关于虚拟化：KVM和libvirt：虚拟主机中的CPU类型错误

KVM and libvirt: wrong CPU type in virtual host

我们在6核(12 HT核)计算机上使用KVM和libvirt进行虚拟化。

问题：虚拟主机中的CPU类型错误。

使用的KVM，libvirt，内核版本：

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libvirt version: 0.9.8
QEMU emulator version 1.0 (qemu-kvm-1.0), Copyright (c) 2003-2008 Fabrice Bellard
Ubuntu 12.04.1 LTS
kernel: 3.2.0-32-generic x86_64

/usr/share/libvirt/cpu_map.xml不支持比Westmare更多的最新cpu类型。

我是否完全需要对CPU进行这种虚拟化？由于某些原因，我们需要在虚拟主机中获得最大的cpu性能。我的虚拟机中可以使用服务器的i7-3930K [email protected]的某些内核。

也许我们也做过muczh虚拟化...？

我的虚拟主机的xml如下：在哪里可以设置cpu -host标志？

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<domain type='kvm'>
<name>myVirtualServer</name>
<uuid>2344481d-f455-455e-9558</uuid>
<description>Test-Server</description>
<memory>4194304</memory>
<currentMemory>4194304</currentMemory>
<vcpu>2</vcpu>
<cpu match='exact'>
<model>Westmere</model>
<vendor>Intel</vendor>
</cpu>
<os>
<type arch='x86_64' machine='pc-1.0'>hvm</type>
<boot dev='hd'/>
</os>
<features>

<pae/>
</features>

$ lscpu的具有HT的6(12)个内核的物理服务器

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Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 12
On-line CPU(s) list: 0-11
Thread(s) per core: 2
Core(s) per socket: 6
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 45
Stepping: 7
CPU MHz: 1200.000
BogoMIPS: 6400.05
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 12288K
NUMA node0 CPU(s): 0-11

$ lscpu虚拟服务器(错误的CPU类型，错误的L2-Cache，错误的MHz)

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Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 2
On-line CPU(s) list: 0,1
Thread(s) per core: 1
Core(s) per socket: 1
Socket(s): 2
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 15
Stepping: 11
CPU MHz: 3200.012
BogoMIPS: 6400.02
Virtualisation: VT-x
Hypervisor vendor: KVM
Virtualisation type: full
L1d cache: 32K
L1i cache: 32K
L2 cache: 4096K
NUMA node0 CPU(s): 0,1