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Date: Thu, 12 Jan 2012 21:14:07 +0800
From: "Zhai, Edwin" <edwin.zhai@intel.com>
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To: Bruce Ashfield <bruce.ashfield@windriver.com>
References: <20120111070157.GC10415@edwin-gen> <4F0D83EB.3010008@windriver.com>
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Cc: yocto@yoctoproject.org
Subject: Re: Request to enable SMP and virtio for qemux86/x86-64
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Bruce,
Thanks for your efforts!

Edwin

On 2012/1/11 20:43, Bruce Ashfield wrote:
> On 12-01-11 02:01 AM, Zhai, Edwin wrote:
>> Bruce,
>> Can we enable SMP and virtio by default for qemux86/x86-64? This can
>> achieve
>> huge perf boost for workload inside qemu. E.g. we enabled self-hosted
>> image,
>> where we build yocto inside qemu.
>>
>> Attached patch showes the kernel config option.
>>
>> Is it reasonable?
>
> It should be. I just need to look at the fallback modes, and how this
> impacts different host systems. That being said, I've run with similar
> configs in the past (depending on the workload) with no issues.
>
> qemux8-64 is already SMP, so it would just need the addition of virtio
> devices, which just means we'd look at this as any BSP/target config
> update.
>
> But with graceful degradation (i.e maxcpus with SMP set) and agreement
> that we'd like to simulate SMP by default, then we can make the change
> and I'll merge it into the base config for the target and pull it into
> the kernel tree.
>
> Cheers,
>
> Bruce
>
>
>
>
>>
>> Thanks,
>> Edwin
>>
>