100% cpu usage with kvm

zoid

New Member
Mar 23, 2012
10
0
1
Hi, I'm having a strange behavior with proxmox and kvm.

First, the setup data:

Code:
kvm1:~# pveversion -v
pve-manager: 1.9-26 (pve-manager/1.9/6567)
running kernel: 2.6.32-7-pve
proxmox-ve-2.6.32: 1.9-55+ovzfix-2
pve-kernel-2.6.32-6-pve: 2.6.32-55+ovzfix-1
pve-kernel-2.6.32-7-pve: 2.6.32-55+ovzfix-2
qemu-server: 1.1-32
pve-firmware: 1.0-15
libpve-storage-perl: 1.0-19
vncterm: 0.9-2
vzctl: 3.0.29-3pve1
vzdump: 1.2-16
vzprocps: 2.0.11-2
vzquota: 3.0.11-1
pve-qemu-kvm: 0.15.0-2
ksm-control-daemon: 1.0-6

CPU: Intel(R) Xeon(R) CPU E31220 @ 3.10GHz
RAM: 8GB DDR3 ECC

The storage stack:
< Dell MD3200i> ----iSCSI---< bond1 (eth2+eth3) >

eth0 and eth1 are bonded into bond0 and that is bridged to vmbr0, so both management/service and storage network have multipath access, using alb balance.

I installed a guest with ubuntu server 10.04 amd64, and the CPUs on the host started to use 100%. This happens instantly when the vm boots, with 4 vcpus.
When I boot it with 1 vcpu, the cpu use seems normal.