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Re: [Qemu-devel] [RFC] allow multi-core guests: introduce cores= option
From: |
Paul Brook |
Subject: |
Re: [Qemu-devel] [RFC] allow multi-core guests: introduce cores= option to -cpu |
Date: |
Sat, 4 Jul 2009 06:58:13 +0100 |
User-agent: |
KMail/1.11.4 (Linux/2.6.29-2-amd64; KDE/4.2.4; x86_64; ; ) |
On Saturday 04 July 2009, Andre Przywara wrote:
> Paul Brook wrote:
> >> currently SMP guests happen to see <n> vCPUs as <n> different sockets.
> >> Some guests (Windows comes to mind) have license restrictions and refuse
> >> to run on multi-socket machines.
> >> So lets introduce a "cores=" parameter to the -cpu option to let the
> >> user specify the number of _cores_ the guest should see.
> >
> > Sounds like this should be part of the -numa option.
>
> Sound reasonable on the first glance, but would make it rather
> complicated in real life. I suppose multi-core is far more interesting
> to most of the people than multi-node, so I would opt for the easier:
> -smp 2,cores=2 to specify a dual core guest.
I disagree. I think it makes a sense of the topology of nodes, cores and
threads to all be specified in the same place. All the options you don't
specify should have sensible defaults.
Paul
- [Qemu-devel] [RFC] allow multi-core guests: introduce cores= option to -cpu, Andre Przywara, 2009/07/03
- Re: [Qemu-devel] [RFC] allow multi-core guests: introduce cores= option to -cpu, Samuel Thibault, 2009/07/03
- [Qemu-devel] Re: [RFC] allow multi-core guests: introduce cores= option to -cpu, Brian Jackson, 2009/07/03
- Re: [Qemu-devel] [RFC] allow multi-core guests: introduce cores= option to -cpu, Paul Brook, 2009/07/03
- [Qemu-devel] Re: [RFC] allow multi-core guests: introduce cores= option to -cpu, Avi Kivity, 2009/07/04
- [Qemu-devel] Re: [RFC] allow multi-core guests: introduce cores= option to -cpu, Alexander Graf, 2009/07/05
- [Qemu-devel] Re: [RFC] allow multi-core guests: introduce cores= option to -cpu, Avi Kivity, 2009/07/05
- [Qemu-devel] Re: [RFC] allow multi-core guests: introduce cores= option to -cpu, Gleb Natapov, 2009/07/05
- [Qemu-devel] Re: [RFC] allow multi-core guests: introduce cores= option to -cpu, Avi Kivity, 2009/07/05
- [Qemu-devel] Re: [RFC] allow multi-core guests: introduce cores= option to -cpu, Alexander Graf, 2009/07/05
- [Qemu-devel] Re: [RFC] allow multi-core guests: introduce cores= option to -cpu, Avi Kivity, 2009/07/05