关于CPU型号的定义: libvirt 对CPU的定义提炼出标准的几种类型在 /usr/share/libvirt/cpu_map.xml 可以查到 "486", "pentium", "pentium2", "pentiumpro", "coreduo", "n270", "pentiumpro", "qemu32", "kvm32", "cpu64-rhel5", "cpu64-rhel5", "kvm64", "pentiumpro", "Conroe" "Penryn", "Nehalem", "Westmere", "pentiumpro", "cpu64-rhel5", "cpu64-rhel5", "Opteron_G1", "Opteron_G2", "Opteron_G3, "Opteron_G4" CPU配置模式可以有以下几种种模式: custom 自己定义 host-model 根据物理CPU的特性,选择一个最靠近的标准CPU型号,xml配置文件为: <cpu mode='host-model'> <model fallback='forbid'/> <topology sockets='1' cores='2' threads='1'/> </cpu> host-passthrough 直接将物理CPU 暴露给虚拟机使用,在虚拟机上完全可以看到的就是物理CPU的型号;xml配置文件为: <cpu mode='host-passthrough'/> 这种方式是CPU性能最好的,也可以适用于有些应用检查CPU某些特性;但是虚拟机不能迁移到不同型号的CPU上;