Re: Interrupt time inflation on Xen

To: port-xen%netbsd.org@localhost
Subject: Re: Interrupt time inflation on Xen
From: Thor Lancelot Simon <tls%panix.com@localhost>
Date: Sun, 20 Mar 2016 20:19:23 -0400

Same machine, new disk controller, new "disks" (SSDs), made it a
pure disk I/O test.  Same results:

	dd if=/dev/rsd0d of=/dev/null bs=1m

With a netbsd-7 branch GENERIC kernel, I get:

	* 640MB/sec
	* about 2% interrupt time (system mostly idle)
	* about 16,500 interrupts/sec,
	  of which 10,000 are TLB shootdown IPIs and 6,500 are from the
	  disk controller, which unsurprisingly is doing 6,500 IOPS.

With a netbsd-7 branch XEN3_DOM0 kernel, I get:

	* 300MB/sec
	* about 60% interrupt time (system noticeably laggy)
	* about 6,000 interrupts/sec, all of which seem to be
	  "from" the disk controller, which is doing only about 3,000 IOPS.

I've attached the dmesg from the GENERIC kernel and the boot-time
messages (giving both the xen dmesg and NetBSD dmesg) from the XEN3_DOM0
kernel.  Xen kernel is 4.5 from pkgsrc; it is NOT a debug kernel.

Interrupt routing seems to be the same, disk controller is on ioapic1 pin 6
in both cases.

Thor

Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 7.0 (GENERIC.201509250726Z)
total memory = 73718 MB
avail memory = 71562 MB
kern.module.path=/stand/amd64/7.0/modules
timecounter: Timecounters tick every 10.000 msec
timecounter: Timecounter "i8254" frequency 1193182 Hz quality 100
Dell                   CS24-TY                (A00                   )
mainbus0 (root)
ACPI: RSDP 0xfadd0 000024 (v02 ACPIAM)
ACPI: XSDT 0xbf6f0100 00008C (v01 110410 XSDT1337 20101104 MSFT 00000097)
ACPI: FACP 0xbf6f0290 0000F4 (v03 110410 FACP1337 20101104 MSFT 00000097)
ACPI BIOS Warning (bug): 32/64X length mismatch in FADT/Gpe0Block: 128/64 (20131218/tbfadt-634)
ACPI: DSDT 0xbf6f05d0 005DDD (v01  DS993 DS993B16 00000B16 INTL 20051117)
ACPI: FACS 0xbf6fe000 000040
ACPI: APIC 0xbf6f0390 0001AE (v01 110410 APIC1337 20101104 MSFT 00000097)
ACPI: SPCR 0xbf6f0540 000050 (v01 110410 SPCR1337 20101104 MSFT 00000097)
ACPI: MCFG 0xbf6f0590 00003C (v01 110410 OEMMCFG  20101104 MSFT 00000097)
ACPI: SSDT 0xbf6fa5d0 00002A (v01 OEM_ID OEMTBLID 00000001 INTL 20051117)
ACPI: OEMB 0xbf6fe040 000083 (v01 110410 OEMB1337 20101104 MSFT 00000097)
ACPI: HPET 0xbf6fa600 000038 (v01 110410 OEMHPET  20101104 MSFT 00000097)
ACPI: DMAR 0xbf6fe0d0 000128 (v01    AMI  OEMDMAR 00000001 MSFT 00000097)
ACPI: SSDT 0xbf7033c0 000363 (v01 DpgPmm    CpuPm 00000012 INTL 20051117)
ACPI: EINJ 0xbf6fa640 000130 (v01  AMIER AMI_EINJ 20101104 MSFT 00000097)
ACPI: BERT 0xbf6fa7d0 000030 (v01  AMIER AMI_BERT 20101104 MSFT 00000097)
ACPI: ERST 0xbf6fa800 0001B0 (v01  AMIER AMI_ERST 20101104 MSFT 00000097)
ACPI: HEST 0xbf6fa9b0 0000A8 (v01  AMIER ABC_HEST 20101104 MSFT 00000097)
ACPI: All ACPI Tables successfully acquired
ioapic0 at mainbus0 apid 6: pa 0xfec00000, version 0x20, 24 pins
ioapic1 at mainbus0 apid 7: pa 0xfec8a000, version 0x20, 24 pins
cpu0 at mainbus0 apid 0: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu1 at mainbus0 apid 2: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu2 at mainbus0 apid 4: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu3 at mainbus0 apid 16: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu4 at mainbus0 apid 18: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu5 at mainbus0 apid 20: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu6 at mainbus0 apid 32: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu7 at mainbus0 apid 34: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu8 at mainbus0 apid 36: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu9 at mainbus0 apid 48: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu10 at mainbus0 apid 50: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu11 at mainbus0 apid 52: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu12 at mainbus0 apid 1: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu13 at mainbus0 apid 3: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu14 at mainbus0 apid 5: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu15 at mainbus0 apid 17: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu16 at mainbus0 apid 19: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu17 at mainbus0 apid 21: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu18 at mainbus0 apid 33: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu19 at mainbus0 apid 35: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu20 at mainbus0 apid 37: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu21 at mainbus0 apid 49: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu22 at mainbus0 apid 51: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
cpu23 at mainbus0 apid 53: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
acpi0 at mainbus0: Intel ACPICA 20131218
acpi0: X/RSDT: OemId <110410,XSDT1337,20101104>, AslId <MSFT,00000097>
ACPI BIOS Warning (bug): Incorrect checksum in table [OEMB] - 0x40, should be 0x3E (20131218/tbprint-237)
ACPI: SSDT 0xbf6fe200 003B1C (v01 DpgPmm  P001Ist 00000011 INTL 20051117)
ACPI: SSDT 0x0 003B1C (v01 DpgPmm  P001Ist 00000011 INTL 20051117)
ACPI: SSDT 0xbf701d20 000C88 (v01  PmRef  P001Cst 00003001 INTL 20051117)
ACPI: SSDT 0x0 000C88 (v01  PmRef  P001Cst 00003001 INTL 20051117)
ACPI: SSDT 0xbf7029b0 000A0A (v01  PmRef  Cpu0Tst 00003000 INTL 20051117)
ACPI: SSDT 0x0 000A0A (v01  PmRef  Cpu0Tst 00003000 INTL 20051117)
acpi0: SCI interrupting at int 9
timecounter: Timecounter "ACPI-Fast" frequency 3579545 Hz quality 1000
hpet0 at acpi0: high precision event timer (mem 0xfed00000-0xfed00400)
timecounter: Timecounter "hpet0" frequency 14318180 Hz quality 2000
IOH (PNP0C01) at acpi0 not configured
attimer1 at acpi0 (TMR, PNP0100): io 0x40-0x43 irq 0
pcppi1 at acpi0 (SPKR, PNP0800): io 0x61
midi0 at pcppi1: PC speaker
sysbeep0 at pcppi1
UAR2 (PNP0501) at acpi0 not configured
SIOR (PNP0C02) at acpi0 not configured
RMSC (PNP0C02) at acpi0 not configured
OMSC (PNP0C02) at acpi0 not configured
PCIE (PNP0C02) at acpi0 not configured
RMEM (PNP0C01) at acpi0 not configured
acpibut0 at acpi0 (PWRB, PNP0C0C-170): ACPI Power Button
MI0 (IPI0001) at acpi0 not configured
ACPI: Enabled 2 GPEs in block 00 to 3F
ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S2_] (20131218/hwxface-646)
ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S3_] (20131218/hwxface-646)
attimer1: attached to pcppi1
ipmi0 at mainbus0
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
pchb0 at pci0 dev 0 function 0: vendor 0x8086 product 0x3403 (rev. 0x22)
ppb0 at pci0 dev 1 function 0: vendor 0x8086 product 0x3408 (rev. 0x22)
ppb0: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x2 @ 5.0GT/s
pci1 at ppb0 bus 1
pci1: i/o space, memory space enabled, rd/line, wr/inv ok
ppb1 at pci0 dev 2 function 0: vendor 0x8086 product 0x3409 (rev. 0x22)
ppb1: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x2 @ 5.0GT/s
pci2 at ppb1 bus 2
pci2: i/o space, memory space enabled, rd/line, wr/inv ok
ppb2 at pci0 dev 3 function 0: vendor 0x8086 product 0x340a (rev. 0x22)
ppb2: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x4 @ 5.0GT/s
pci3 at ppb2 bus 3
pci3: i/o space, memory space enabled, rd/line, wr/inv ok
ppb3 at pci0 dev 7 function 0: vendor 0x8086 product 0x340e (rev. 0x22)
ppb3: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x16 @ 5.0GT/s
ppb3: link is x8 @ 5.0GT/s
pci4 at ppb3 bus 4
pci4: i/o space, memory space enabled, rd/line, wr/inv ok
ciss0 at pci4 dev 0 function 0: HP Smart Array 11
ciss0: interrupting at ioapic1 pin 6
ciss0: 2 LDs, HW rev 2, FW 6.40/6.40, 64bit fifo rro
scsibus0 at ciss0: 2 targets, 1 lun per target
vendor 0x8086 product 0x342d (interrupt system, IO(x) APIC, revision 0x22) at pci0 dev 19 function 0 not configured
vendor 0x8086 product 0x342e (interrupt system, generic 8259, revision 0x22) at pci0 dev 20 function 0 not configured
vendor 0x8086 product 0x3422 (interrupt system, generic 8259, revision 0x22) at pci0 dev 20 function 1 not configured
vendor 0x8086 product 0x3423 (interrupt system, generic 8259, revision 0x22) at pci0 dev 20 function 2 not configured
vendor 0x8086 product 0x3438 (interrupt system, generic 8259, revision 0x22) at pci0 dev 20 function 3 not configured
vendor 0x8086 product 0x3430 (miscellaneous system, revision 0x22) at pci0 dev 22 function 0 not configured
vendor 0x8086 product 0x3431 (miscellaneous system, revision 0x22) at pci0 dev 22 function 1 not configured
vendor 0x8086 product 0x3432 (miscellaneous system, revision 0x22) at pci0 dev 22 function 2 not configured
vendor 0x8086 product 0x3433 (miscellaneous system, revision 0x22) at pci0 dev 22 function 3 not configured
vendor 0x8086 product 0x3429 (miscellaneous system, revision 0x22) at pci0 dev 22 function 4 not configured
vendor 0x8086 product 0x342a (miscellaneous system, revision 0x22) at pci0 dev 22 function 5 not configured
vendor 0x8086 product 0x342b (miscellaneous system, revision 0x22) at pci0 dev 22 function 6 not configured
vendor 0x8086 product 0x342c (miscellaneous system, revision 0x22) at pci0 dev 22 function 7 not configured
uhci0 at pci0 dev 26 function 0: vendor 0x8086 product 0x3a37 (rev. 0x00)
uhci0: interrupting at ioapic0 pin 23
usb0 at uhci0: USB revision 1.0
uhci1 at pci0 dev 26 function 1: vendor 0x8086 product 0x3a38 (rev. 0x00)
uhci1: interrupting at ioapic0 pin 22
usb1 at uhci1: USB revision 1.0
uhci2 at pci0 dev 26 function 2: vendor 0x8086 product 0x3a39 (rev. 0x00)
uhci2: interrupting at ioapic0 pin 21
usb2 at uhci2: USB revision 1.0
ehci0 at pci0 dev 26 function 7: vendor 0x8086 product 0x3a3c (rev. 0x00)
ehci0: interrupting at ioapic0 pin 20
ehci0: EHCI version 1.0
ehci0: companion controllers, 2 ports each: uhci0 uhci1 uhci2
usb3 at ehci0: USB revision 2.0
ppb4 at pci0 dev 28 function 0: vendor 0x8086 product 0x3a40 (rev. 0x00)
ppb4: PCI Express capability version 1 <Root Port of PCI-E Root Complex> x4 @ 2.5GT/s
pci5 at ppb4 bus 5
pci5: i/o space, memory space enabled, rd/line, wr/inv ok
wm0 at pci5 dev 0 function 0: 82576 1000BaseT Ethernet (rev. 0x01)
wm0: interrupting at ioapic0 pin 16
wm0: PCI-Express bus
wm0: 16384 words (16 address bits) SPI EEPROM
wm0: Ethernet address e8:9a:8f:14:17:c8
wm0: Copper
igphy0 at wm0 phy 1: i82566 10/100/1000 media interface, rev. 1
igphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
wm1 at pci5 dev 0 function 1: 82576 1000BaseT Ethernet (rev. 0x01)
wm1: interrupting at ioapic0 pin 17
wm1: PCI-Express bus
wm1: 16384 words (16 address bits) SPI EEPROM
wm1: Ethernet address e8:9a:8f:14:17:c9
wm1: Copper
igphy1 at wm1 phy 1: i82566 10/100/1000 media interface, rev. 1
igphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
uhci3 at pci0 dev 29 function 0: vendor 0x8086 product 0x3a34 (rev. 0x00)
uhci3: interrupting at ioapic0 pin 23
usb4 at uhci3: USB revision 1.0
uhci4 at pci0 dev 29 function 1: vendor 0x8086 product 0x3a35 (rev. 0x00)
uhci4: interrupting at ioapic0 pin 22
usb5 at uhci4: USB revision 1.0
uhci5 at pci0 dev 29 function 2: vendor 0x8086 product 0x3a36 (rev. 0x00)
uhci5: interrupting at ioapic0 pin 21
usb6 at uhci5: USB revision 1.0
ehci1 at pci0 dev 29 function 7: vendor 0x8086 product 0x3a3a (rev. 0x00)
ehci1: interrupting at ioapic0 pin 23
ehci1: EHCI version 1.0
ehci1: companion controllers, 2 ports each: uhci3 uhci4 uhci5
usb7 at ehci1: USB revision 2.0
ppb5 at pci0 dev 30 function 0: vendor 0x8086 product 0x244e (rev. 0x90)
pci6 at ppb5 bus 7
pci6: i/o space, memory space enabled
vga0 at pci6 dev 11 function 0: vendor 0x1a03 product 0x2000 (rev. 0x10)
wsdisplay0 at vga0 kbdmux 1
wsmux1: connecting to wsdisplay0
drm at vga0 not configured
ichlpcib0 at pci0 dev 31 function 0: vendor 0x8086 product 0x3a16 (rev. 0x00)
timecounter: Timecounter "ichlpcib0" frequency 3579545 Hz quality 1000
ichlpcib0: 24-bit timer
ichlpcib0: TCO timer reboot disabled by hardware; hope SMBIOS properly handles it.
ichlpcib0: TCO (watchdog) timer configured.
ichsmb0 at pci0 dev 31 function 3: vendor 0x8086 product 0x3a30 (rev. 0x00)
ichsmb0: interrupting at ioapic0 pin 18
iic0 at ichsmb0: I2C bus
isa0 at ichlpcib0
com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
com1: console
pckbc0 at isa0 port 0x60-0x64
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0 mux 1
wskbd0: connecting to wsdisplay0
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
acpicpu0 at cpu0: ACPI CPU
acpicpu0: C1: FFH, lat   1 us, pow  1000 mW
acpicpu0: C3: FFH, lat  17 us, pow   350 mW
acpicpu0: P0: FFH, lat  10 us, pow 71000 mW, 2134 MHz, turbo boost
acpicpu0: P1: FFH, lat  10 us, pow 60000 mW, 2133 MHz
acpicpu0: P2: FFH, lat  10 us, pow 48000 mW, 2000 MHz
acpicpu0: P3: FFH, lat  10 us, pow 39000 mW, 1867 MHz
acpicpu0: P4: FFH, lat  10 us, pow 31000 mW, 1733 MHz
acpicpu0: P5: FFH, lat  10 us, pow 25000 mW, 1600 MHz
acpicpu0: T0: FFH, lat   1 us, pow   480 mW, 100 %
acpicpu0: T1: FFH, lat   1 us, pow   420 mW,  88 %
acpicpu0: T2: FFH, lat   1 us, pow   360 mW,  75 %
acpicpu0: T3: FFH, lat   1 us, pow   300 mW,  63 %
acpicpu0: T4: FFH, lat   1 us, pow   240 mW,  50 %
acpicpu0: T5: FFH, lat   1 us, pow   180 mW,  38 %
acpicpu0: T6: FFH, lat   1 us, pow   120 mW,  25 %
acpicpu0: T7: FFH, lat   1 us, pow    60 mW,  13 %
coretemp0 at cpu0: thermal sensor, 1 C resolution, Tjmax=79
acpicpu1 at cpu1: ACPI CPU
coretemp1 at cpu1: thermal sensor, 1 C resolution, Tjmax=79
acpicpu2 at cpu2: ACPI CPU
coretemp2 at cpu2: thermal sensor, 1 C resolution, Tjmax=79
acpicpu3 at cpu3: ACPI CPU
coretemp3 at cpu3: thermal sensor, 1 C resolution, Tjmax=79
acpicpu4 at cpu4: ACPI CPU
coretemp4 at cpu4: thermal sensor, 1 C resolution, Tjmax=79
acpicpu5 at cpu5: ACPI CPU
coretemp5 at cpu5: thermal sensor, 1 C resolution, Tjmax=79
acpicpu6 at cpu6: ACPI CPU
coretemp6 at cpu6: thermal sensor, 1 C resolution, Tjmax=79
acpicpu7 at cpu7: ACPI CPU
coretemp7 at cpu7: thermal sensor, 1 C resolution, Tjmax=79
acpicpu8 at cpu8: ACPI CPU
coretemp8 at cpu8: thermal sensor, 1 C resolution, Tjmax=79
acpicpu9 at cpu9: ACPI CPU
coretemp9 at cpu9: thermal sensor, 1 C resolution, Tjmax=79
acpicpu10 at cpu10: ACPI CPU
coretemp10 at cpu10: thermal sensor, 1 C resolution, Tjmax=79
acpicpu11 at cpu11: ACPI CPU
coretemp11 at cpu11: thermal sensor, 1 C resolution, Tjmax=79
acpicpu12 at cpu12: ACPI CPU
acpicpu13 at cpu13: ACPI CPU
acpicpu14 at cpu14: ACPI CPU
acpicpu15 at cpu15: ACPI CPU
acpicpu16 at cpu16: ACPI CPU
acpicpu17 at cpu17: ACPI CPU
acpicpu18 at cpu18: ACPI CPU
acpicpu19 at cpu19: ACPI CPU
acpicpu20 at cpu20: ACPI CPU
acpicpu21 at cpu21: ACPI CPU
acpicpu22 at cpu22: ACPI CPU
acpicpu23 at cpu23: ACPI CPU
timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
ERROR: 446 cycle TSC drift observed
scsibus0: waiting 2 seconds for devices to settle...
IPsec: Initialized Security Association Processing.
uhub0 at usb1: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhub1 at usb0: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhub2 at usb2: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
uhub3 at usb3: vendor 0x8086 EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub3: 6 ports with 6 removable, self powered
uhub4 at usb5: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub4: 2 ports with 2 removable, self powered
uhub5 at usb7: vendor 0x8086 EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub5: 6 ports with 6 removable, self powered
uhub6 at usb6: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub6: 2 ports with 2 removable, self powered
uhub7 at usb4: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub7: 2 ports with 2 removable, self powered
sd0 at scsibus0 target 0 lun 0: <HP, LOGICAL VOLUME, 6.40> disk fixed
sd0: 99 GB, 25700 cyl, 255 head, 32 sec, 512 bytes/sect x 209712000 sectors
sd0: async, 8-bit transfers, tagged queueing
sd1 at scsibus0 target 1 lun 0: <HP, LOGICAL VOLUME, 6.40> disk fixed
sd1: 1688 GB, 65535 cyl, 255 head, 211 sec, 512 bytes/sect x 3540926640 sectors
sd1: async, 8-bit transfers, tagged queueing
uhidev0 at uhub3 port 4 configuration 1 interface 0
uhidev0: Avocent USB Composite Device-0, rev 2.00/0.00, addr 2, iclass 3/1
ukbd0 at uhidev0
wskbd1 at ukbd0 mux 1
wskbd1: connecting to wsdisplay0
uhidev1 at uhub3 port 4 configuration 1 interface 1
uhidev1: Avocent USB Composite Device-0, rev 2.00/0.00, addr 2, iclass 3/1
ums0 at uhidev1: 3 buttons and Z dir
wsmouse1 at ums0 mux 0
uhidev2 at uhub3 port 4 configuration 1 interface 2
uhidev2: Avocent USB Composite Device-0, rev 2.00/0.00, addr 2, iclass 3/1
ums1 at uhidev2: 3 buttons and Z dir
wsmouse2 at ums1 mux 0
Kernelized RAIDframe activated
pad0: outputs: 44100Hz, 16-bit, stereo
audio0 at pad0: half duplex, playback, capture
boot device: sd0
root on sd0a dumps on sd0b
root file system type: ffs
ipmi0: version 2.0 interface KCS iobase 0xca2/2 spacing 1
ciss0: normal state on 'ciss0:0' (online)
ciss0: normal state on 'ciss0:1' (online)

 Xen 4.5.2
(XEN) Xen version 4.5.2 (pbulk@) (gcc (nb2 20150115) 4.8.4) debug=n Wed Jan 20 18:18:44 UTC 2016
(XEN) Latest ChangeSet: 
(XEN) Bootloader: unknown
(XEN) Command line: dom0_mem=2048M com1=115200,8n1,0x2f8,3 console=com1
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: none; EDID transfer time: 1 seconds
(XEN)  EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN)  Found 1 MBR signatures
(XEN)  Found 1 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 000000000009d400 (usable)
(XEN)  000000000009d400 - 00000000000a0000 (reserved)
(XEN)  00000000000e0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000bf6e0000 (usable)
(XEN)  00000000bf6ee000 - 00000000bf6f0000 type 9
(XEN)  00000000bf6f0000 - 00000000bf6fe000 (ACPI data)
(XEN)  00000000bf6fe000 - 00000000bf750000 (ACPI NVS)
(XEN)  00000000bf750000 - 00000000bf780000 (reserved)
(XEN)  00000000bf78c000 - 00000000c0000000 (reserved)
(XEN)  00000000e0000000 - 00000000f0000000 (reserved)
(XEN)  00000000fee00000 - 00000000fee01000 (reserved)
(XEN)  00000000ffc00000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 0000001240000000 (usable)
(XEN) ACPI: RSDP 000FADD0, 0024 (r2 ACPIAM)
(XEN) ACPI: XSDT BF6F0100, 008C (r1 110410 XSDT1337 20101104 MSFT       97)
(XEN) ACPI: FACP BF6F0290, 00F4 (r3 110410 FACP1337 20101104 MSFT       97)
(XEN) ACPI: DSDT BF6F05D0, 5DDD (r1  DS993 DS993B16      B16 INTL 20051117)
(XEN) ACPI: FACS BF6FE000, 0040
(XEN) ACPI: APIC BF6F0390, 01AE (r1 110410 APIC1337 20101104 MSFT       97)
(XEN) ACPI: SPCR BF6F0540, 0050 (r1 110410 SPCR1337 20101104 MSFT       97)
(XEN) ACPI: MCFG BF6F0590, 003C (r1 110410 OEMMCFG  20101104 MSFT       97)
(XEN) ACPI: SSDT BF6FA5D0, 002A (r1 OEM_ID OEMTBLID        1 INTL 20051117)
(XEN) ACPI: OEMB BF6FE040, 0083 (r1 110410 OEMB1337 20101104 MSFT       97)
(XEN) ACPI: HPET BF6FA600, 0038 (r1 110410 OEMHPET  20101104 MSFT       97)
(XEN) ACPI: DMAR BF6FE0D0, 0128 (r1    AMI  OEMDMAR        1 MSFT       97)
(XEN) ACPI: SSDT BF7033C0, 0363 (r1 DpgPmm    CpuPm       12 INTL 20051117)
(XEN) ACPI: EINJ BF6FA640, 0130 (r1  AMIER AMI_EINJ 20101104 MSFT       97)
(XEN) ACPI: BERT BF6FA7D0, 0030 (r1  AMIER AMI_BERT 20101104 MSFT       97)
(XEN) ACPI: ERST BF6FA800, 01B0 (r1  AMIER AMI_ERST 20101104 MSFT       97)
(XEN) ACPI: HEST BF6FA9B0, 00A8 (r1  AMIER ABC_HEST 20101104 MSFT       97)
(XEN) System RAM: 73718MB (75487732kB)
(XEN) Domain heap initialised
(XEN) Processor #0 6:12 APIC version 21
(XEN) Processor #2 6:12 APIC version 21
(XEN) Processor #4 6:12 APIC version 21
(XEN) Processor #16 6:12 APIC version 21
(XEN) Processor #18 6:12 APIC version 21
(XEN) Processor #20 6:12 APIC version 21
(XEN) Processor #32 6:12 APIC version 21
(XEN) Processor #34 6:12 APIC version 21
(XEN) Processor #36 6:12 APIC version 21
(XEN) Processor #48 6:12 APIC version 21
(XEN) Processor #50 6:12 APIC version 21
(XEN) Processor #52 6:12 APIC version 21
(XEN) Processor #1 6:12 APIC version 21
(XEN) Processor #3 6:12 APIC version 21
(XEN) Processor #5 6:12 APIC version 21
(XEN) Processor #17 6:12 APIC version 21
(XEN) Processor #19 6:12 APIC version 21
(XEN) Processor #21 6:12 APIC version 21
(XEN) Processor #33 6:12 APIC version 21
(XEN) Processor #35 6:12 APIC version 21
(XEN) Processor #37 6:12 APIC version 21
(XEN) Processor #49 6:12 APIC version 21
(XEN) Processor #51 6:12 APIC version 21
(XEN) Processor #53 6:12 APIC version 21
(XEN) IOAPIC[0]: apic_id 6, version 32, address 0xfec00000, GSI 0-23
(XEN) IOAPIC[1]: apic_id 7, version 32, address 0xfec8a000, GSI 24-47
(XEN) Enabling APIC mode:  Phys.  Using 2 I/O APICs
(XEN) Failed to get Error Log Address Range.
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 2133.505 MHz processor.
(XEN) Initing memory sharing.
(XEN) Intel VT-d iommu 0 supported page sizes: 4kB.
(XEN) Intel VT-d Snoop Control enabled.
(XEN) Intel VT-d Dom0 DMA Passthrough not enabled.
(XEN) Intel VT-d Queued Invalidation enabled.
(XEN) Intel VT-d Interrupt Remapping not enabled.
(XEN) Intel VT-d Shared EPT tables not enabled.
(XEN) I/O virtualisation enabled
(XEN)  - Dom0 mode: Relaxed
(XEN) Interrupt remapping disabled
(XEN) Enabled directed EOI with ioapic_ack_old on!
(XEN) ENABLING IO-APIC IRQs
(XEN)  -> Using old ACK method
(XEN) Platform timer is 14.318MHz HPET
(XEN) Allocated console ring of 64 KiB.
(XEN) VMX: Supported advanced features:
(XEN)  - APIC MMIO access virtualisation
(XEN)  - APIC TPR shadow
(XEN)  - Extended Page Tables (EPT)
(XEN)  - Virtual-Processor Identifiers (VPID)
(XEN)  - Virtual NMI
(XEN)  - MSR direct-access bitmap
(XEN)  - Unrestricted Guest
(XEN) HVM: ASIDs enabled.
(XEN) HVM: VMX enabled
(XEN) HVM: Hardware Assisted Paging (HAP) detected
(XEN) HVM: HAP page sizes: 4kB, 2MB, 1GB
(XEN) Brought up 24 CPUs
(XEN) Dom0 has maximum 1008 PIRQs
(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 64-bit, lsb, compat32
(XEN)  Dom0 kernel: 64-bit, lsb, paddr 0xffffffff80000000 -> 0xffffffff80e2f000
(XEN)  Dom0 symbol map 0xffffffff80e2f000 -> 0xffffffff80f5ea90
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   000000120a000000->000000120c000000 (516096 pages to be allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: ffffffff80000000->ffffffff80f5ea90
(XEN)  Init. ramdisk: ffffffff80f5f000->ffffffff80f5f000
(XEN)  Phys-Mach map: ffffffff80f5f000->ffffffff8135f000
(XEN)  Start info:    ffffffff8135f000->ffffffff8135f4b4
(XEN)  Page tables:   ffffffff81360000->ffffffff8136d000
(XEN)  Boot stack:    ffffffff8136d000->ffffffff8136e000
(XEN)  TOTAL:         ffffffff80000000->ffffffff81400000
(XEN)  ENTRY ADDRESS: ffffffff80100000
(XEN) Dom0 has maximum 24 VCPUs
(XEN) Scrubbing Free RAM on 1 nodes using 12 CPUs
(XEN) .................................................done.
(XEN) Initial low memory virq threshold set at 0x4000 pages.
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen)
(XEN) Freed 284kB init memory.
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 7.0_STABLE (XEN3_DOM0.201603192110Z)
total memory = 2048 MB
avail memory = 1967 MB
kern.module.path=/stand/amd64/7.0/modules
mainbus0 (root)
ACPI: RSDP 0xfadd0 000024 (v02 ACPIAM)
ACPI: XSDT 0xbf6f0100 00008C (v01 110410 XSDT1337 20101104 MSFT 00000097)
ACPI: FACP 0xbf6f0290 0000F4 (v03 110410 FACP1337 20101104 MSFT 00000097)
ACPI BIOS Warning (bug): 32/64X length mismatch in FADT/Gpe0Block: 128/64 (20131218/tbfadt-634)
ACPI: DSDT 0xbf6f05d0 005DDD (v01  DS993 DS993B16 00000B16 INTL 20051117)
ACPI: FACS 0xbf6fe000 000040
ACPI: APIC 0xbf6f0390 0001AE (v01 110410 APIC1337 20101104 MSFT 00000097)
ACPI: SPCR 0xbf6f0540 000050 (v01 110410 SPCR1337 20101104 MSFT 00000097)
ACPI: MCFG 0xbf6f0590 00003C (v01 110410 OEMMCFG  20101104 MSFT 00000097)
ACPI: SSDT 0xbf6fa5d0 00002A (v01 OEM_ID OEMTBLID 00000001 INTL 20051117)
ACPI: OEMB 0xbf6fe040 000083 (v01 110410 OEMB1337 20101104 MSFT 00000097)
ACPI: HPET 0xbf6fa600 000038 (v01 110410 OEMHPET  20101104 MSFT 00000097)
ACPI: XMAR 0xbf6fe0d0 000128 (v01    AMI  OEMDMAR 00000001 MSFT 00000097)
ACPI: SSDT 0xbf7033c0 000363 (v01 DpgPmm    CpuPm 00000012 INTL 20051117)
ACPI: EINJ 0xbf6fa640 000130 (v01  AMIER AMI_EINJ 20101104 MSFT 00000097)
ACPI: BERT 0xbf6fa7d0 000030 (v01  AMIER AMI_BERT 20101104 MSFT 00000097)
ACPI: ERST 0xbf6fa800 0001B0 (v01  AMIER AMI_ERST 20101104 MSFT 00000097)
ACPI: HEST 0xbf6fa9b0 0000A8 (v01  AMIER ABC_HEST 20101104 MSFT 00000097)
ACPI: All ACPI Tables successfully acquired
ioapic0 at mainbus0 apid 6
(XEN) ioapic_guest_write: apic=0, pin=0, irq=0
(XEN) ioapic_guest_write: new_entry=000100f0
(XEN) ioapic_guest_write: old_entry=00010000 pirq=-1
(XEN) ioapic_guest_write: Attempt to modify IO-APIC pin for in-use IRQ!
(XEN) ioapic_guest_write: apic=0, pin=2, irq=0
(XEN) ioapic_guest_write: new_entry=000100f0
(XEN) ioapic_guest_write: old_entry=000000f0 pirq=-1
(XEN) ioapic_guest_write: Attempt to modify IO-APIC pin for in-use IRQ!
(XEN) ioapic_guest_write: apic=0, pin=3, irq=3
(XEN) ioapic_guest_write: new_entry=000100f1
(XEN) ioapic_guest_write: old_entry=000000f1 pirq=-1
(XEN) ioapic_guest_write: Attempt to modify IO-APIC pin for in-use IRQ!
ioapic1 at mainbus0 apid 7
ioapic1: can't remap to apid 7
cpu0 at mainbus0 apid 0
cpu1 at mainbus0 apid 2
cpu2 at mainbus0 apid 4
cpu3 at mainbus0 apid 16
cpu4 at mainbus0 apid 18
cpu5 at mainbus0 apid 20
cpu6 at mainbus0 apid 32
cpu7 at mainbus0 apid 34
cpu8 at mainbus0 apid 36
cpu9 at mainbus0 apid 48
cpu10 at mainbus0 apid 50
cpu11 at mainbus0 apid 52
cpu12 at mainbus0 apid 1
cpu13 at mainbus0 apid 3
cpu14 at mainbus0 apid 5
cpu15 at mainbus0 apid 17
cpu16 at mainbus0 apid 19
cpu17 at mainbus0 apid 21
cpu18 at mainbus0 apid 33
cpu19 at mainbus0 apid 35
cpu20 at mainbus0 apid 37
cpu21 at mainbus0 apid 49
cpu22 at mainbus0 apid 51
cpu23 at mainbus0 apid 53
ipmi0 at mainbus0
hypervisor0 at mainbus0: Xen version 4.5.2
vcpu0 at hypervisor0: Intel(R) Xeon(R) CPU           L5639  @ 2.13GHz, id 0x206c2
xenbus0 at hypervisor0: Xen Virtual Bus Interface
xencons0 at hypervisor0: Xen Virtual Console Driver
acpi0 at hypervisor0: Intel ACPICA 20131218
IOH (PNP0C01) at acpi0 not configured
TMR (PNP0100) at acpi0 not configured
pcppi0 at acpi0 (SPKR, PNP0800): io 0x61
UAR2 (PNP0501) at acpi0 not configured
SIOR (PNP0C02) at acpi0 not configured
RMSC (PNP0C02) at acpi0 not configured
HPET (PNP0103) at acpi0 not configured
OMSC (PNP0C02) at acpi0 not configured
PCIE (PNP0C02) at acpi0 not configured
RMEM (PNP0C01) at acpi0 not configured
acpibut0 at acpi0 (PWRB, PNP0C0C-170): ACPI Power Button
MI0 (IPI0001) at acpi0 not configured
ACPI: Enabled 2 GPEs in block 00 to 3F
ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S2_] (20131218/hwxface-646)
ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S3_] (20131218/hwxface-646)
pci0 at hypervisor0 bus 0: configuration mode 1
pchb0 at pci0 dev 0 function 0: vendor 0x8086 product 0x3403 (rev. 0x22)
ppb0 at pci0 dev 1 function 0: vendor 0x8086 product 0x3408 (rev. 0x22)
ppb0: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x2 @ 5.0GT/s
pci1 at ppb0 bus 1
ppb1 at pci0 dev 2 function 0: vendor 0x8086 product 0x3409 (rev. 0x22)
ppb1: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x2 @ 5.0GT/s
pci2 at ppb1 bus 2
ppb2 at pci0 dev 3 function 0: vendor 0x8086 product 0x340a (rev. 0x22)
ppb2: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x4 @ 5.0GT/s
pci3 at ppb2 bus 3
ppb3 at pci0 dev 7 function 0: vendor 0x8086 product 0x340e (rev. 0x22)
ppb3: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x16 @ 5.0GT/s
ppb3: link is x8 @ 5.0GT/s
pci4 at ppb3 bus 4
ciss0 at pci4 dev 0 function 0: HP Smart Array 11
ciss0: interrupting at ioapic1 pin 6, event channel 4
ciss0: 2 LDs, HW rev 2, FW 6.40/6.40, 64bit fifo rro
scsibus0 at ciss0: 2 targets, 1 lun per target
vendor 0x8086 product 0x342d (interrupt system, IO(x) APIC, revision 0x22) at pci0 dev 19 function 0 not configured
vendor 0x8086 pro (interrupt system, generic 8259, revision 0x22) at pci0 dev 20 function 0 not configured
vendor 0x8086 product 0x3422 (interrupt system, generic 8259, revision 0x22) at pci0 dev 20 function 1 not configured
vendor 0x8086 product 0x3423 (interrupt system, generic 8259, revision 0x22) at pci0 dev 20 function 2 not configured
vendor 0x8086 product 0x3438 (interrupt system, generic 8259, revision 0x22) at pci0 dev 20 function 3 not configured
vendor 0x8086 product 0x3430 (miscellaneous system, revision 0x22) at pci0 dev 22 function 0 not configured
vendor 0x8086 product 0x3431 (miscellaneous system, revision 0x22) at pci0 dev 22 function 1 not configured
vendor 0x8086 product 0x3432 (miscellaneous system, revision 0x22) at pci0 dev 22 function 2 not configured
vendor 0x8086 product 0x3433 (miscellaneous system, revision 0x22) at pci0 dev 22 function 3 not configured
vendor 0x8086 product 0x3429 (miscellaneous system, revision 0x22) at pci0 dev 22 function 4 not configured
vendor 0x8086 product 0x342a (miscellaneous system, revision 0x22) at pci0 dev 22 function 5 not configured
vendor 0x8086 product 0x342b (miscellaneous system, revision 0x22) at pci0 dev 22 function 6 not configured
vendor 0x8086 product 0x342c (miscellaneous system, revision 0x22) at pci0 dev 22 function 7 not configured
uhci0 at pci0 dev 26 function 0: vendor 0x8086 product 0x3a37 (rev. 0x00)
uhci0: interrupting at ioapic0 pin 23, event channel 5
usb0 at uhci0: USB revision 1.0
uhci1 at pci0 dev 26 function 1: vendor 0x8086 product 0x3a38 (rev. 0x00)
uhci1: interrupting at ioapic0 pin 22, event channel 6
usb1 at uhci1: USB revision 1.0
uhci2 at pci0 dev 26 function 2: vendor 0x8086 product 0x3a39 (rev. 0x00)
uhci2: interrupting at ioapic0 pin 21, event channel 7
usb2 at uhci2: USB revision 1.0
ehci0 at pci0 dev 26 function 7: vendor 0x8086 product 0x3a3c (rev. 0x00)
ehci0: interrupting at ioapic0 pin 20, event channel 8
ehci0: companion controllers, 2 ports each: uhci0 uhci1 uhci2
usb3 at ehci0: USB revision 2.0
ppb4 at pci0 dev 28 function 0: vendor 0x8086 product 0x3a40 (rev. 0x00)
ppb4: PCI Express capability version 1 <Root Port of PCI-E Root Complex> x4 @ 2.5GT/s
pci5 at ppb4 bus 5
wm0 at pci5 dev 0 function 0: 82576 1000BaseT Ethernet (rev. 0x01)
wm0: interrupting at ioapic0 pin 16, event channel 9
wm0: Ethernet address e8:9a:8f:14:17:c8
igphy0 at wm0 phy 1: i82566 10/100/1000 media interface, rev. 1
igphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
wm1 at pci5 dev 0 function 1: 82576 1000BaseT Ethernet (rev. 0x01)
wm1: interrupting at ioapic0 pin 17, event channel 10
wm1: Ethernet address e8:9a:8f:14:17:c9
igphy1 at wm1 phy 1: i82566 10/100/1000 media interface, rev. 1
igphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
uhci3 at pci0 dev 29 function 0: vendor 0x8086 product 0x3a34 (rev. 0x00)
uhci3: interrupting at ioapic0 pin 23, event channel 5
usb4 at uhci3: USB revision 1.0
uhci4 at pci0 dev 29 function 1: vendor 0x8086 product 0x3a35 (rev. 0x00)
uhci4: interrupting at ioapic0 pin 22, event channel 6
usb5 at uhci4: USB revision 1.0
uhci5 at pci0 dev 29 function 2: vendor 0x8086 product 0x3a36 (rev. 0x00)
uhci5: interrupting at ioapic0 pin 21, event channel 7
usb6 at uhci5: USB revision 1.0
ehci1 at pci0 dev 29 function 7: vendor 0x8086 product 0x3a3a (rev. 0x00)
ehci1: interrupting at ioapic0 pin 23, event channel 5
ehci1: companion controllers, 2 ports each: uhci3 uhci4 uhci5
usb7 at ehci1: USB revision 2.0
ppb5 at pci0 dev 30 function 0: vendor 0x8086 product 0x244e (rev. 0x90)
pci6 at ppb5 bus 7
vga0 at pci6 dev 11 function 0: vendor 0x1a03 product 0x2000 (rev. 0x10)
wsdisplay0 at vga0 kbdmux 1
drm at vga0 not configured
ichlpcib0 at pci0 dev 31 function 0: vendor 0x8086 product 0x3a16 (rev. 0x00)
ichlpcib0: 24-bit timer
ichlpcib0: TCO timer reboot disabled by hardware; hope SMBIOS properly handles it.
vendor 0x8086 product 0x3a30 (SMBus serial bus) at pci0 dev 31 function 3 not configured
isa0 at ichlpcib0
pckbc0 at isa0 port 0x60-0x64
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0 mux 1
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
scsibus0: waiting 2 seconds for devices to settle...
uhub0 at usb0: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1 at usb1: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2 at usb2: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub3 at usb3: vendor 0x8086 EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub4 at usb4: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub5 at usb5: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub6 at usb6: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub7 at usb7: vendor 0x8086 EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
sd0 at scsibus0 target 0 lun 0: <HP, LOGICAL VOLUME, 6.40> disk fixed
sd0: 99 GB, 25700 cyl, 255 head, 32 sec, 512 bytes/sect x 209712000 sectors
sd0: async, 8-bit transfers, tagged queueing
sd1 at scsibus0 target 1 lun 0: <HP, LOGICAL VOLUME, 6.40> disk fixed
sd1: 1688 GB, 65535 cyl, 255 head, 211 sec, 512 bytes/sect x 3540926640 sectors
sd1: async, 8-bit transfers, tagged queueing
uhidev0 at uhub3 port 4 configuration 1 interface 0
uhidev0: Avocent USB Composite Device-0, rev 2.00/0.00, addr 2, iclass 3/1
ukbd0 at uhidev0
wskbd1 at ukbd0 mux 1
uhidev1 at uhub3 port 4 configuration 1 interface 1
uhidev1: Avocent USB Composite Device-0, rev 2.00/0.00, addr 2, iclass 3/1
ums0 at uhidev1: 3 buttons and Z dir
wsmouse1 at ums0 mux 0
uhidev2 at uhub3 port 4 configuration 1 interface 2
uhidev2: Avocent USB Composite Device-0, rev 2.00/0.00, addr 2, iclass 3/1
ums1 at uhidev2: 3 buttons and Z dir
wsmouse2 at ums1 mux 0
boot device: sd0
root on sd0a dumps on sd0b
Your machine does not initialize mem_clusters; sparse_dumps disabled
root file system type: ffs
Sun Mar 20 15:54:55 UTC 2016

Follow-Ups:
- Re: Interrupt time inflation on Xen
  - From: Thor Lancelot Simon

References:
- Interrupt time inflation on Xen
  - From: Thor Lancelot Simon

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