Trouble with Setting Up VPS Correctly on Ryzen Dedicated Server

Hi all,

Sorry if I posted this in the wrong forum; had trouble deciding whether to put it here or in the VPS forum.

I am running to some trouble with trying to properly expose a particular CPU topology to a VPS on a CentOS 8 server running KVM and Virtualizor, and was hoping you might be able to help. Not sure if I am doing something wrong and/or not understanding something.

I have an AMD Ryzen 5600X dedicated server with 6 cores and 12 threads. I created a VPS to which I am trying to assign 8 VCPUs (4 cores with 2 threads per core for a total of 8 threads). In Virtualizor, I set CPU units to 1000, CPU cores to 8, and CPU percent to 800. I then select the CPU topology option and specify 1 for sockets, 4 for cores and 2 for threads. CPU mode is host-passthrough. However, when using the lscpu command within the VPS or when checking /proc/cpuinfo, the topology shows up as 1 socket, 8 cores and only 1 thread per core. Does anyone know why this is? Would this affect performance within the VPS at all (that is, are applications not able to take advantage of hyperthreading, or does it even matter that the topology shows up this way)? The topology shows up as expected on an Intel E-2136 server that I tested on, so not sure what the difference is here.

Thanks for any tips you can provide!


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