr/src/sys/compile/PULSAR
CPU: Pentium II (quarter-micron) (350.80-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x651 Stepping=1
Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,<b16>,<b17>,MMX,<b24>>
real memory = 134217728 (131072K bytes)
avail memory = 129380352 (126348K bytes)
Probing for devices on PCI bus 0:
chip0 <generic PCI bridge (vendor=8086 device=7190 subclass=0)> rev 2 on pci0:0:0
chip1 <generic PCI bridge (vendor=8086 device=7191 subclass=4)> rev 2 on pci0:1:0
chip2 <Intel 82371AB PCI-ISA bridge> rev 2 on pci0:4:0
chip3 <Intel 82371AB IDE interface> rev 1 on pci0:4:1
chip4 <Intel 82371AB USB interface> rev 1 int d irq 5 on pci0:4:2
chip5 <Intel 82371AB Power management controller> rev 2 on pci0:4:3
pci0:10: vendor=0x1274, device=0x5000, class=multimedia (audio) int a irq 15 [no driver assigned]
de0 <Digital 21140A Fast Ethernet> rev 34 int a irq 10 on pci0:11:0
de0: 21140A [10-100Mb/s] pass 2.2
de0: address 00:40:05:a3:de:81
vga0 <VGA-compatible display device> rev 38 int a irq 11 on pci0:12:0
Probing for devices on PCI bus 1:
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color <16 virtual consoles, flags=0x0>
sio0 at 0x3f8-0x3ff irq 4 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
lpt0 at 0x378-0x37f irq 7 on isa
lpt0: Interrupt-driven port
lp0: TCP/IP capable interface
lpt1 not found at 0xffffffff
mse0 not found at 0x23c
psm0 at 0x60-0x64 irq 12 on motherboard
psm0: model Generic PS/2 mouse, device ID 0
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): <FUJITSU MPC3043AT>
wd0: 4125MB (8448300 sectors), 8940 cyls, 15 heads, 63 S/T, 512 B/S
wdc0: unit 1 (atapi): <TOSHIBA CD-ROM XM-6302B/1012>, removable, accel, dma, iordis
wcd0: 5512Kb/sec, 256Kb cache, audio play, 16 volume levels, ejectable tray
wcd0: no disc inside, unlocked
wdc1 not found at 0x170
aha0 not found at 0x330
wt0 not found at 0x300
mcd0 not found at 0x300
matcdc0 not found at 0x230
scd0 not found at 0x230
npx0 flags 0x1 on motherboard
npx0: INT 16 interface
ccd0-3: Concatenated disk drivers
de0: enabling 10baseT port
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