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[Qemu-discuss] Which vCPU has better performance?

From: xuanmao_001
Subject: [Qemu-discuss] Which vCPU has better performance?
Date: Tue, 4 Dec 2012 18:44:10 +0800

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  -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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