Disable SMT / HyperThreading per core

Question

I try this

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instance-specify-cpu-options.html

But it does not work, as I tried execute from a template.

I would like to disable SMT on AMD processor.

Can i ?

If i have one physical core, i want just one thread, not 2 threads.

Answer

Hi, you did not mention which type of EC2 instance your deploy.
So, please, check this table to check that you instance type of choice allows for the  number of threads per core that you want:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/cpu-options-supported-instances-values.html

To allow further support, let us know which kind of instance in which region you run

You may also want to follow https://ripon-banik.medium.com/how-to-modify-cpu-core-and-disable-hyper-threading-in-ec2-c4671b67bf

The section 'View from OS' will allow to see the OS view on the cpu,

Disable SMT / HyperThreading per core

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