[Xen-devel] Re: [PATCH][RFC][0/2] x86 SMP: enables core-pair topology detection for AMD CPUs

[Wei Huang <wei.huang2@xxxxxxx>]

Thanks, Jan and George. I attach the latest version which fixes the 
indentation issues.
-Wei


On 06/27/2011 03:58 AM, Jan Beulich wrote:
> > > > On 24.06.11 at 00:51, Wei Huang<wei.huang2@xxxxxxx>  wrote:
> > Hi,
> >
> > The following two patches enable core-pair topology detection for AMD
> > CPUs. The main idea is to record compute unit information into
> > cpuinfo_x86 and use it when building sibling map. The sibling map will
> > be used by Xen credit scheduler to coordinate VCPU scheduling in a
> > fashion similar to SMT. This code is very similar to upstream Linux kernel.
> >
> > Regarding the performance improvement, I saw ~8% improvement running
> > kernel compilation on Dom0 with this patch. Anrea Przywara ran a POVRay
> > benchmark using this patch and he saw ~5% improvement. No perf
> > degradation was seen so far.
> >
> > Please review.
> Apart from some indentation issues these look fine to me.
>
> Jan
>
> > Thanks,
> > -Wei

Attachment: core_pair_1.txt
Description: core_pair_1.txt

Attachment: core_pair_2.txt
Description: core_pair_2.txt

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