OpenShift Origin TSC Error in virtualbox

I've been testing out OpenShift Origin (the Upstream) and running it on VirtualBox.  I've seen the following error during startup:

 [ 0.000000] Fast TSC calibration failed.

To resolve this I searched and found some posts telling me to change the 'Time Stamp Counter' (TSC) clocksource.

1. Start by viewing available clocksources.

• $ cat /sys/devices/system/clocksource/clocksource0/available_clocksource
  
• $ cd /etc/default/ and edit the grub file to add the argument
• clocksource=<name> to GRUB_CMDLINE_LINUX at end of line.
  
• clocksource=acpi_pm (where acpi_pm was other option besides tsc)

1. Reconfigure grub config with the following command. Verify system can reboot.
   
   
2. #  grub2-mkconfig -o /boot/grub2/grub.cfg

Generating grub.cfg ...

Found linux image: /boot/vmlinuz-3.10.3-300.fc19.x86_64

Found initrd image: /boot/initramfs-3.10.3-300.fc19.x86_64.img

Found linux image: /boot/vmlinuz-3.9.5-301.fc19.x86_64

Found initrd image: /boot/initramfs-3.9.5-301.fc19.x86_64.img

Found linux image: /boot/vmlinuz-0-rescue-c5d4e122aa064a89bfb71ea652c37bb1

Found initrd image: /boot/initramfs-0-rescue-c5d4e122aa064a89bfb71ea652c37bb1.img

done