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:

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After some time, your browser will download a file called kvm.jnlp. Running 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.

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Reboot your server, and get ready to click F11 on the virtual keyboard as soon as you see this screen:

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Eventually you’ll see the boot menu. Use the virtual arrow keys to select “Enter Setup” and hit enter:

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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:

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Switch it to Disabled, and hit F4 to save and exit!