AMD proc ryzen 7 report 8 core in place of 16

User Support Hardware Issues
1

Hi everyone,

In fact, lscpu shows 8 cores with 1 thread/core, whereas on other operating systems, lscpu shows 8 cores with 2 threads per core, for a total of 16 core.

is there a chance that it goes better or is it a limit of Qubes-os architecture?

2

Qubes OS disables Hyper-threading (multiple threads/core) in 2018 due to security reasons. More information is available here.

You are able to re-enable it if you fully understand and accept the security consequences. But since you have a relatively powerful CPU, it might be better not to do so as the performance gain might not be worth it.

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3

Thank you, Ali, for your in-depth knowledge on the subject.
I will re-enable because I plan to use a lot of VM for dev purpose, and it will not (supposed to) be dangerously exposed.

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