On 2018-03-25, Steven D'Aprano <steve+comp.lang.pyt...@pearwood.info> wrote:
> Not really. With multiple CPUs, you have the option of running two
> distinct OSes in isolation, not merely virtual machines but actual
> distinct machines in the same box.
Not on any of the multi-CPU motherboards I ever worked with. The CPUs
shared SDRAM and used the same physical address space. They both saw
the same PCI/ISA buses and all other peripherals. There was no way you
could run two different OSes without some sort of hypervisor -- there
was no practical difference between them and a modern multi-core CPU.
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