Centos 7.0 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-
Thanks and regards