Monitoring VM loads

[Jussi Hirvi <listmember@xxxxxxxxxxxx>]

I am using CentOS 5, and kvm virtualization.

My VM stack (about 10 v-machines) now often gets painfully slow, 
probably because of IO limitations. How could I find out where the load 
comes from?

virt-top on the host only shows the processor load. For this situation, 
it is not very useful.

It would be more useful to see on the host a list of VM "load averages", 
because load average at least contains IO, in addition to CPU load. Is 
this possible?

- Jussi
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