[Qemu-discuss] CPU low load problem

[liu_xbing]

hi,all

In a X3850 x6 IBM server(4sockets,14cores/socket, Xeon E7-4820 v4), running on the rhel6.4 virtual machine (qemu-kvm), and occasionally there will be problems, the problem is:

with a 28 vcpu virtual machine as an example:

Running sysben in the virtual machine to do a single thread CPU stress testing, in the virtual machine will see this process takes up 100%cpu, but in the host physical machine to see the QEMU process takes up 3% of the cpu.

Running in the virtual machine inside the two sysben test, in the virtual machine will see the two processes each occupy 100%cpu, but in the host physical machine to see the QEMU process takes up 6% of the cpu.

We tested it on centos7.2. Do you have any solution ?

thanks.