Virtualbox cannot assign more than 4 cores (8 core host)

Question

I have windows 10 host running virtualbox Version 5.1.22 r115126 (Qt5.6.2) And an Ubuntu 17.04 x64 guest with guest addition stuff.

The host has AMD 8 core cpu but I get a warning when assigning more than 4 cores to this VM. Would it really harm performance? why is that?

I have tried it in the past on older Ubuntu guest releases and it was the same issue.

Answer 1

找到answer

AMD表示它是8核心，但它实际上是4个物理核心，或者说就是Windows告诉virtualbox的。