August 4, 2011

virtualbox vboxheadless high cpu usage

If you are running RHEL / CentOS in virtualbox, and find that virtualbox uses high cpu even if the virtual machine is idling, it may be caused by the HZ=1000 timer interrupt issue in your linux kernel. The solution:

add divider=10 to the CentOS kernel parms in /boot/grub/grub.conf

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