[Qemu-devel] What about SMP support in QEMU?

[Qemu-devel] What about SMP support in QEMU?

[Naruil]

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Is SMP supported in qemu on the following target architectures?

ARM    SPARC    MIPS


Many thanks
Naruil

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Re: [Qemu-devel] What about SMP support in QEMU?

[Robin Randhawa]

Hi Naruil.

On 16 Sep 2009, at 14:21, Naruil wrote:

> Is SMP supported in qemu on the following target architectures?
>
> ARM    SPARC    MIPS

AFAIK, qemu ARM has SMP support. More specifically, qemu models an  
ARM11 MPCore on a realview baseboard system. It is capable of booting  
Linux SMP on this model.

FYI, (and this is based on cursory examination so could be wrong) -  
qemu's SMP support is not 'concurrent' - qemu switches between the  
emulation of individual MPCores and there is no mapping of core  
emulation to host cores (that would be a more realistic model of SMP  
concurrency) since that is fraught with locking overheads etc and is  
likely to make the qemu translation process very slow.

HTH,
Robin

Re: [Qemu-devel] What about SMP support in QEMU?

[Blue Swirl]

On Wed, Sep 16, 2009 at 4:21 PM, Naruil <naruilone@gmail.com> wrote:
> Is SMP supported in qemu on the following target architectures?
>
> ARM    SPARC    MIPS

Sparc32 can emulate 4 CPUs, works with Linux guest at least. The
emulated platform should be SS-600MP, SS-10 or SS-20.