Performance of Win 2008 R2 in Hyper-V and KVM

[docent]

Hi everyone,

I have two identical computers: HP DL180G5, E5405, 12GB RAM, several SATA disks.
I have installed Hyper-V 2008 R2 on the first server and Proxmox 2.0 on the second. On both servers I installed Windows 2008 R2 with 1 virtual CPU.
I ran Crystal Disk Mark on both VMs. The result You can see here (Hyper-V) and here (KVM).
However, when I restore Firebird databases on both VMs I see different result: restore the database in the Hyper-V is more then three times faster than in KVM.

 

[tom]

Post details about your storage setup, physical configuration and virtual disk config and VM config.

 

[tom]

also, do not link to pages outside this forum, all logs and screenshots needs to stored here.

 

[docent]

#cat 100.conf
name: Aurum
cpu: core2duo
sockets: 1
cores: 1
memory: 3072
ide0: vg1:vm-100-disk-1,cache=writeback
ide1: ram:100/vm-100-disk-1.qcow2
ide2: local:iso/virtio-win-0.1-15.iso,media=cdrom
ide3: vg2:vm-100-disk-1,cache=writeback
bootdisk: ide0
ostype: win7
net0: e1000=86:CF:2B:33:A0:A4,bridge=vmbr0
args: -no-hpet -no-kvm-pit-reinjection

# pveversion -v
pve-manager: 2.0-18 (pve-manager/2.0/16283a5a)
running kernel: 2.6.32-6-pve
proxmox-ve-2.6.32: 2.0-55
pve-kernel-2.6.32-6-pve: 2.6.32-55
lvm2: 2.02.88-2pve1
clvm: 2.02.88-2pve1
corosync-pve: 1.4.1-1
openais-pve: 1.1.4-1
libqb: 0.6.0-1
redhat-cluster-pve: 3.1.8-3
pve-cluster: 1.0-17
qemu-server: 2.0-13
pve-firmware: 1.0-14
libpve-common-perl: 1.0-11
libpve-access-control: 1.0-5
libpve-storage-perl: 2.0-9
vncterm: 1.0-2
vzctl: 3.0.29-3pve8
vzprocps: 2.0.11-2
vzquota: 3.0.12-3
pve-qemu-kvm: 1.0-1
ksm-control-daemon: 1.1-1

# cat /var/log/dmesg
...
scsi0 : ahci
scsi1 : ahci
scsi2 : ahci
scsi3 : ahci
ata1: SATA max UDMA/133 abar m2048@0xfccff000 port 0xfccff100 irq 33
ata2: SATA max UDMA/133 irq_stat 0x00400040, connection status changed irq 33
ata3: SATA max UDMA/133 irq_stat 0x00400040, connection status changed irq 33
ata4: SATA max UDMA/133 irq_stat 0x00400040, connection status changed irq 33
ata_piix 0000:00:1f.5: version 2.13
ata_piix 0000:00:1f.5: PCI INT B -> GSI 19 (level, low) -> IRQ 19
ata_piix 0000:00:1f.5: MAP [ P0 -- P1 -- ]
ata_piix 0000:00:1f.5: setting latency timer to 64
scsi4 : ata_piix
scsi5 : ata_piix
ata5: SATA max UDMA/133 cmd 0xe000 ctl 0xdc00 bmdma 0xd480 irq 19
ata6: SATA max UDMA/133 cmd 0xd880 ctl 0xd800 bmdma 0xd488 irq 19
ata5: SATA link down (SStatus 0 SControl 310)
ata6: SATA link down (SStatus 0 SControl 310)
ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata1.00: ATA-8: WDC WD5002ABYS-01B1B0, 02.03B02, max UDMA/133
ata1.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
ata1.00: configured for UDMA/133
scsi 0:0:0:0: Direct-Access     ATA      WDC WD5002ABYS-0 02.0 PQ: 0 ANSI: 5
sd 0:0:0:0: [sda] 976773168 512-byte logical blocks: (500 GB/465 GiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
sd 0:0:0:0: [sda] Attached SCSI disk
 sda: sda1 sda2
sd 0:0:0:0: [sda] Attached SCSI disk
ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata2.00: ATA-8: WDC WD5002ABYS-01B1B0, 02.03B02, max UDMA/133
ata2.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
ata2.00: configured for UDMA/133
scsi 1:0:0:0: Direct-Access     ATA      WDC WD5002ABYS-0 02.0 PQ: 0 ANSI: 5
sd 1:0:0:0: [sdb] 976773168 512-byte logical blocks: (500 GB/465 GiB)
sd 1:0:0:0: [sdb] Write Protect is off
sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00
sd 1:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
sd 1:0:0:0: [sdb] Attached SCSI disk
 sdb: sdb1
sd 1:0:0:0: [sdb] Attached SCSI disk
...

# pvs
  PV         VG   Fmt  Attr PSize   PFree
  /dev/sda2  vg1  lvm2 a--  464.83g 536.00m
  /dev/sdb1  vg2  lvm2 a--  465.76g 191.76g

# vgs
  VG   #PV #LV #SN Attr   VSize   VFree
  vg1    1   5   0 wz--n- 464.83g 536.00m
  vg2    1   4   0 wz--n- 465.76g 191.76g

# lvs
  LV            VG   Attr   LSize   Origin Snap%  Move Log Copy%  Convert
  containers    vg1  -wi-ao 302.00g
  root          vg1  -wi-ao  93.13g
  swap_1        vg1  -wi-ao  11.18g
  vm-100-disk-1 vg1  -wi-ao  50.00g
  vm-101-disk-1 vg1  -wi-ao   8.00g
  vm-100-disk-1 vg2  -wi-ao 200.00g

# cat storage.cfg
dir: local
        path /var/lib/vz
        content images,iso,vztmpl,backup,rootdir

lvm: vg1
        vgname vg1
        content images

dir: ct1
        path /mnt/containers
        content rootdir

dir: ram
        path /mnt/ramdisk
        content images

lvm: vg2
        vgname vg2
        content images

 

[e100]

I would suggest using virtio with the fedora drivers and changing to cache=none.