[PLUG] Hyperthreading in Linux [Ajt Kulkarni]

Vivek Kutal vivek.kutal at gmail.com
Fri Sep 1 16:06:19 IST 2006

> Can any body please tell me how to know in HyperThreading is enabled in linux or not.

just cat /proc/cpuinfo  , here if u see info abt 2 processors then it
means that ht is enabled.

also if it is notenabled then is there any command in linux through
which I can enable hyper threading without having to shutdown


first you'll have to enable (if not already enabled) HT from bios  ,
then u need a kernel with smp support.
in ubuntu u can get a smp enabled kernel image by sudo apt-get install
google for the smp image file name for other distros
or u can compile a vanilla kernel and make sure u select SMP support
in menuconfig
(CONFIG_SMP=y in .config)

Thanks and Regards
Vivek Kutal (विवेक)

"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it." - Brian W. Kernighan

More information about the Plug-mail mailing list