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SubjectRe: [patch v4 01/18] sched: set SD_PREFER_SIBLING on MC domain to reduce a domain level
On 02/12/2013 06:11 PM, Peter Zijlstra wrote:
> On Thu, 2013-01-24 at 11:06 +0800, Alex Shi wrote:
>> The domain flag SD_PREFER_SIBLING was set both on MC and CPU domain at
>> frist commit b5d978e0c7e79a, and was removed uncarefully when clear up
>> obsolete power scheduler. Then commit 6956dc568 recover the flag on CPU
>> domain only. It works, but it introduces a extra domain level since this
>> cause MC/CPU different.
>>
>> So, recover the the flag in MC domain too to remove a domain level in
>> x86 platform.

May I still miss the points of this patch:
Without this patch, the domain levels on my machines are:
SMT, MC, CPU, NUMA

with this patch, the domain levels are:
SMT, MC, NUMA

--
Thanks
Alex


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