[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Re: [PATCH][RFC][0/2] x86 SMP: enables core-pair topology detection for AMD CPUs
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. JanThanks, -Wei Attachment:
core_pair_1.txt Attachment:
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