Hello,
I am little bit disappointed about virtio perormance.
speaking about virtio disk performance I get about the same performances
of non-virtio quests.
I am using centos 5.3 2.6.18-128.1.6.el5 as host and the same centos
5.3 2.6.18-128.1.6.el5 as kvm
guests with virtio backported to CentOS 5.2 kernel
virtio_net 47169 0
virtio_blk 41417 3
virtio_pci 41921 0
virtio_ring 37441 1 virtio_pci
virtio 39365 3 virtio_net,virtio_blk,virtio_pci
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
9.1G 1.5G 7.2G 17% /
/dev/vda1 99M 19M 76M 20% /boot
tmpfs 502M 0 502M 0% /dev/shm
I use bonnie++ for I/O tests and I got closely the same results for
virtio guests and non-virtio guests.
Anyone experienced something different ?
Speaking about virtio net performance I get good results but they are
not symmetric.
on a virtio guest I get ~1Gb/s inbound and ~600Mb/s outbound
without virtio I get ~600Gb/s inbound and ~200MB/s outbound
anyone has any idea how come hte performance is not symmetric ?
thanks
Rick
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