I have been running VirtualBox in headless mode for a while on my home
server. Its just running a single VM with Windows 2011 HomeServer
(windows 2008 R2 based) as a file server I never did notice as there is
very little CPU load that even though the guest is configured with 2
CPUs the load is never on more than 1 core of the 6 core AMD processor.
I only noticed this after being happy with performance and stability of
this setup, I migrated my laptop over to FreeBSD with VirtualBox to run
Windows 8 in a VM, (yes I still have to run Windows for some things at
work) however now that I am actually trying to do some interactive work
in the VM I noticed it was a bit sluggish. And this is when I
discovered that the Intel Core i7 QUAD core CPU was cranking away on one
core while the others were sitting idle. I had configured the VM with 4
CPUS to match those of the host, am I missing some setting? Or is
VirtualBox limited to one thread when running on a FreeBSD host.
FreeBSD is running 9.1p4 compiled from source using Clang with
virtualbox-ose-4.2.16_2 installed from ports, with the following options
# This file is auto-generated by 'make config'.
# Options for virtualbox-ose-4.2.16_2
_FILE_COMPLETE_OPTIONS_LIST=DBUS DEBUG GUESTADDITIONS NLS PULSEAUDIO QT4
UDPTUNNEL VDE VNC WEBSERVICE X11
Dean E. Weimer
email@example.com mailing list
To unsubscribe, send any mail to