Hi,
I'm new to KVM and have some questions regarding kvm cpu emulation,
hope you can answer them.
I have a kvm node with Dual-Core AMD Opteron(tm) Processor 2218 processors.
1)I was wondering choosing what cpu emulation for VM would give best
performance?
I get the following options
# kvm -cpu ?
x86 qemu64
x86 phenom
x86 core2duo
x86 qemu32
x86 coreduo
x86 486
x86 pentium
x86 pentium2
x86 pentium3
x86 athlon
x86 n270
#
I was thinking one of qemu64/phenom/athlon .
Does It matter what 64bit cpu emulation i choose?
What would be chosen if I omit the -cpu option?
2) I want to optimize/recompile a gentoo VM system packages for the
chosen cpu - if that matters.
Does rebuilding the VM packages to fine tuned for the emulated cpu give
any advantages?
3) Do I have to boot a VM kernel with guest viritio drivers, to get a
not emulated real cpu access - like I have in Xen?
Thanks a lot.
Alex
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