On 11.08.2018 18:13, Cheyenne Forbes wrote: > In KVM/QEMU, is it possible to merge two hyper-threaded CPUs for them > to appear as one and give the performance of a non-hyper-threaded CPU? > You mean, that you have hyper threading enabled for your CPU - so in your hypervisor you have two logical CPUs - and want only one VCPU inside the guest, however with the combined performance of both logical CPUs? As a VCPU is just a thread in the hypervisor, which is scheduled on one logical CPU, it will only make use of one logical CPU at a time. The other logical CPU will execute anything else. Of course, if the other logical CPU is idle you might get more performance for the busy logical CPU. But I guess it is in general not possible. -- Thanks, David / dhildenb
