I’m liking OVH more and more. Their dedicated servers are cheap, and they’re usually online. Today I figured out how to disable hyperthreading. Here’s how:
Within your server’s IPMI tab, click the big “From a java applet (KVM)” link:
After some time, your browser will download a file called
that file kicks off a bunch of Java nonsense and invalid certificate warnings,
and eventually leads to starting a Java (application? applet?) called “ATEN
Java iKVM Viewer.”
Once started you should see the console of your server. Above it is a menu. Click “Virtual Media” and then “Virtual Keyboard” to bring up a software keyboard that you’ll need later.
Reboot your server, and get ready to click F11 on the virtual keyboard as soon as you see this screen:
Eventually you’ll see the boot menu. Use the virtual arrow keys to select “Enter Setup” and hit enter:
Once in the BIOS setup, use the arrow keys to go over to Advanced, down to CPU Configuration, and and hit enter. There you’ll find an option to remove hyperthreading:
Switch it to Disabled, and hit F4 to save and exit!