[Qemu-discuss] Which vCPU has better performance?

[xuanmao_001]

Hi,

I tested some vcpu with qemu-kvm(such like host, core2duo, Nehalem, Penryn), but I can't see obvious performance difference? Any body can give me some ideas?

my command line like follow:

/usr/libexec/qemu-kvm -cpu host -m 2048 -enable-kvm -drive file=/var/lib/libvirt/images/Test_Performance.img,cache=writeback,if=virtio -localtime -net nic,model=virtio,macaddr=52:54:00:25:05:90 -net tap,ifname=tap0,script=/tmp/qemu-ifup -vnc 0.0.0.0:1  -vga std

 

I only changed parameter -cpu like "core2duo, Nehalem, Penryn ..."

 

Host HW info: CPU is Intel Celeron E3400 @ 2.60GHz, 4GB Memory.

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xuanmao_001