以下のページを参考にやってみました。
Virtioに対応する前
root@sv96:/root # dd if=/dev/zero of=./1g bs=1m count=1024
1024+0 records in
1024+0 records out
1073741824 bytes transferred in 39.466677 secs (27206289 bytes/sec)
Virtioに対応した後
root@sv96:/home/tatsuya # dd if=/dev/zero of=./1g bs=1m count=1024
1024+0 records in
1024+0 records out
1073741824 bytes transferred in 27.950253 secs (38416175 bytes/sec)
dmesg はこんな感じ。
Copyright (c) 1992-2012 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 9.1-RELEASE #0 r243825: Tue Dec 4 09:23:10 UTC 2012
root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
CPU: Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz (2593.83-MHz K8-class CPU)
Origin = “GenuineIntel” Id = 0x206d7 Family = 6 Model = 2d Stepping = 7
Features=0xf83fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2,SS>
Features2=0x9eba2203<SSE3,PCLMULQDQ,SSSE3,CX16,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,AESNI,XSAVE,OSXSAVE,AVX,HV>
AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
AMD Features2=0x1<LAHF>
real memory = 1073741824 (1024 MB)
avail memory = 1009643520 (962 MB)
Event timer “LAPIC” quality 400
ACPI APIC Table: <BOCHS BXPCAPIC>
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 2 package(s) x 1 core(s)
cpu0 (BSP): APIC ID: 0
cpu1 (AP): APIC ID: 1
ioapic0: Changing APIC ID to 2
ioapic0 <Version 1.1> irqs 0-23 on motherboard
kbd1 at kbdmux0
acpi0: <BOCHS BXPCRSDT> on motherboard
acpi0: Power Button (fixed)
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
atrtc0: <AT realtime clock> port 0x70-0x71,0x72-0x77 irq 8 on acpi0
Event timer “RTC” frequency 32768 Hz quality 0
hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
Timecounter “HPET” frequency 100000000 Hz quality 950
Timecounter “ACPI-fast” frequency 3579545 Hz quality 900
acpi_timer0: <24-bit timer at 3.579545MHz> port 0xb008-0xb00b on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pci_link4: Unable to route IRQs: AE_NOT_FOUND
isab0: <PCI-ISA bridge> at device 1.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX3 WDMA2 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xc0e0-0xc0ef at device 1.1 on pci0
ata0: <ATA channel> at channel 0 on atapci0
ata1: <ATA channel> at channel 1 on atapci0
uhci0: <Intel 82371SB (PIIX3) USB controller> port 0xc080-0xc09f irq 11 at device 1.2 on pci0
usbus0: controller did not stop
usbus0 on uhci0
pci0: <bridge> at device 1.3 (no driver attached)
vgapci0: <VGA-compatible display> mem 0xfc000000-0xfdffffff,0xfebf0000-0xfebf0fff at device 2.0 on pci0
virtio_pci0: <VirtIO PCI Network adapter> port 0xc0a0-0xc0bf mem 0xfebf1000-0xfebf1fff irq 11 at device 3.0 on pci0
vtnet0: <VirtIO Networking Adapter> on virtio_pci0
virtio_pci0: host features: 0x711fffe3 <EventIdx,RingIndirect,NotifyOnEmpty,RxModeExtra,VLanFilter,RxMode,ControlVq,Status,MrgRxBuf,TxUFO,TxTSOECN,TxTSOv6,TxTSOv4,RxUFO,RxECN,RxTSOv6,RxTSOv4,TxAllGSO,MacAddress,RxChecksum,TxChecksum>
virtio_pci0: negotiated features: 0x110fbba3 <RingIndirect,NotifyOnEmpty,VLanFilter,RxMode,ControlVq,Status,MrgRxBuf,TxTSOECN,TxTSOv6,TxTSOv4,RxECN,RxTSOv6,RxTSOv4,MacAddress,RxChecksum,TxChecksum>
vtnet0: Ethernet address: fa:16:3e:00:11:c0
virtio_pci1: <VirtIO PCI Block adapter> port 0xc000-0xc03f mem 0xfebf2000-0xfebf2fff irq 11 at device 4.0 on pci0
vtblk0: <VirtIO Block Adapter> on virtio_pci1
virtio_pci1: host features: 0x71000654 <EventIdx,RingIndirect,NotifyOnEmpty,Topology,FlushCmd,BlockSize,DiskGeometry,MaxNumSegs>
virtio_pci1: negotiated features: 0x10000254 <RingIndirect,FlushCmd,BlockSize,DiskGeometry,MaxNumSegs>
vtblk0: 20480MB (41943040 512 byte sectors)
virtio_pci2: <VirtIO PCI Block adapter> port 0xc040-0xc07f mem 0xfebf3000-0xfebf3fff irq 10 at device 5.0 on pci0
vtblk1: <VirtIO Block Adapter> on virtio_pci2
virtio_pci2: host features: 0x71000654 <EventIdx,RingIndirect,NotifyOnEmpty,Topology,FlushCmd,BlockSize,DiskGeometry,MaxNumSegs>
virtio_pci2: negotiated features: 0x10000254 <RingIndirect,FlushCmd,BlockSize,DiskGeometry,MaxNumSegs>
vtblk1: 81920MB (167772160 512 byte sectors)
virtio_pci3: <VirtIO PCI Balloon adapter> port 0xc0c0-0xc0df irq 10 at device 6.0 on pci0
vtballoon0: <VirtIO Balloon Adapter> on virtio_pci3
virtio_pci3: host features: 0x71000002 <EventIdx,RingIndirect,NotifyOnEmpty,StatsVq>
virtio_pci3: negotiated features: 0x0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model IntelliMouse Explorer, device ID 4
fdc0: <floppy drive controller> port 0x3f2-0x3f5,0x3f7 irq 6 drq 2 on acpi0
fdc0: does not respond
device_attach: fdc0 attach returned 6
uart0: <16550 or compatible> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
attimer0: <AT timer> at port 0x40 on isa0
Timecounter “i8254” frequency 1193182 Hz quality 0
Event timer “i8254” frequency 1193182 Hz quality 100
fdc0: No FDOUT register!
ppc0: cannot reserve I/O port range
ctl: CAM Target Layer loaded
Timecounters tick every 10.000 msec
usbus0: 12Mbps Full Speed USB v1.0
ugen0.1: <Intel> at usbus0
uhub0: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
uhub0: 2 ports with 2 removable, self powered
ugen0.2: <QEMU 1.0> at usbus0
uhid0: <QEMU 1.0 QEMU USB Tablet, class 0/0, rev 1.00/0.00, addr 2> on usbus0
cd0 at ata0 bus 0 scbus0 target 0 lun 0
cd0: <QEMU QEMU DVD-ROM 1.0> Removable CD-ROM SCSI-0 device
cd0: 16.700MB/s transfers (WDMA2, ATAPI 12bytes, PIO 65534bytes)
cd0: Attempt to query device size failed: NOT READY, Medium not present
SMP: AP CPU #1 Launched!
Trying to mount root from ufs:/dev/vtbd0p2 [rw]…
まぁ、当たり前な気がするけど、IPv6の問題は治りませんでした。