Date: Wed, 16 Oct 2002 10:34:29 -0700 (PDT) From: Aaron Clow <volswaggen@yahoo.com> To: freebsd-hackers@freebsd.org Subject: Question about CPU backlogs under -CURRENT Message-ID: <20021016173429.95422.qmail@web9301.mail.yahoo.com>
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I figured I'd stop here first, and didn't want to
cross-post to CURRENT, but I'm hoping someone can
offer a little illumination on a problem I'm having.
I'm running -CURRENT from Oct 8th (same problem on
CURRENT builds from August to present) on a Dell
Inspiron 4000 and ever since I switched from 4.5 when
I'm listening to audio I get pops, crackles &
stuttering. I first thought it might be an interrupt
problem, but after running vmstat everything looks
fine except that there are always 2-6 processes
waiting for CPU time. This is odd, because top is
always showing anywhere from 80-85% idle time. Any
idea what could be going on? I've turned off most of
the debugging in the kernel, so I'm pretty sure I'm
not wasting CPU cycles on that (although, duh, I can't
troubleshoot this now)...
DMESG:
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 5.0-CURRENT #0: Tue Oct 8 12:27:23 EDT 2002
Preloaded elf kernel "/boot/kernel/kernel" at
0xc04c7000.
Preloaded elf module "/boot/kernel/snd_maestro3.ko" at
0xc04c70a8.
Preloaded elf module "/boot/kernel/snd_pcm.ko" at
0xc04c715c.
Preloaded elf module "/boot/kernel/smbfs.ko" at
0xc04c7208.
Preloaded elf module "/boot/kernel/libmchain.ko" at
0xc04c72b4.
Preloaded elf module "/boot/kernel/libiconv.ko" at
0xc04c7364.
Preloaded elf module "/boot/kernel/acpi.ko" at
0xc04c7414.
Timecounter "i8254" frequency 1193182 Hz
Timecounter "TSC" frequency 701593803 Hz
CPU: Pentium III/Pentium III Xeon/Celeron (701.59-MHz
686-class CPU)
Origin = "GenuineIntel" Id = 0x686 Stepping = 6
Features=0x383f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
real memory = 268353536 (262064K bytes)
avail memory = 255275008 (249292K bytes)
Pentium Pro MTRR support enabled
netsmb_dev: loaded
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <DELL CPi R > on motherboard
Using $PIR table, 9 entries at 0xc00fbd80
Timecounter "ACPI-safe" frequency 3579545 Hz
acpi_timer0: <24-bit timer at 3.579545MHz> port
0x808-0x80b on acpi0
acpi_cpu0: <CPU> on acpi0
acpi_tz0: <thermal zone> on acpi0
acpi_acad0: <AC adapter> on acpi0
acpi_cmbat0: <Control method Battery> on acpi0
acpi_cmbat1: <Control method Battery> on acpi0
acpi_lid0: <Control Method Lid Switch> on acpi0
acpi_button0: <Power Button> on acpi0
acpi_button1: <Sleep Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on
acpi0
pci0: <ACPI PCI bus> on pcib0
agp0: <Intel 82443BX (440 BX) host to PCI bridge> mem
0xe0000000-0xe3ffffff at device 0.0 on pci0
pcib1: <ACPI PCI-PCI bridge> at device 1.0 on pci0
pci1: <ACPI PCI bus> on pcib1
pci1: <display, VGA> at device 0.0 (no driver
attached)
cbb0: <TI1420 PCI-CardBus Bridge> at device 3.0 on
pci0
cardbus0: <CardBus bus> on cbb0
pccard0: <16-bit PCCard bus> on cbb0
pcib0: slot 3 INTA is routed to irq 11
cbb1: <TI1420 PCI-CardBus Bridge> at device 3.1 on
pci0
cardbus1: <CardBus bus> on cbb1
pccard1: <16-bit PCCard bus> on cbb1
pcib0: slot 3 INTA is routed to irq 11
pcib0: slot 3 INTA is routed to irq 11
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port
0x860-0x86f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port
0xdce0-0xdcff irq 11 at device 7.2 on pci0
usb0: <Intel 82371AB/EB (PIIX4) USB controller> on
uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00,
addr 1
uhub0: 2 ports with 2 removable, self powered
pci0: <bridge, PCI-unknown> at device 7.3 (no driver
attached)
pcm0: <ESS Technology Maestro3> port 0xd800-0xd8ff mem
0xfbffe000-0xfbffffff irq 5 at device 8.0 on pci0
xl0: <3Com 3c556 Fast Etherlink XL> port 0xd400-0xd4ff
mem 0xfbffd800-0xfbffd87f,0xfbffdc00-0xfbffdc7f irq 11
at device 16.0 on pci0
xl0: Ethernet address: 00:01:03:85:8c:38
miibus0: <MII bus> on xl0
ukphy0: <Generic IEEE 802.3u media interface> on
miibus0
ukphy0: 10baseT, 10baseT-FDX, 100baseTX,
100baseTX-FDX, auto
pci0: <simple comms> at device 16.1 (no driver
attached)
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60
irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model IntelliMouse, device ID 3
fdc0: <enhanced floppy controller (i82077, NE72065 or
clone)> port 0x3f7,0x3f2-0x3f5 irq 6 drq 2 on acpi0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A
ppc0 port 0x778-0x77b,0x378-0x37f irq 7 on acpi0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in
COMPATIBLE mode
ppc0: FIFO with 16/16/8 bytes threshold
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
orm0: <Option ROMs> at iomem
0xd3800-0xd3fff,0xd3000-0xd37ff,0xd2800-0xd2fff,0xd2000-0xd27ff,0xd1800-0xd1fff,0xd1000-0xd17ff,0xd0800-0xd0fff,0xd0000-0xd07ff,0xc0000-0xcffff
on isa0
sc0: <System console> on isa0
sc0: VGA <16 virtual consoles, flags=0x200>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem
0xa0000-0xbffff on isa0
pmtimer0 on isa0
Timecounters tick every 10.000 msec
ad0: 19077MB <IBM-DJSA-220> [38760/16/63] at
ata0-master UDMA33
acd0: CDROM <TEAC CD-ROM CD-224E> at ata1-master
UDMA33
Mounting root from ufs:/dev/ad0s2a
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