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Re: [Xen-users] 2 DomU and 2 4-cores CPU

To: linuxmasterjedi@xxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] 2 DomU and 2 4-cores CPU
From: Michael Schmidt <michael.schmidt@xxxxxxxxxx>
Date: Fri, 02 Apr 2010 10:29:53 +0200
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Hi,

you can asign all DomUs all cores.
In the case of 100% utilisation of both DomUs, the xen-scheduler provides 50% CPU time from all the CPUs for each DomU. If one DomU idles and the other one, need 100% CPU, it will get the power of all the 8 Cores.

Regards
- Michael Schmidt

L.M.J schrieb:
Hi,

  With my college, I was wondering what is the best optimization for our
setup. I've got 2 VM with 16GB of RAM and 4 vCPU to each one. My server got
2 CPU with 4 cores inside (makes 8 CPU). What produce the best performance
: 1) Give ALL cpu to my 2 VM and each ones will take its 4 vCPU where it
can
  2) Give CPU 0-3 to VM1 and CPU 4-7 to VM2 : each vm own the 4 cores from
1 CPU
  3) Give CPU 0,1,4,5 to VM1 and 2,3,6,7 to VM2 : mix cores  between the
both CPU

  Thanks by advance for any information or point me to any docs talking
about this !
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