[vbox-dev] The EMT thread

Frank Mehnert frank.mehnert at oracle.com
Wed Jan 9 01:25:02 PST 2013

Hi Yao,

On Wednesday 09 January 2013 04:36:04 Yao wrote:
> By reading the source code of Vbox, I have met EMT thread in many parts,
> but there is no more information that I can find in the vbox. Are there
> some important file that I ignore? Anyone know about this? Very grateful
> for your reply

in short, the EM thread is the 'emulation thread' which emulates one
guest CPU. One EM thread per guest CPU, so if your guest has 4 CPUs
configured, your VM process will create 4 EM threads. The threads of
a VM process are scheduled by the host.

Kind regards,

Dr.-Ing. Frank Mehnert | Software Development Director, VirtualBox
ORACLE Deutschland B.V. & Co. KG | Werkstr. 24 | 71384 Weinstadt, Germany

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