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[Xen-users] Make 2, 3 & 4 V-CPU HVMs appear as a one socket multicore CPU


  • To: <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "Robert Dunkley" <Robert@xxxxxxxxx>
  • Date: Wed, 1 Oct 2008 12:57:21 +0100
  • Delivery-date: Wed, 01 Oct 2008 04:59:56 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Thread-index: AckjvNyDr+/56UnmSS24O/tPnBenOA==
  • Thread-topic: Make 2, 3 & 4 V-CPU HVMs appear as a one socket multicore CPU

I have read the examples like the one below but still do not understand how I can make 2, 3 and 4 VCPU system appear as a single socket multi core CPU in the HVM. Does anyone know what I would have to set the CPUID to in order to achieve this?

 

Example:

+# Example for amd, expose a 5-core processor :

+# cpuid = ['1:ebx=xxxxxxxx00000001xxxxxxxxxxxxxxxx,

+#             edx=xxx1xxxxxxxxxxxxxxxxxxxxxxxxxxxx',

+# '0x80000008:ecx=xxxxxxxxxxxxxxxx0000xxxx00001010']

+#  - CPUID.1[EBX] : (Thread * Cores ) per processors

+#  - CPUID.1[EDX][HT] : Enable HT

+#  - CPUID.0x80000008[ECX] : Number of vcpus * 2

+#vcpus=5

 

 

 

Thanks,

 

Rob

 

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