Without any specific error message and/or vmware.log from the attempt to power up a VM with 20 vCPUs/24vCPUs, it is pointless for me to speculate why your attempts failed. You could try setting CPU core affinity use the vmx entries such as e = "TRUE". For example, specifying "Number of processors" of 2 for Windows 10/11 Professional Edition OS VM is viable but for Home Edition it won't be able to recognise the extra virtual socket and thus reduces the number of else notice this? Anyway, the number of virtual sockets does not affect VM performance. So theoretically you can reach 24 vCPU using 1x24, 2x12, or 8x3, 4圆.
Only the "Number of processors" are powers of 2 (1, 2, 4, 8, 16, 32). The "number of cores per processors" are not in powers of 2. That's only 2/3, leaving a lot of wasted power!? The results were the same.Īnyone else notice cannot specify the right number of cores: Since the # of processors and cores per processor are powers of two, the maximum I can configure in the UI is 16 cores out of 24 that I have. I tried both the standard vm mode and hyper-v based mode. This explains why changing the core count does not improve the performance, because it's using only the efficiency cores! The total CPU utilization was stuck at slightly over 50%.
8 and 16 were supported by the UI.īut in all 4 cases, I tried running some benchmarks, and the numbers were identical! I looked at the per-core CPU utility in HWInfo, and it seems that all of the CPU were pinned on the efficiency cores and my power cores were barely getting any use. The 24 core version refused to boot, i didn't debug that further. I can edit the vmx file manually and manually specify the number of cores via the numvcpus parameter, but that leads to problem two:Ģ) Something is wrong with processor performance. There are several problems that I've noticed:ġ) cannot specify the right number of cores: Since the # of processors and cores per processor are powers of two, the maximum I can configure in the UI is 16 cores out of 24 that I have. I have an intel i9-12900 processor running VMWare Workstation Pro 16 on windows 11 running Ubuntu 18.04 guest.
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