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Re: [Xen-users] understanding xm top


  • To: "Liang Yang" <multisyncfe991@xxxxxxxxxxx>
  • From: "Tommie McAfee" <tahmmee@xxxxxxxxx>
  • Date: Wed, 15 Nov 2006 14:53:42 -0500
  • Cc: john maclean <jayeola@xxxxxxxxx>, Xen Users <xen-users@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Wed, 15 Nov 2006 11:54:29 -0800
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>


 If xm top shows 10% CPU utilization for domain0, it means the CPU utilization in domain0 is 10% of FOUR physcial CPUs. Is this right?


I  don't think the values scale that way percentage wise, because with 4 physical cpu's, xm-top can show CPU(%) to be as high as 400%.  Unlike the native Linux top command where the scale is 0-100%, if you have 4 cpu's and xm top shows 100% it doesn't mean that your using 100% of 4 physical cpu's (all your processing power), but perhaps 1/4 of your 4 CPU's. 

try doing a 'xm top', and type 'v' on the console window, this should give you a per-cpu break down of each domain,

hope that helps,


--
a.out
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