How disable one core from dual core machine

Question

I have a Toshiba Satellite L300 Dual-Core laptop. Due to some problem i need to disable one core. How to do this in Ubuntu ( I have Ubuntu 12.10 ) ?

Will Daniels · Answer 1 · 2012-11-07 04:41:56Z

up vote 1 down vote

To do it dynamically, try (as root):

echo 0 > /sys/devices/system/cpu/cpu1/online

(or cpu0 to disable the first core)

To disable one core during boot use maxcpus=1 kernel parameter.

Alternatively, poke around your BIOS, maybe an option in there.

edited Nov 7 '12 at 4:41

answered Nov 7 '12 at 4:30

Will Daniels
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1 Answer