i/o performance

[nans_nans1 at yahoo.de]

In Proxmox the storage is configured as "virtio0".

I attached a part of dmesg:

atapci0: <Intel PIIX3 WDMA2 controller> port 0xc0a0-0xc0af,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 1.1 on pci0
ata0: <ATA channel 0> on atapci0
ata1: <ATA channel 1> on atapci0
disk scheduler: set policy of acd0 to noop
acd0: DVDROM <QEMU DVD-ROM/2.1.2> at ata1-master WDMA2
uhci0: <Intel 82371SB (PIIX3) USB controller> port 0xc040-0xc05f irq 11 at device 1.2 on pci0
usbus0: controller did not stop
usbus0: <Intel 82371SB (PIIX3) USB controller> on uhci0
pci0: <bridge> (vendor 0x8086, dev 0x7113) at device 1.3 irq 9
vgapci0: <VGA-compatible display> mem 0xfebf0000-0xfebf0fff,0xfc000000-0xfdffffff at device 2.0 on pci0
vgapci0: Boot video device
virtio_pci0: <VirtIO PCI Balloon adapter> port 0xc060-0xc07f irq 11 at device 3.0 on pci0
virtio_pci1: <VirtIO PCI Block adapter> port 0xc000-0xc03f mem 0xfebf1000-0xfebf1fff irq 10 at device 10.0 on pci0
vtblk0: <VirtIO Block Adapter> on virtio_pci1
virtio_pci1: host features: 0x71000ed4 <EventIdx,0x10000000,NotifyOnEmpty,0x800,Topology,FlushCmd,SCSICmds,BlockSize,DiskGeometry,MaxNumSegs>
virtio_pci1: negotiated features: 0x254 <FlushCmd,BlockSize,DiskGeometry,MaxNumSegs>
disk scheduler: set policy of vbd0 to noop