Re: Virtualization Performance: Intel vs. AMD

Thomas Fjellstrom
2009-11-15T17:54:53Z

On Sun November 15 2009, Neil Aggarwal wrote:
> > The Core i7 has hyperthreading, so you see 8 logical CPUs.
>
> Are you saying the AMD processors do not have hyperthreading?

Course not. Hyperthreading is dubious at best.

> I have a machine with two six-core AMD Opterons.
> top shows me 12 logical CPUs.

If it had Hyperthreading, you'd see 24 logical cpus.
6 + 6 == 12 * 2(ht) == 24.

Those six cores in each cpu are actual physcial cores. Not fake logical
cores.

> Neil
>
>
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Thomas Fjellstrom
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