Date: Wed, 19 Nov 2008 12:04:10 +0300 From: "Igor Lyapin" <igor.lyapin@gmail.com> To: "Tomas Randa" <randa@blueboard.cz> Cc: freebsd-stable@freebsd.org Subject: Re: High system in %system load . Message-ID: <fd2a4c1f0811190104k60e3288w9a77e1a78d51ad6c@mail.gmail.com> In-Reply-To: <4923D17A.6070209@blueboard.cz> References: <fd2a4c1f0811180637m6ee44d4fv4cf97d18e322ca5a@mail.gmail.com> <49234CFF.4010207@blueboard.cz> <fd2a4c1f0811182137n5c5ac427x15975b3c43038917@mail.gmail.com> <4923D17A.6070209@blueboard.cz>
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I have only one CPU: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
(2400.10-MHz K8-class CPU)
Origin =3D "GenuineIntel" Id =3D 0x6fb Stepping =3D 11
Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,
This is from systat -v and this behavior is not the same as yours, CSW
during problems could be from normal 8k -11k CSW some time rise to 57k for =
a
1-2 sec but system load ~30% in system and 10-20 process in block state
process.
---------------------------------------------------------------------------=
------------------------
3 users Load 1.45 1.95 1.77 Nov 19 11:58
Mem:KB REAL VIRTUAL VN PAGER SWAP
PAGER
Tot Share Tot Share Free in out in
out
Act 1363876 17076 4175592 31032 273076 count
All 1412996 20628 8683036 74448 pages
Proc: Interrupts
r p d s w Csw Trp Sys Int Sof Flt 44 cow 9096 total
1 19 251 14k 13k 29k 1100 272 12k 12707 zfod ata0
irq14
ozfod 210
atapci1 19
29.5%Sys 0.6%Intr 5.1%User 0.0%Nice 64.8%Idle %ozfod 2012 cpu0:
time
| | | | | | | | | | | daefr 890 bge0
256
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D>>> =
353 prcfr 2012 cpu1:
time
162 dtbuf 12807 totfr 1986 cpu3:
time
Namei Name-cache Dir-cache 100000 desvn react 1986 cpu2:
time
Calls hits % hits % 80638 numvn pdwak
99564 99060 99 308 0 25001 frevn pdpgs
intrn
Disks ad4 ad6 ad10 ar0 505820 wire
KB/t 0.00 0.00 0.00 12.46 1359456 act
tps 0 0 0 53 1880952 inact
MB/s 0.00 0.00 0.00 0.65 115104 cache
%busy 0 0 0 7 157972 free
---------------------------------------------------------------------------=
--------
On Wed, Nov 19, 2008 at 11:42 AM, Tomas Randa <randa@blueboard.cz> wrote:
> I think that ULE from 7.0 is not good enough...
> My problem was at 2x quad xeon (total 8 CPUS), where sometime system load
> increased to number 100-150 (normal was 1-4). When I look at systat -v,
> there was many CSW (about 300k, instead od 10k at normal).
> I tried many things -
>
> move from i386 to amd64 - same behaviour
> upgrade from 7.0 to 7.1BETA1 - better behaviour, but another problems..
> when I switched from ULE to 4BSD, situation get worse.
> So I tried remove one CPU and it helps!...
> My opinion is, that FeeBSD scheduler in some situations (apache/php) do
> some cycle, which rapidly increase CSW.
>
> Try to look at CSW, when your problem occurs and write me a message
>
> Regards
>
> Tom=E1=9A Randa, Hosting Blueboard.cz
> ----------------------------------
> Jabber: ares@jabber.cz
> ICQ: 100956181
> Tel: +420 245 008 678
> GSM: +420 775 086 575
>
>
>
>
>
> Igor Lyapin wrote:
>
>> On Wed, Nov 19, 2008 at 2:17 AM, Tomas Randa - Hosting Blueboard CZ <
>> tomas@blueboard.cz> wrote:
>>
>>
>>
>>> Hello,
>>>
>>> I have similar problem... what HW are you using? Some quad core xeon? O=
ne
>>> or two CPUS?
>>> I think it is scheduler based problem. Try to look at systat -v and wat=
ch
>>> CSW value at normal state and then if problem occurs..
>>>
>>>
>>
>> Context switches do not rise and in problem and normal state is about
>> 8000-
>> 12000
>>
>>
>>
>>> Are you using 4BSD, aren`t you? Did you try ULE?
>>>
>>>
>>
>> I try ULE and 4BSD problem steel exists.
>>
>>
>>
>>
>>
>>> Send dmesg...
>>>
>>>
>>
>> #dmesg
>> All buffers synced.
>> Copyright (c) 1992-2008 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 is a registered trademark of The FreeBSD Foundation.
>> FreeBSD 7.0-RELEASE-p5 #0: Mon Nov 10 19:49:07 MSK 2008
>> root@i.x00.net:/usr/obj/usr/
>>
>>
>>> src/sys/KERNEL-4BSD
>>> Timecounter "i8254" frequency 1193182 Hz quality 0
>>> CPU: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz (2400.10-MHz
>>> K8-class
>>> CPU)
>>> Origin =3D "GenuineIntel" Id =3D 0x6fb Stepping =3D 11
>>>
>>>
>>>
>>> Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,=
PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
>>> Features2=3D0xe3bd<SSE3,RSVD2,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,P=
DCM>
>>> AMD Features=3D0x20100800<SYSCALL,NX,LM>
>>> AMD Features2=3D0x1<LAHF>
>>> Cores per package: 4
>>> usable memory =3D 4283449344 (4085 MB)
>>> avail memory =3D 4134977536 (3943 MB)
>>> ACPI APIC Table: <022108 APIC2247>
>>> FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
>>> cpu0 (BSP): APIC ID: 0
>>> cpu1 (AP): APIC ID: 1
>>> cpu2 (AP): APIC ID: 2
>>> cpu3 (AP): APIC ID: 3
>>> ioapic0 <Version 2.0> irqs 0-23 on motherboard
>>> kbd1 at kbdmux0
>>> hptrr: HPT RocketRAID controller driver v1.1 (Nov 10 2008 19:48:39)
>>> acpi0: <022108 RSDT2247> on motherboard
>>> acpi0: [ITHREAD]
>>> acpi0: Power Button (fixed)
>>> acpi0: reservation of 0, a0000 (3) failed
>>> acpi0: reservation of 100000, eff00000 (3) failed
>>> Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
>>> acpi_timer0: <24-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
>>> cpu0: <ACPI CPU> on acpi0
>>> est0: <Enhanced SpeedStep Frequency Control> on cpu0
>>> est: CPU supports Enhanced Speedstep, but is not recognized.
>>> est: cpu_vendor GenuineIntel, msr 928092806000928
>>> device_attach: est0 attach returned 6
>>> p4tcc0: <CPU Frequency Thermal Control> on cpu0
>>> cpu1: <ACPI CPU> on acpi0
>>> est1: <Enhanced SpeedStep Frequency Control> on cpu1
>>> est: CPU supports Enhanced Speedstep, but is not recognized.
>>> est: cpu_vendor GenuineIntel, msr 928092806000928
>>> device_attach: est1 attach returned 6
>>> p4tcc1: <CPU Frequency Thermal Control> on cpu1
>>> cpu2: <ACPI CPU> on acpi0
>>> est2: <Enhanced SpeedStep Frequency Control> on cpu2
>>> est: CPU supports Enhanced Speedstep, but is not recognized.
>>> est: cpu_vendor GenuineIntel, msr 928092806000928
>>> device_attach: est2 attach returned 6
>>> p4tcc2: <CPU Frequency Thermal Control> on cpu2
>>> cpu3: <ACPI CPU> on acpi0
>>> est3: <Enhanced SpeedStep Frequency Control> on cpu3
>>> est: CPU supports Enhanced Speedstep, but is not recognized.
>>> est: cpu_vendor GenuineIntel, msr 928092806000928
>>> device_attach: est3 attach returned 6
>>> p4tcc3: <CPU Frequency Thermal Control> on cpu3
>>> pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
>>> pci0: <ACPI PCI bus> on pcib0
>>> pcib1: <ACPI PCI-PCI bridge> irq 16 at device 1.0 on pci0
>>> pci5: <ACPI PCI bus> on pcib1
>>> pcib2: <ACPI PCI-PCI bridge> irq 16 at device 28.0 on pci0
>>> pci2: <ACPI PCI bus> on pcib2
>>> pcib3: <ACPI PCI-PCI bridge> irq 16 at device 28.4 on pci0
>>> pci3: <ACPI PCI bus> on pcib3
>>> bge0: <Broadcom NetXtreme Gigabit Ethernet Controller, ASIC rev. 0x4201=
>
>>> mem
>>> 0xfeaf0000-0xfeafffff irq 16 at device 0.0 on pci3
>>> miibus0: <MII bus> on bge0
>>> brgphy0: <BCM5750 10/100/1000baseTX PHY> PHY 1 on miibus0
>>> brgphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT,
>>> 1000baseT-FDX, auto
>>> bge0: Ethernet address: 00:1f:c6:48:c8:9b
>>> bge0: [ITHREAD]
>>> pcib4: <ACPI PCI-PCI bridge> irq 17 at device 28.5 on pci0
>>> pci4: <ACPI PCI bus> on pcib4
>>> bge1: <Broadcom NetXtreme Gigabit Ethernet Controller, ASIC rev. 0x4201=
>
>>> mem
>>> 0xfebf0000-0xfebfffff irq 17 at device 0.0 on pci4
>>> miibus1: <MII bus> on bge1
>>> brgphy1: <BCM5750 10/100/1000baseTX PHY> PHY 1 on miibus1
>>> brgphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT,
>>> 1000baseT-FDX, auto
>>> bge1: Ethernet address: 00:1f:c6:48:ca:b7
>>> bge1: [ITHREAD]
>>> pcib5: <ACPI PCI-PCI bridge> at device 30.0 on pci0
>>> pci1: <ACPI PCI bus> on pcib5
>>> vgapci0: <VGA-compatible display> port 0xec00-0xec7f mem
>>> 0xf8000000-0xfbffffff,0xfe9c0000-0xfe9fffff at device 4.0 on pci1
>>> isab0: <PCI-ISA bridge> at device 31.0 on pci0
>>> isa0: <ISA bus> on isab0
>>> atapci0: <Intel ICH7 UDMA100 controller> port
>>> 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xffa0-0xffaf at device 31.1 on pci=
0
>>> ata0: <ATA channel 0> on atapci0
>>> ata0: [ITHREAD]
>>> ata1: <ATA channel 1> on atapci0
>>> ata1: [ITHREAD]
>>> atapci1: <Intel ICH7 SATA300 controller> port
>>> 0xdc00-0xdc07,0xd880-0xd883,0xd800-0xd807,0xd480-0xd483,0xd400-0xd40f m=
em
>>> 0xfe8ffc00-0xfe8fffff irq 19 at device 31.2 on pci0
>>> atapci1: [ITHREAD]
>>> atapci1: AHCI called from vendor specific driver
>>> atapci1: AHCI Version 01.10 controller with 4 ports detected
>>> ata2: <ATA channel 0> on atapci1
>>> ata2: [ITHREAD]
>>> ata3: <ATA channel 1> on atapci1
>>> ata3: [ITHREAD]
>>> ata4: <ATA channel 2> on atapci1
>>> ata4: [ITHREAD]
>>> ata5: <ATA channel 3> on atapci1
>>> ata5: [ITHREAD]
>>> pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
>>> acpi_button0: <Power Button> on acpi0
>>> orm0: <ISA Option ROM> at iomem 0xc0000-0xc7fff on isa0
>>> atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
>>> atkbd0: <AT Keyboard> irq 1 on atkbdc0
>>> kbd0 at atkbd0
>>> atkbd0: [GIANT-LOCKED]
>>> atkbd0: [ITHREAD]
>>> sc0: <System console> at flags 0x100 on isa0
>>> sc0: VGA <16 virtual consoles, flags=3D0x300>
>>> sio0: configured irq 4 not in bitmap of probed irqs 0
>>> sio0: port may not be enabled
>>> sio0: configured irq 4 not in bitmap of probed irqs 0
>>> sio0: port may not be enabled
>>> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
>>> sio0: type 8250 or not responding
>>> sio0: [FILTER]
>>> sio1: configured irq 3 not in bitmap of probed irqs 0
>>> sio1: port may not be enabled
>>> vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on is=
a0
>>> Timecounters tick every 1.000 msec
>>> ipfw2 (+ipv6) initialized, divert loadable, rule-based forwarding
>>> disabled,
>>> default to accept, logging limited to 5 packets/entry by default
>>> hptrr: no controller detected.
>>> acd0: DVDR <MATSHITADVD-RAM UJ-860S/1.00> at ata0-master UDMA33
>>> ad4: 476940MB <Seagate ST3500320NS SN05> at ata2-master SATA300
>>> ad6: 476940MB <Seagate ST3500320NS SN05> at ata3-master SATA300
>>> ad10: 476940MB <Seagate ST3500320NS SN05> at ata5-master SATA300
>>> ar0: 476937MB <Intel MatrixRAID RAID1> status: READY
>>> ar0: disk0 READY (master) using ad4 at ata2-master
>>> ar0: disk1 READY (mirror) using ad6 at ata3-master
>>> SMP: AP CPU #1 Launched!
>>> SMP: AP CPU #3 Launched!
>>> SMP: AP CPU #2 Launched!
>>> Trying to mount root from ufs:/dev/ar0s1a
>>> bge0: link state changed to UP
>>>
>>>
>>>
>>
>>
>>
>>> Tomas Randa
>>>
>>>
>>> Igor Lyapin wrote:
>>>
>>>
>>>
>>>> Hello
>>>> Got strange problem with high system "%system load" and very slow user
>>>> level
>>>> programs (apache+php+mysql) behavior
>>>> gstat shows 1.5-4% hard disk busy load but system shows about 20-30%
>>>> load
>>>> while user load is max 5%.
>>>> vmstat shows from 2 to 35 process in "b" state.
>>>> Now use 7.0-RELEASE-p5 , but the same problem was with 7.0-RELEASE.
>>>> And have no idea what to do with this.
>>>>
>>>>
>>>>
>>>> -------------------------------------------------------------------
>>>> #uname -a
>>>> FreeBSD i.x00.net 7.0-RELEASE-p5 FreeBSD 7.0-RELEASE-p5 #0: Mon Nov 10
>>>> 19:49:07 MSK 2008 root@i.x00.net:/usr/obj/usr/src/sys/KERNEL-4BSD
>>>> amd64
>>>> -------------------------------------------------------------------
>>>> #top
>>>>
>>>> last pid: 47964; load averages: 1.26, 1.62, 1.75 u=
p
>>>> 0+19:17:13 17:11:06
>>>> 287 processes: 10 running, 277 sleeping
>>>> CPU states: 2.2% user, 0.0% nice, 28.3% system, 0.2% interrupt, 69.=
3%
>>>> idle
>>>> Mem: 1286M Active, 1729M Inact, 478M Wired, 131M Cache, 214M Buf, 302M
>>>> Free
>>>> Swap: 8192M Total, 8192M Free
>>>> -------------------------------------------------------------------
>>>> #vmstat 5
>>>>
>>>> procs memory page disks faults c=
pu
>>>> r b w avm fre flt re pi po fr sr ad4 ad6 in sy =
cs
>>>> us
>>>> sy id
>>>> 1 24 0 4357672 419648 10598 1 0 0 10648 34 0 0 558 25212
>>>> 9072
>>>> 6 15 80
>>>> 1 29 0 4365116 414892 3060 0 0 0 2780 0 0 0 975 12270
>>>> 11501
>>>> 3 29 68
>>>> 1 25 0 4392488 408596 14142 0 0 0 13903 0 0 0 526 16696
>>>> 10389
>>>> 6 30 64
>>>> -------------------------------------------------------------------
>>>> #ps ax | grep " [DLW] "
>>>> 45585 ?? D 0:04.68 /usr/local/sbin/httpd
>>>> 45975 ?? D 0:04.92 /usr/local/sbin/httpd
>>>> 45981 ?? D 0:29.91 /usr/local/sbin/httpd
>>>> 45995 ?? D 0:23.99 /usr/local/sbin/httpd
>>>> 46019 ?? D 0:26.76 /usr/local/sbin/httpd
>>>> 46160 ?? D 0:18.89 /usr/local/sbin/httpd
>>>> 46287 ?? D 0:19.88 /usr/local/sbin/httpd
>>>> 46303 ?? D 0:05.14 /usr/local/sbin/httpd
>>>> 46307 ?? D 0:29.15 /usr/local/sbin/httpd
>>>> 46398 ?? D 0:09.18 /usr/local/sbin/httpd
>>>> 46617 ?? D 0:02.00 /usr/local/sbin/httpd
>>>> 46767 ?? D 0:05.26 /usr/local/sbin/httpd
>>>> 46771 ?? D 0:02.07 /usr/local/sbin/httpd
>>>> 46803 ?? D 0:30.51 /usr/local/sbin/httpd
>>>> 46807 ?? D 0:01.34 /usr/local/sbin/httpd
>>>> 46889 ?? D 0:01.35 /usr/local/sbin/httpd
>>>> 47659 ?? D 0:01.54 /usr/local/sbin/httpd
>>>> 47711 ?? D 0:00.92 /usr/local/sbin/httpd
>>>> 47849 ?? D 0:01.00 /usr/local/sbin/httpd
>>>> 47877 ?? D 0:00.40 /usr/local/sbin/httpd
>>>> -------------------------------------------------------------------
>>>>
>>>>
>>>> -------------------------------------------------------------------
>>>> cat ./KERNEL-4BSD | grep -v "^#"
>>>>
>>>> cpu HAMMER
>>>> ident KERNEL-4BSD
>>>>
>>>>
>>>> options SCHED_4BSD # 4BSD scheduler
>>>> options PREEMPTION # Enable kernel thread
>>>> preemption
>>>> options INET # InterNETworking
>>>> options INET6 # IPv6 communications protocol=
s
>>>> options SCTP # Stream Control Transmission
>>>> Protocol
>>>> options FFS # Berkeley Fast Filesystem
>>>> options SOFTUPDATES # Enable FFS soft updates
>>>> support
>>>> options UFS_ACL # Support for access control
>>>> lists
>>>> options UFS_DIRHASH # Improve performance on big
>>>> directories
>>>> options UFS_GJOURNAL # Enable gjournal-based UFS
>>>> journaling
>>>> options MD_ROOT # MD is a potential root devic=
e
>>>> options MSDOSFS # MSDOS Filesystem
>>>> options CD9660 # ISO 9660 Filesystem
>>>> options PROCFS # Process filesystem (requires
>>>> PSEUDOFS)
>>>> options PSEUDOFS # Pseudo-filesystem framework
>>>> options GEOM_PART_GPT # GUID Partition Tables.
>>>> options GEOM_LABEL # Provides labelization
>>>> options COMPAT_43TTY # BSD 4.3 TTY compat [KEEP
>>>> THIS!]
>>>> options COMPAT_IA32 # Compatible with i386 binarie=
s
>>>> options COMPAT_FREEBSD4 # Compatible with FreeBSD4
>>>> options COMPAT_FREEBSD5 # Compatible with FreeBSD5
>>>> options COMPAT_FREEBSD6 # Compatible with FreeBSD6
>>>> options SCSI_DELAY=3D5000 # Delay (in ms) before probi=
ng
>>>> SCSI
>>>> options KTRACE # ktrace(1) support
>>>> options SYSVSHM # SYSV-style shared memory
>>>> options SYSVMSG # SYSV-style message queues
>>>> options SYSVSEM # SYSV-style semaphores
>>>> options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time
>>>> extensions
>>>> options KBD_INSTALL_CDEV # install a CDEV entry in /dev
>>>> options ADAPTIVE_GIANT # Giant mutex is adaptive.
>>>> options STOP_NMI # Stop CPUS using NMI instead =
of
>>>> IPI
>>>> options AUDIT # Security event auditing
>>>>
>>>>
>>>> options SMP # Symmetric MultiProcessor
>>>> Kernel
>>>>
>>>> options IPFIREWALL
>>>> options IPFIREWALL_VERBOSE
>>>> options IPFIREWALL_VERBOSE_LIMIT=3D5
>>>> options IPFIREWALL_DEFAULT_TO_ACCEPT
>>>>
>>>> options QUOTA
>>>>
>>>> device cpufreq
>>>>
>>>> device acpi
>>>> device pci
>>>>
>>>> device fdc
>>>>
>>>> device ata
>>>> device atadisk # ATA disk drives
>>>> device ataraid # ATA RAID drives
>>>> device atapicd # ATAPI CDROM drives
>>>> options ATA_STATIC_ID # Static device numbering
>>>>
>>>> device ahc # AHA2940 and onboard AIC7xxx devices
>>>> options AHC_REG_PRETTY_PRINT # Print register bitfields in
>>>> debug
>>>> # output. Adds ~128k to driver.
>>>> device ahd # AHA39320/29320 and onboard AIC79xx
>>>> devices
>>>> options AHD_REG_PRETTY_PRINT # Print register bitfields in
>>>> debug
>>>> # output. Adds ~215k to driver.
>>>> device amd # AMD 53C974 (Tekram DC-390(T))
>>>> device hptiop # Highpoint RocketRaid 3xxx series
>>>> device isp # Qlogic family
>>>> device mpt # LSI-Logic MPT-Fusion
>>>> device sym # NCR/Symbios Logic (newer chipsets +
>>>> those
>>>> of `ncr')
>>>> device trm # Tekram DC395U/UW/F DC315U adapters
>>>>
>>>> device adv # Advansys SCSI adapters
>>>> device adw # Advansys wide SCSI adapters
>>>> device aic # Adaptec 15[012]x SCSI adapters,
>>>> AIC-6[23]60.
>>>> device bt # Buslogic/Mylex MultiMaster SCSI
>>>> adapters
>>>>
>>>>
>>>> device scbus # SCSI bus (required for SCSI)
>>>> device ch # SCSI media changers
>>>> device da # Direct Access (disks)
>>>> device sa # Sequential Access (tape etc)
>>>> device cd # CD
>>>> device pass # Passthrough device (direct SCSI
>>>> access)
>>>> device ses # SCSI Environmental Services (and
>>>> SAF-TE)
>>>>
>>>> device amr # AMI MegaRAID
>>>> device arcmsr # Areca SATA II RAID
>>>> device ciss # Compaq Smart RAID 5*
>>>> device dpt # DPT Smartcache III, IV - See NOTES f=
or
>>>> options
>>>> device hptmv # Highpoint RocketRAID 182x
>>>> device hptrr # Highpoint RocketRAID 17xx, 22xx, 23x=
x,
>>>> 25xx
>>>> device iir # Intel Integrated RAID
>>>> device ips # IBM (Adaptec) ServeRAID
>>>> device mly # Mylex AcceleRAID/eXtremeRAID
>>>> device twa # 3ware 9000 series PATA/SATA RAID
>>>>
>>>> device aac # Adaptec FSA RAID
>>>> device aacp # SCSI passthrough for aac (requires
>>>> CAM)
>>>> device ida # Compaq Smart RAID
>>>> device mfi # LSI MegaRAID SAS
>>>> device mlx # Mylex DAC960 family
>>>> device twe # 3ware ATA RAID
>>>>
>>>> device atkbdc # AT keyboard controller
>>>> device atkbd # AT keyboard
>>>> device psm # PS/2 mouse
>>>>
>>>> device kbdmux # keyboard multiplexer
>>>>
>>>> device vga # VGA video card driver
>>>>
>>>> device splash # Splash screen and screen saver suppo=
rt
>>>>
>>>> device sc
>>>>
>>>> device agp # support several AGP chipsets
>>>>
>>>>
>>>> device sio # 8250, 16[45]50 based serial ports
>>>> device uart # Generic UART driver
>>>>
>>>>
>>>>
>>>> device de # DEC/Intel DC21x4x (``Tulip'')
>>>> device em # Intel PRO/1000 adapter Gigabit
>>>> Ethernet
>>>> Card
>>>> device ixgb # Intel PRO/10GbE Ethernet Card
>>>> device le # AMD Am7900 LANCE and Am79C9xx PCnet
>>>> device txp # 3Com 3cR990 (``Typhoon'')
>>>> device vx # 3Com 3c590, 3c595 (``Vortex'')
>>>>
>>>> device miibus # MII bus support
>>>> device bce # Broadcom BCM5706/BCM5708 Gigabit
>>>> Ethernet
>>>> device bfe # Broadcom BCM440x 10/100 Ethernet
>>>> device bge # Broadcom BCM570xx Gigabit Ethernet
>>>> device dc # DEC/Intel 21143 and various workalik=
es
>>>> device fxp # Intel EtherExpress PRO/100B (82557,
>>>> 82558)
>>>> device lge # Level 1 LXT1001 gigabit Ethernet
>>>> device msk # Marvell/SysKonnect Yukon II Gigabit
>>>> Ethernet
>>>> device nfe # nVidia nForce MCP on-board Ethernet
>>>> device nge # NatSemi DP83820 gigabit Ethernet
>>>> device pcn # AMD Am79C97x PCI 10/100 (precedence
>>>> over
>>>> 'le')
>>>> device re # RealTek 8139C+/8169/8169S/8110S
>>>> device rl # RealTek 8129/8139
>>>> device sf # Adaptec AIC-6915 (``Starfire'')
>>>> device sis # Silicon Integrated Systems SiS 900/S=
iS
>>>> 7016
>>>> device sk # SysKonnect SK-984x & SK-982x gigabit
>>>> Ethernet
>>>> device ste # Sundance ST201 (D-Link DFE-550TX)
>>>> device ti # Alteon Networks Tigon I/II gigabit
>>>> Ethernet
>>>> device tl # Texas Instruments ThunderLAN
>>>> device tx # SMC EtherPower II (83c170 ``EPIC'')
>>>> device vge # VIA VT612x gigabit Ethernet
>>>> device vr # VIA Rhine, Rhine II
>>>> device wb # Winbond W89C840F
>>>> device xl # 3Com 3c90x (``Boomerang'',
>>>> ``Cyclone'')
>>>>
>>>>
>>>>
>>>> device loop # Network loopback
>>>> device random # Entropy device
>>>> device ether # Ethernet support
>>>> device sl # Kernel SLIP
>>>> device ppp # Kernel PPP
>>>> device tun # Packet tunnel.
>>>> device pty # Pseudo-ttys (telnet etc)
>>>> device md # Memory "disks"
>>>> device gif # IPv6 and IPv4 tunneling
>>>> device faith # IPv6-to-IPv4 relaying (translation)
>>>> device firmware # firmware assist module
>>>>
>>>> device bpf # Berkeley packet filter
>>>>
>>>> device uhci # UHCI PCI->USB interface
>>>> device ohci # OHCI PCI->USB interface
>>>> device ehci # EHCI PCI->USB interface (USB 2.0)
>>>> device usb # USB Bus (required)
>>>> device ugen # Generic
>>>> device uhid # "Human Interface Devices"
>>>> device ukbd # Keyboard
>>>> device umass # Disks/Mass storage - Requires scbus
>>>> and
>>>> da
>>>> device ums # Mouse
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>
>>
>>
>
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