RE: [Xen-ia64-devel] Time for hybrid virtualization?

[Kayvan Sylvan <kayvan@xxxxxxxxx>]

> From: tgingold@xxxxxxx [tgingold@xxxxxxx]
>
> Can you tell us a little bit more about your machine?
>
> Is it 16 logical cpus (hyperthread) or 16 cores ?
>
> Are all the cpus on the same bus or is it a NUMA machine ?
>
> That could explain the drop off.

That's probably it.

The machine is 32 dual-core CPUs, showing up as 64 CPUs and it is organized as 
8 cells, each with 4 physical CPU chips.

How does the Xen hypervisor manage the inter-processor interrupts? I'm trying 
to understand if there is something in the way the processors are managed that 
can be changed to improve the way this scales on large multi-processor 
configurations.

Best regards,

---Kayvan Sylvan

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