[Qemu-devel] Re: [RFC] allow multi-core guests: introduce cores= option to -cpu

[Avi Kivity]

On 07/05/2009 04:23 PM, Alexander Graf wrote:
> > I thought of using -smp [processors=]2,cores=4,threads=2 (for a total 
> > of 16 threads), but I think it makes more sense with -cpu.
>
>
> I actually think putting this in -smp makes more sense. -cpu really 
> shouldn't need to be touched by normal users and as long as you can 
> either -cpu host or -cpu safe that should be enough.

Maybe.  But in that case -cpu core2duo should imply cores=2 and -smp 2 
-cpu core2duo will bring up 4 cores spread across two sockets.

> But then again maybe we should replace -smp with something more useful 
> like -numa where you'd then specify #CPUs, #cores, mem-cpu connection, 
> etc.

I'd prefer -numa to specify the memory topology (and connections of 
sockets to memory nodes), and -smp or -cpu to specify the intra-socket 
topology.

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