[CentOS-virt] [QEMU-KVM] Centos guest VM freezing

Dear team
    I am running a centos guest VM  which freezes for every few days . The
qemu-kvm on  shows 100% cpu utilization.
    Ping to the guest might work or may not work .Please can you tell me
what approach can i take to debug it .
    using "virsh dump" I can dump the core of the  guest vm but I am not
sure how to analyse it .
    Guest Centos VM : "Linux GUESTCentOS70 3.10.0-123.4.4.el7.x86_64 #1 SMP
Fri Jul 25 05:07:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux"
  "CentOS Linux release 7.0.1406 (Core)"
  1 vcpu and 2 GB ram

Host machine : "Linux HOST 3.10.51-1.el6.elrepo.x86_64 #1 SMP Fri Aug 1
13:14:11 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux"
"CentOS release 6.5 (Final)"
qemu-kvm package used : qemu-kvm-0.12.1.2-2.415.el6_5.10.x86_64
Thanks and regards
Akshar
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