On 12-01-17 9:06 AM, Bruce Ashfield wrote:

On 12-01-12 08:14 AM, Zhai, Edwin wrote:

Bruce,
Thanks for your efforts!

FYI: I haven't forgotten about this, I'm just reworking a few
things with the 3.2 kernel tree, and will include this as part
of that effort. It will all be available soon.

FYI: I've been testing this with both an updated 3.0 and 3.2 kernel
for the 1.2 release and it seems to cause no issues.

I've made the changes in the repos, and when my 1.2 pull request
comes out for these two trees (in the next day or so), this will be
done.

Cheers,

Bruce

Bruce

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

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