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KVM使用原生CPU[转]

2012-09-04 16:56:40| 分类： Linux | 标签： |举报 |字号大中小订阅

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默认情况下 CentOS 6 安装虚拟机后的CPU是：QEMU Virtual CPU，一般使用是没有问题的，只是性能低下，PHP一个10万次循环的脚本居然需要执行50多秒，而母系统执行只需2秒多，差距有点儿太大。
```
# virsh edit vm_name <domain type='kvm'>   ......   <qemu:commandline>     <qemu:arg value='-cpu'/>     <qemu:arg value='host'/>   </qemu:commandline> </domain> 
```
一般建议使用 virsh edit 编辑虚拟机配置文件，避免文件被破坏

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